|
|
ds_anom_trigger[
/ds_anom_trigger=
0..8]
(Type is Int32)
-
attributes
-
long_name:
Anomaly Trigger Dimension Scale
(Type is String)
-
units:
1
(Type is String)
-
source:
dim_scale
(Type is String)
-
valid_min:
1
(Type is Int32)
-
valid_max:
9
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dimension scale indexing the short segment anomaly trigger array having nine elements. Index = 1 corresponds to coarse ht difference; Index = 2 corresponds to abnormal length; Index = 3 corresponds to histogram mode spread; Index = 4 corresponds to histogram mode count; Index = 5 corresponds to histogram mode intensity; Index = 6 corresponds to invalid long segment; Index = 7 corresponds to shore buffer designation; Index = 8 corresponds to insufficient signal phs; Index = 9 corresponds to unavailability of coarse water height against which to test.
(Type is String)
-
flag_meanings:
coarse_ht_difference abnormal_length histogram_mode_spread histogram_mode_count histogram_mode_intensity invalid_long_segment shore_buffer_designation insufficient_signal_phs coarse_water_height_unavailable
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int32)
ds_sseg_quality[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment Quality Dimension Scale
(Type is String)
-
units:
1
(Type is String)
-
source:
dim_scale
(Type is String)
-
valid_min:
1
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dimension scale indexing the short segment quality array. Index = 1 corresponds to nominal; Index = 2 corresponds to possible afterpulse; Index = 3 corresponds to possible impulse response; Index = 4 corresponds to possible TEP
(Type is String)
-
flag_meanings:
nominal possible_afterpulse possible_impulse_response possible_TEP
(Type is String)
-
flag_values:
1, 2, 3, 4
(Type is Int32)
orbit_info(Type is Group)
Dimensions:
[
/orbit_info/crossing_time =
0..2
]
[
/orbit_info/sc_orient_time =
0..0
]
-
sc_orient_time[
/orbit_info/sc_orient_time=
0..0]
(Type is Float64)
-
attributes
-
long_name:
Time of Last Spacecraft Orientation Change
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
POD/PPD
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
crossing_time[
/orbit_info/crossing_time=
0..2]
(Type is Float64)
-
attributes
-
long_name:
Ascending Node Crossing Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
POD/PPD
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
orbit_number[
/orbit_info/crossing_time=
0..2]
(Type is UInt16)
-
attributes
-
long_name:
Orbit Number
(Type is String)
-
units:
1
(Type is String)
-
source:
Operations
(Type is String)
-
valid_min:
1
(Type is UInt16)
-
valid_max:
65000
(Type is UInt16)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique identifying number for each planned ICESat-2 orbit.
(Type is String)
-
coordinates:
crossing_time
(Type is String)
-
sc_orient[
/orbit_info/sc_orient_time=
0..0]
(Type is Int8)
-
attributes
-
long_name:
Spacecraft Orientation
(Type is String)
-
units:
1
(Type is String)
-
source:
POD/PPD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode.
(Type is String)
-
coordinates:
sc_orient_time
(Type is String)
-
flag_meanings:
backward forward transition
(Type is String)
-
flag_values:
0, 1, 2
(Type is Int8)
-
rgt[
/orbit_info/crossing_time=
0..2]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
POD/PPD
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs.
(Type is String)
-
coordinates:
crossing_time
(Type is String)
-
cycle_number[
/orbit_info/crossing_time=
0..2]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
1
(Type is String)
-
source:
Operations
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
A count of the number of exact repeats of this reference orbit.
(Type is String)
-
coordinates:
crossing_time
(Type is String)
-
lan[
/orbit_info/crossing_time=
0..2]
(Type is Float64)
-
attributes
-
long_name:
Ascending Node Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
POD/PPD
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at the ascending node crossing.
(Type is String)
-
coordinates:
crossing_time
(Type is String)
-
bounding_polygons(Type is Group)
-
lat24[
0..10]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon25[
0..22]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat21[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat28[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon15[
0..24]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon7[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat18[
0..14]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon3[
0..22]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat14[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat25[
0..22]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat8[
0..14]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon26[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon9[
0..12]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat4[
0..10]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat3[
0..22]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon17[
0..10]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon11[
0..36]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat7[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat20[
0..48]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon14[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon28[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon31[
0..48]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon35[
0..10]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat15[
0..24]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat22[
0..16]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon13[
0..48]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon33[
0..50]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat5[
0..12]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lat19[
0..48]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Latitude values for a bounding polygon.
(Type is String)
-
lon2[
0..48]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lon5[
0..12]
(Type is Float64)
-
attributes
-
long_name:
Polygon Longitude
(Type is String)
-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Longitude values for a bounding polygon.
(Type is String)
-
lat16[
0..12]
(Type is Float64)
-
attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
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attributes
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long_name:
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lat27[
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attributes
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long_name:
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lon21[
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attributes
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long_name:
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source:
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lat30[
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attributes
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long_name:
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source:
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lon10[
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attributes
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long_name:
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source:
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lon22[
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attributes
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long_name:
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units:
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source:
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lat32[
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attributes
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long_name:
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source:
geo_poly
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lon29[
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attributes
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long_name:
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source:
geo_poly
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lon24[
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attributes
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long_name:
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source:
geo_poly
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lon34[
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attributes
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long_name:
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units:
degrees_east
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source:
geo_poly
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180.
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contentType:
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lon12[
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attributes
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long_name:
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source:
geo_poly
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lat13[
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attributes
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long_name:
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units:
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source:
geo_poly
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90.
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auxiliaryInformation
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lat23[
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attributes
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long_name:
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units:
degrees_north
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source:
geo_poly
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lat29[
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attributes
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long_name:
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degrees_north
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source:
geo_poly
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lat31[
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attributes
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long_name:
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source:
geo_poly
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lat6[
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attributes
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long_name:
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units:
degrees_north
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source:
geo_poly
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lat34[
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attributes
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long_name:
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units:
degrees_north
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source:
geo_poly
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90.
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contentType:
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lat2[
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attributes
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long_name:
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units:
degrees_north
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source:
geo_poly
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valid_min:
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90.
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contentType:
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description:
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lon32[
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attributes
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long_name:
Polygon Longitude
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units:
degrees_east
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-
source:
geo_poly
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valid_min:
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180.
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contentType:
auxiliaryInformation
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lat1[
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attributes
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long_name:
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units:
degrees_north
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source:
geo_poly
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valid_min:
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90.
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lat33[
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attributes
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long_name:
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source:
geo_poly
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lat26[
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attributes
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long_name:
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source:
geo_poly
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lon30[
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attributes
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long_name:
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source:
geo_poly
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180.
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lon19[
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attributes
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long_name:
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source:
geo_poly
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lon23[
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attributes
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long_name:
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units:
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source:
geo_poly
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lon18[
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attributes
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long_name:
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units:
degrees_east
(Type is String)
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source:
geo_poly
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valid_min:
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180.
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lon6[
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attributes
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long_name:
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source:
geo_poly
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lat17[
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attributes
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long_name:
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units:
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(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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90.
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contentType:
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lat9[
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(Type is Float64)
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attributes
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long_name:
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units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
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valid_max:
90.
(Type is Float64)
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contentType:
auxiliaryInformation
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description:
Latitude values for a bounding polygon.
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lon1[
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(Type is Float64)
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attributes
-
long_name:
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units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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180.
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contentType:
auxiliaryInformation
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lon27[
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attributes
-
long_name:
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units:
degrees_east
(Type is String)
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source:
geo_poly
(Type is String)
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180.
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contentType:
auxiliaryInformation
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lon4[
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(Type is Float64)
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attributes
-
long_name:
Polygon Longitude
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units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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(Type is Float64)
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valid_max:
180.
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contentType:
auxiliaryInformation
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description:
Longitude values for a bounding polygon.
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lat10[
0..12]
(Type is Float64)
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attributes
-
long_name:
Polygon Latitude
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units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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90.
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contentType:
auxiliaryInformation
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description:
Latitude values for a bounding polygon.
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lat11[
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attributes
-
long_name:
Polygon Latitude
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units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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(Type is Float64)
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valid_max:
90.
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contentType:
auxiliaryInformation
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description:
Latitude values for a bounding polygon.
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lon8[
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attributes
-
long_name:
Polygon Longitude
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units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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180.
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contentType:
auxiliaryInformation
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description:
Longitude values for a bounding polygon.
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lon20[
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attributes
-
long_name:
Polygon Longitude
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-
units:
degrees_east
(Type is String)
-
source:
geo_poly
(Type is String)
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valid_min:
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(Type is Float64)
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valid_max:
180.
(Type is Float64)
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contentType:
auxiliaryInformation
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description:
Longitude values for a bounding polygon.
(Type is String)
-
lat35[
0..10]
(Type is Float64)
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attributes
-
long_name:
Polygon Latitude
(Type is String)
-
units:
degrees_north
(Type is String)
-
source:
geo_poly
(Type is String)
-
valid_min:
-90.
(Type is Float64)
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valid_max:
90.
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contentType:
auxiliaryInformation
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METADATA(Type is Group)
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iso_19139_dataset_xml[
0..0]
(Type is String)
-
iso_19139_series_xml[
0..0]
(Type is String)
-
AcquisitionInformation(Type is Group)
no attributes
-
DataQuality(Type is Group)
-
ProductSpecificationDocument(Type is Group)
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attributes
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ShortName:
ATL13_SDP
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-
characterSet:
utf8
(Type is String)
-
language:
eng
(Type is String)
-
publicationDate:
Feb 2020
(Type is String)
-
title:
ICESat-2-SIPS-SPEC-4267 - ATLAS Science Algorithm Standard Data Product (SDP) Volume T12 (ATL13). Revision -.
(Type is String)
-
edition:
v3.3
(Type is String)
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SeriesIdentification(Type is Group)
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attributes
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maintenanceAndUpdateFrequency:
asNeeded
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-
maintenanceDate:
SET_BY_META
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VersionID:
007
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language:
eng
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characterSet:
utf8
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pointOfContact:
NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center
(Type is String)
-
longName:
ATLAS/ICESat-2 L3A Along Track Inland Surface Water Data
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-
shortName:
ATL13
(Type is String)
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identifier_product_DOI:
doi:10.5067/ATLAS/ATL13.007
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-
revisionDate:
2022-08-09
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-
resourceProviderOrganizationName:
National Aeronautics and Space Administration (NASA)
(Type is String)
-
abstract:
The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams.
(Type is String)
-
purpose:
The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics.
(Type is String)
-
credit:
The software that generates the ATL13 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland.
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status:
onGoing
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format:
HDF
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formatVersion:
5
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topicCategory:
geoscientificInformation
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mission:
ICESat-2 > Ice, Cloud, and land Elevation Satellite-2
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attributes
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spatialRepresentationType:
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creationDate:
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uuid:
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fileName:
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language:
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originatorOrganizationName:
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(Type is String)
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abstract:
The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams.
(Type is String)
-
purpose:
The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics.
(Type is String)
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credit:
The software that generates the ATL13 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland.
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status:
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attributes
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northBoundLatitude:
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eastBoundLongitude:
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southBoundLatitude:
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(Type is Float64)
-
westBoundLongitude:
-180.
(Type is Float64)
-
rangeBeginningDateTime:
2025-09-11T19:17:26.000000Z
(Type is String)
-
rangeEndingDateTime:
2025-09-12T01:34:36.000000Z
(Type is String)
-
QADatasetIdentification(Type is Group)
-
attributes
-
creationDate:
2025-12-22T20:49:02.000000Z
(Type is String)
-
abstract:
An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule
(Type is String)
-
fileName:
ATL13_20250911191726_13452801_007_02.qa
(Type is String)
-
Lineage(Type is Group)
no attributes
-
Control(Type is Group)
-
attributes
-
description:
Text-based keyword=value file generated automatically within the ICESat-2 data system that specifies all of the conditions required for each individual run of the software.
(Type is String)
-
fileName:
CTL_atlas_l3a_iw_021426055.ctl
(Type is String)
-
shortName:
CNTL
(Type is String)
-
version:
1
(Type is String)
-
ANC38-13(Type is Group)
-
attributes
-
description:
ISO 19139 XML file containing DataSet-level metadata information.
(Type is String)
-
fileName:
ANC38-13_20250523205159_007_01.xml
(Type is String)
-
shortName:
ANC38-13
(Type is String)
-
uuid:
527a0d6a-3fbd-3a9c-833e-a76aa0c2fffa
(Type is String)
-
version:
007
(Type is String)
-
ANC36-13(Type is Group)
-
attributes
-
description:
ISO 19139 XML file containing Series-level metadata information.
(Type is String)
-
fileName:
ANC36-13_20250523205158_007_01.xml
(Type is String)
-
shortName:
ANC36-13
(Type is String)
-
uuid:
434d6e13-f24e-3081-aff7-e3893a2b8945
(Type is String)
-
version:
007
(Type is String)
-
ANC26-13(Type is Group)
-
attributes
-
description:
HDF5 template file that defines the organization and default content of the product metadata.
(Type is String)
-
fileName:
atl13_metadata_template.h5
(Type is String)
-
shortName:
ANC26-13
(Type is String)
-
uuid:
92fd7663-ad71-378e-b85b-c7a1cc34b8ab
(Type is String)
-
version:
041
(Type is String)
-
ATL03(Type is Group)
-
attributes
-
description:
ICESat-2 ATLAS L2A Global Geolocated Photon data products.
(Type is String)
-
fileName:
ATL03_20250911211241_13462804_007_01.h5, ATL03_20250911211750_13462805_007_01.h5, ATL03_20250911212316_13462806_007_01.h5, ATL03_20250911213146_13462807_007_01.h5, ATL03_20250911213848_13462808_007_01.h5, ATL03_20250911215933_13462811_007_01.h5, ATL03_20250911220516_13462812_007_01.h5, ATL03_20250911221257_13462813_007_01.h5, ATL03_20250911221859_13462814_007_01.h5, ATL03_20250911222602_13472801_007_01.h5, ATL03_20250911223304_13472802_007_01.h5, ATL03_20250911224134_13472803_007_01.h5, ATL03_20250911224659_13472804_007_01.h5, ATL03_20250911225208_13472805_007_01.h5, ATL03_20250911225733_13472806_007_01.h5, ATL03_20250911230604_13472807_007_01.h5, ATL03_20250911231305_13472808_007_01.h5, ATL03_20250911232008_13472809_007_01.h5, ATL03_20250911232610_13472810_007_01.h5, ATL03_20250911233351_13472811_007_01.h5, ATL03_20250911233934_13472812_007_01.h5, ATL03_20250911234715_13472813_007_01.h5, ATL03_20250911235317_13472814_007_01.h5, ATL03_20250912000018_13482801_007_01.h5, ATL03_20250912000720_13482802_007_01.h5, ATL03_20250912001551_13482803_007_01.h5, ATL03_20250912002116_13482804_007_01.h5, ATL03_20250912002625_13482805_007_01.h5, ATL03_20250912003150_13482806_007_01.h5, ATL03_20250912005425_13482809_007_01.h5, ATL03_20250912010027_13482810_007_01.h5, ATL03_20250912010807_13482811_007_01.h5, ATL03_20250912011351_13482812_007_01.h5, ATL03_20250912012131_13482813_007_01.h5, ATL03_20250912012733_13482814_007_01.h5
(Type is String)
-
shortName:
ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03, ATL03
(Type is String)
-
uuid:
707d300c-60bd-329e-99e2-d7e3997e2f15, 125c826a-0b21-3ea6-8146-41b31c27cc8c, 12866cae-c5ac-3227-84ce-80a82279f8d7, ae21a86b-afc1-3239-9295-ccc06efd7466, ed468c36-b3e3-3d21-81c4-da02d09c47b0, 9c8dbb0b-b248-3d2a-bb1e-f8ce3e90e276, 48418869-16c8-3a8d-85d6-59687bab0c38, 728afbd2-bc61-3d4c-b6a7-57d9a6fcc622, 2d485087-6018-35aa-bcec-a4ed8c83f21a, b2c0be1f-07ac-3d17-8517-0a13282469c0, bd818098-4f97-3bd8-a9e8-d93af3bc584a, b35f2a1b-b429-361a-81cb-914bb748e06f, 4db49d0c-fe4a-3745-a983-3f44984c62c2, d793a62d-0c6b-32e8-999d-4060908e1d3e, 97f561fc-3559-3d9f-b35e-e48e6bbd38ae, 4161332a-b682-3187-bc50-4fee81770963, a0e5297f-40a2-300a-a983-52aef7c05a66, 8c3fe7b6-0286-336f-8b76-6c9fa5672349, 8db6d4ae-73a3-3e36-8653-bed590fe309b, 1345c50e-0179-34fd-a3b5-f9fad0125d2b, 9e25e992-3ed2-3e7b-9d00-e6ab5d3f29a4, a610cfa4-f481-32ea-9cee-2a4af231d36c, 77e67e93-5a61-3322-b5ea-2f468cc7cc8a, da41c3d9-a29f-3b21-b4fb-789547abf2dc, 597eb9db-acc9-31fa-a200-c13986f428f0, 209f638a-0bbf-3f4c-bf0d-a9f60fbb8f5a, 367b60b6-b080-35a6-9ff5-af6a5ee0de58, 52679700-2416-382c-ad96-195122d90e0f, c1441ce1-bbbe-3b5e-b690-8b23132a4579, 970f9765-eab9-3c2b-8a9b-748348d3ff87, 7ded6457-91af-3e9a-9036-82f603d60b23, 6e423d94-7801-39ae-8d52-061a3ad80e5e, fd67730b-a158-386a-9e0f-83deaf66b928, 76372cd9-939c-3e3a-b27e-1c34afa824ad, 6b8d0071-c0ac-385f-9d3f-64c3a987d732
(Type is String)
-
version:
007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007, 007
(Type is String)
-
start_cycle:
28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28
(Type is Int32)
-
end_cycle:
28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28
(Type is Int32)
-
start_orbit:
38996, 38996, 38996, 38996, 38996, 38996, 38996, 38996, 38996, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998
(Type is Int32)
-
end_orbit:
38996, 38996, 38996, 38996, 38996, 38996, 38996, 38996, 38996, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38997, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998, 38998
(Type is Int32)
-
start_rgt:
1346, 1346, 1346, 1346, 1346, 1346, 1346, 1346, 1346, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348
(Type is Int32)
-
end_rgt:
1346, 1346, 1346, 1346, 1346, 1346, 1346, 1346, 1346, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1347, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348, 1348
(Type is Int32)
-
start_region:
4, 5, 6, 7, 8, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14
(Type is Int32)
-
end_region:
4, 5, 6, 7, 8, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14
(Type is Int32)
-
start_geoseg:
446047, 555736, 671060, 852076, 1001777, 1443579, 1565340, 1728837, 1857240, 1, 149699, 330711, 446034, 555722, 671047, 852068, 1001775, 1151678, 1280088, 1443590, 1565349, 1728845, 1857245, 1, 149696, 330708, 446033, 555720, 671049, 1151688, 1280098, 1443599, 1565353, 1728847, 1857246
(Type is Int32)
-
end_geoseg:
555735, 671059, 852075, 1001776, 1151673, 1565339, 1728836, 1857239, 2007130, 149698, 330710, 446033, 555721, 671046, 852067, 1001774, 1151677, 1280087, 1443589, 1565348, 1728844, 1857244, 2007132, 149695, 330707, 446032, 555719, 671048, 852074, 1280097, 1443598, 1565352, 1728846, 1857245, 2007134
(Type is Int32)
-
ATL09(Type is Group)
-
attributes
-
description:
ICESat-2 ATLAS L3A atmosphere data products.
(Type is String)
-
fileName:
ATL09_20250911205144_13462801_007_01.h5, ATL09_20250911222602_13472801_007_01.h5, ATL09_20250912000018_13482801_007_01.h5
(Type is String)
-
shortName:
ATL09, ATL09, ATL09
(Type is String)
-
uuid:
20800f06-ef53-305c-8ddb-7ef98589ae9a, 4d1f8233-22da-38f2-be82-ae178b223964, 5261c889-db07-308a-ade4-d4d9b8d7ccfc
(Type is String)
-
version:
007, 007, 007
(Type is String)
-
start_cycle:
28, 28, 28
(Type is Int32)
-
end_cycle:
28, 28, 28
(Type is Int32)
-
start_orbit:
38996, 38997, 38998
(Type is Int32)
-
end_orbit:
38996, 38997, 38998
(Type is Int32)
-
start_rgt:
1346, 1347, 1348
(Type is Int32)
-
end_rgt:
1346, 1347, 1348
(Type is Int32)
-
start_region:
1, 1, 1
(Type is Int32)
-
end_region:
14, 14, 14
(Type is Int32)
-
start_geoseg:
551628, 3, 2
(Type is Int32)
-
end_geoseg:
2007125, 2007126, 2007134
(Type is Int32)
-
ANC19(Type is Group)
-
attributes
-
description:
TAI to UTC leapsecond file retrieved from ftp://maia.usno.navy.mil/ser7/tai-utc.dat
(Type is String)
-
fileName:
tai_utc_2017.dat
(Type is String)
-
shortName:
ANC19
(Type is String)
-
uuid:
7c66d365-278a-31f7-8fe4-9c80e2f012e5
(Type is String)
-
version:
001
(Type is String)
-
ANC25-13(Type is Group)
-
attributes
-
description:
HDF5 template file that defines the organization and default content of the product.
(Type is String)
-
fileName:
atl13_template.h5
(Type is String)
-
shortName:
ANC25-13
(Type is String)
-
uuid:
babdaeb6-b231-3658-9cd6-b4a60b095bd8
(Type is String)
-
version:
041
(Type is String)
-
ANC20-01(Type is Group)
-
attributes
-
description:
Water Basin shapefiles provided by the Inland Water ATBD lead.
(Type is String)
-
fileName:
ATL13_Region_Mask_by_basins_20170201.dbf
(Type is String)
-
shortName:
ANC20-01
(Type is String)
-
uuid:
9d332759-a01c-3a75-a4ae-0b4306924e52
(Type is String)
-
version:
20170201
(Type is String)
-
ANC20-02(Type is Group)
-
attributes
-
description:
Water Body shapefiles provided by the Inland Water ATBD lead.
(Type is String)
-
fileName:
ATL13_Inland_Water_Body_Mask_v3_20191220.dbf
(Type is String)
-
shortName:
ANC20-02
(Type is String)
-
uuid:
828c2c64-0165-3179-af17-fcc9721d4ceb
(Type is String)
-
version:
20191220
(Type is String)
-
ProcessStep(Type is Group)
no attributes
-
Browse(Type is Group)
-
attributes
-
processDescription:
Browse processing is performed for each granule SIPS produces. The browse utility reads data from the granule and produces browse images as defined in the respective product ATBD. The utility then embeds each browse image into the product within the /Browse group.
(Type is String)
-
identifier:
atlas_brw
(Type is String)
-
softwareVersion:
Version 3.1.3
(Type is String)
-
softwareDate:
Apr 8 2025
(Type is String)
-
softwareTitle:
Creates ATLAS HDF5 browse files
(Type is String)
-
runTimeParameters:
CTL_atlas_l3a_iw_021426055.ctl
(Type is String)
-
stepDateTime:
2025-12-22T20:49:05.000000Z
(Type is String)
-
Metadata(Type is Group)
-
attributes
-
processDescription:
Metadata information is processed by the metadata utility for each granule produced by SIPS. During PGE processing, dynamic metadata are written to the product. Additional static information is provided with the metadata template. The metadata utility reads ISO Dataset and Series metadata files and updates the product with static information from within those files. The utility then merges the static and dynamic metadata to creates output ISO19139 Dataset and Series XML files. Finally the utility reads the ISO19139 Dataset and Series XML files into memory and stores the textual representations as attributes attached to the /METADATA group.
(Type is String)
-
identifier:
atlas_meta
(Type is String)
-
softwareVersion:
Version 5.1.3
(Type is String)
-
softwareDate:
Apr 8 2025
(Type is String)
-
softwareTitle:
Creates ATLAS XML metadata files
(Type is String)
-
runTimeParameters:
CTL_atlas_l3a_iw_021426055.ctl
(Type is String)
-
stepDateTime:
2025-12-22T20:51:30.000000Z
(Type is String)
-
PGE(Type is Group)
-
attributes
-
ATBDDate:
12/04/2019
(Type is String)
-
ATBDTitle:
Algorithm Theoretical Basis Document (ATBD) for Inland Water Data Products ATL13
(Type is String)
-
ATBDVersion:
v.3
(Type is String)
-
documentDate:
Feb 2020
(Type is String)
-
documentation:
ATLAS Science Algorithm Software Design Description (SDD) - Volume 21 (atlas_l3a_iw)
(Type is String)
-
processDescription:
Computes along-track inland water surface height, slope, and roughness for each ATLAS beam, and also aspect and maximum slope (or gradient) of the planar surface between adjacent strong beams.
(Type is String)
-
identifier:
atlas_l3a_iw
(Type is String)
-
softwareVersion:
Version 4.1.1
(Type is String)
-
softwareDate:
Jul 30 2025
(Type is String)
-
softwareTitle:
ASAS L3A Inland Water PGE
(Type is String)
-
runTimeParameters:
CTL_atlas_l3a_iw_021426055.ctl
(Type is String)
-
stepDateTime:
2025-12-22T18:32:36.000000Z
(Type is String)
-
QA(Type is Group)
-
attributes
-
processDescription:
QA processing is performed by an external utility on each granule produced by SIPS. The utility reads the granule, performs both generic and product-specific quality-assessment calculations, and writes a text-based quality assessment report. The name and creation data of this report are identified within the QADatasetIdentification metadata
(Type is String)
-
identifier:
atl13_qa_util
(Type is String)
-
softwareVersion:
Version 4.1
(Type is String)
-
softwareDate:
Apr 8 2025
(Type is String)
-
softwareTitle:
ATL13 QA Utility
(Type is String)
-
runTimeParameters:
CTL_atlas_l3a_iw_021426055.ctl
(Type is String)
-
stepDateTime:
2025-12-22T20:49:02.000000Z
(Type is String)
gt1r(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce3
(Type is String)
-
atlas_beam_type:
strong
(Type is String)
-
groundtrack_id:
gt1r
(Type is String)
-
atmosphere_profile:
profile_1
(Type is String)
-
atlas_spot_number:
5
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt1r/delta_time =
0..40047
]
-
segment_lon[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt1r/delta_time=
0..40047]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt1r/delta_time=
0..40047]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt1r/delta_time=
0..40047]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt1r/delta_time=
0..40047]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt1r/delta_time=
0..40047]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt1r/delta_time=
0..40047]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt1r/delta_time=
0..40047]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt1r/delta_time=
0..40047]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt1r/anom_ssegs/anom_sseg_time =
0..7255
]
-
anom_sseg_lat[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt1r/anom_ssegs/anom_sseg_time=
0..7255]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
gt2r(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce2
(Type is String)
-
atlas_beam_type:
strong
(Type is String)
-
groundtrack_id:
gt2r
(Type is String)
-
atmosphere_profile:
profile_2
(Type is String)
-
atlas_spot_number:
3
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt2r/delta_time =
0..36039
]
-
segment_lon[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt2r/delta_time=
0..36039]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt2r/delta_time=
0..36039]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt2r/delta_time=
0..36039]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt2r/delta_time=
0..36039]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt2r/delta_time=
0..36039]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt2r/delta_time=
0..36039]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt2r/delta_time=
0..36039]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt2r/delta_time=
0..36039]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt2r/anom_ssegs/anom_sseg_time =
0..6475
]
-
anom_sseg_lat[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt2r/anom_ssegs/anom_sseg_time=
0..6475]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
gt1l(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce3
(Type is String)
-
atlas_beam_type:
weak
(Type is String)
-
groundtrack_id:
gt1l
(Type is String)
-
atmosphere_profile:
profile_1
(Type is String)
-
atlas_spot_number:
6
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt1l/delta_time =
0..9875
]
-
segment_lon[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt1l/delta_time=
0..9875]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt1l/delta_time=
0..9875]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt1l/delta_time=
0..9875]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt1l/delta_time=
0..9875]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt1l/delta_time=
0..9875]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt1l/delta_time=
0..9875]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt1l/delta_time=
0..9875]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt1l/delta_time=
0..9875]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt1l/anom_ssegs/anom_sseg_time =
0..2182
]
-
anom_sseg_lat[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt1l/anom_ssegs/anom_sseg_time=
0..2182]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
quality_assessment(Type is Group)
gt3l(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce1
(Type is String)
-
atlas_beam_type:
weak
(Type is String)
-
groundtrack_id:
gt3l
(Type is String)
-
atmosphere_profile:
profile_3
(Type is String)
-
atlas_spot_number:
2
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt3l/delta_time =
0..10472
]
-
segment_lon[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt3l/delta_time=
0..10472]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt3l/delta_time=
0..10472]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt3l/delta_time=
0..10472]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt3l/delta_time=
0..10472]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt3l/delta_time=
0..10472]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt3l/delta_time=
0..10472]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt3l/delta_time=
0..10472]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt3l/delta_time=
0..10472]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt3l/anom_ssegs/anom_sseg_time =
0..2338
]
-
anom_sseg_lat[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt3l/anom_ssegs/anom_sseg_time=
0..2338]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
gt2l(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce2
(Type is String)
-
atlas_beam_type:
weak
(Type is String)
-
groundtrack_id:
gt2l
(Type is String)
-
atmosphere_profile:
profile_2
(Type is String)
-
atlas_spot_number:
4
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt2l/delta_time =
0..9826
]
-
segment_lon[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt2l/delta_time=
0..9826]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt2l/delta_time=
0..9826]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt2l/delta_time=
0..9826]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt2l/delta_time=
0..9826]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt2l/delta_time=
0..9826]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt2l/delta_time=
0..9826]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt2l/delta_time=
0..9826]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt2l/delta_time=
0..9826]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt2l/anom_ssegs/anom_sseg_time =
0..2376
]
-
anom_sseg_lat[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt2l/anom_ssegs/anom_sseg_time=
0..2376]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
ancillary_data(Type is Group)
-
attributes
-
data_rate:
Data within this group pertain to the granule in its entirety.
(Type is String)
-
description:
Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants.
(Type is String)
-
release[
0..0]
(Type is String)
-
attributes
-
long_name:
Release Number
(Type is String)
-
units:
1
(Type is String)
-
source:
Operations
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed.
(Type is String)
-
end_geoseg[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending Geolocation Segment
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The ending geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation.
(Type is String)
-
version[
0..0]
(Type is String)
-
attributes
-
long_name:
Version
(Type is String)
-
units:
1
(Type is String)
-
source:
Operations
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release.
(Type is String)
-
end_region[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending Region
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent.
(Type is String)
-
atlas_sdp_gps_epoch[
0..0]
(Type is Float64)
-
attributes
-
long_name:
ATLAS Epoch Offset
(Type is String)
-
units:
seconds since 1980-01-06T00:00:00.000000Z
(Type is String)
-
source:
Operations
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point.
(Type is String)
-
end_rgt[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending Reference Groundtrack
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
valid_min:
1
(Type is Int32)
-
valid_max:
1387
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle.
(Type is String)
-
end_delta_time[
0..0]
(Type is Float64)
-
attributes
-
long_name:
ATLAS End Time (Actual)
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
end_orbit[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending Orbit Number
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth.
(Type is String)
-
start_cycle[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Starting Cycle
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
99
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission.
(Type is String)
-
data_end_utc[
0..0]
(Type is String)
-
attributes
-
long_name:
End UTC Time of Granule (CCSDS-A, Actual)
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
UTC (in CCSDS-A format) of the last data point within the granule.
(Type is String)
-
control[
0..0]
(Type is String)
-
attributes
-
long_name:
Control File
(Type is String)
-
units:
1
(Type is String)
-
source:
Operations
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds.
(Type is String)
-
start_gpssow[
0..0]
(Type is Float64)
-
attributes
-
long_name:
Start GPS SOW of Granule (Actual)
(Type is String)
-
units:
seconds
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
GPS seconds-of-week of the first data point in the granule.
(Type is String)
-
granule_end_utc[
0..0]
(Type is String)
-
attributes
-
long_name:
End UTC Time of Granule (CCSDS-A, Requested)
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Requested end time (in UTC CCSDS-A) of this granule.
(Type is String)
-
end_cycle[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending Cycle
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
99
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission.
(Type is String)
-
granule_start_utc[
0..0]
(Type is String)
-
attributes
-
long_name:
Start UTC Time of Granule (CCSDS-A, Requested)
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Requested start time (in UTC CCSDS-A) of this granule.
(Type is String)
-
start_delta_time[
0..0]
(Type is Float64)
-
attributes
-
long_name:
ATLAS Start Time (Actual)
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
start_geoseg[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Starting Geolocation Segment
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The starting geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation.
(Type is String)
-
start_orbit[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Starting Orbit Number
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth.
(Type is String)
-
data_start_utc[
0..0]
(Type is String)
-
attributes
-
long_name:
Start UTC Time of Granule (CCSDS-A, Actual)
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
UTC (in CCSDS-A format) of the first data point within the granule.
(Type is String)
-
end_gpsweek[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Ending GPSWeek of Granule (Actual)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
GPS week number of the last data point in the granule.
(Type is String)
-
units:
weeks from 1980-01-06
(Type is String)
-
source:
Derived
(Type is String)
-
start_rgt[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Starting Reference Groundtrack
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
valid_min:
1
(Type is Int32)
-
valid_max:
1387
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle.
(Type is String)
-
end_gpssow[
0..0]
(Type is Float64)
-
attributes
-
long_name:
Ending GPS SOW of Granule (Actual)
(Type is String)
-
units:
seconds
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
GPS seconds-of-week of the last data point in the granule.
(Type is String)
-
start_region[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Starting Region
(Type is String)
-
units:
1
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent.
(Type is String)
-
start_gpsweek[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Start GPSWeek of Granule (Actual)
(Type is String)
-
units:
weeks from 1980-01-06
(Type is String)
-
source:
Derived
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
GPS week number of the first data point in the granule.
(Type is String)
-
inland_water(Type is Group)
-
n_coarse_iter[
0..8]
[
0..2]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Number of coarse iterations
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of coarse iteration steps for amplitude, mean height and standard deviation for surface iterated convolution.
(Type is String)
-
atm_window2[
0..0]
(Type is Float32)
-
attributes
-
long_name:
ATM Background Window Top
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Upper limit of height above coarse water surface height for atmospheric background count calculation.
(Type is String)
-
b1_sseg1[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Small Segment Bin Size
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Bin size to be used for histogramming of each small segment.
(Type is String)
-
s_seg1[
0..8]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Short Segment Length
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
valid_min:
1
(Type is Int32)
-
valid_max:
500
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Short segment size, indicating the number of along track signal photons per segment, operationally used as unit length over which to identify water surface height anomalies such as islands, bridges, etc.
(Type is String)
-
detrend_width[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Detrend Width
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of standard deviations +/- mode to include in detrend band.
(Type is String)
-
sub_max[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Subsurf Max Vertical Profile
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Maximum vertical profile of water subsurface to include in estimation of subsurface characteristics
(Type is String)
-
btm_upper_range_bins[
0..0]
(Type is Int8)
-
attributes
-
long_name:
bin count above apparent bottom height
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of bins above the long segment derived apparent bottom height over which to include member photons in short segment scale bottom finding adjustment.
(Type is String)
-
detection_ratio[
0..8]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
threshold adjustment
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Based on water body type, an adjustment to the threshold tests that must be passed in order to be identified as subsurface.
(Type is String)
-
lidar_coeff_alpha_unit_max[
0..8]
[
0..1]
(Type is Float32)
-
attributes
-
long_name:
Subsurface parameters
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Coefficient multiplier of unit exponential distribution and subsurface alpha_unit maximum values of iteration loops used in deconvolution, described in section 5.3.4 (A), based on water body type.
(Type is String)
-
bottom_find_method[
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
bathymetry identification method
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Based on water body type, the method by which to identify bathymetry in the subsurface.
(Type is String)
-
flag_meanings:
do_not_search_for_bathymetry do_not_apply_density_threshold_coupling apply_density_threshold_coupling
(Type is String)
-
flag_values:
0, 1, 2
(Type is Int8)
-
ref_dist_iw_bdy[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Reference Difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Maximum distance from a water body that a geosegment reference photon indicates the need for overlap testing each individual photon in the geosegment
(Type is String)
-
geoseg_edge_buffer[
0..8]
[
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
geosegment edge buffer
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of geosegments to include in the water surface calculation that are outside of both water body edges, as identified by reference photon location comparison to water body shapes.
(Type is String)
-
flag_meanings:
buffer_0 buffer_1 buffer_2 buffer_3 buffer_4 buffer_5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
min_mirror_cnt[
0..8]
[
0..4]
(Type is UInt16)
-
attributes
-
long_name:
minimum mirror count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-1
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Minimum number of signal photons required in a fully-filled long or very segment (consisting of only full member short segments) in each step of mirroring approach to estimating observed surface mean and standard deviation, designated by water body type.
(Type is String)
-
sseg_mode_freq_test[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Short Segment Mode Frequency Test
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Threshold to test number of short segment histogram modes against for inclusion or exclusion of short segment.
(Type is String)
-
type_to_process[
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Type to Process
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.7.1.2, Table 5-4
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Water body types that are to be processed by the ATL13 algorithm. This parameter is a rank 1 array of extent 9, with the body type digits coinciding with the array subscripts 1 through 9. Array elements are binary values, if 0 then process body type, 1 otherwise. Water body types are described in ATL13 chapter 4.7.1.2 and in Table 5-4.
(Type is String)
-
flag_meanings:
process_type otherwise
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
apply_mirror[
0..8]
(Type is Byte)
-
attributes
-
long_name:
Apply mirror scheme
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
valid_min:
0
(Type is Byte)
-
valid_max:
1
(Type is Byte)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
By water body type, designation as to whether or not to apply the multi-step mirroring scheme for surface estimation, where 0= do not apply mirroring and 1=process water body through mirroring steps.
(Type is String)
-
flag_meanings:
do_not_apply_mirroring process_through_mirroring
(Type is String)
-
flag_values:
0, 1
(Type is Byte)
-
sig_threshold[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Signal Confidence Threshold
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Minimum signal confidence required for photon to be included in analysis
(Type is String)
-
size_to_process[
0..8]
[
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Size to Process
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.7.1.2, Table 5-4
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Water body sizes that are to be processed by the ATL13 algorithm for each water body type. This parameter is a rank 2 array of size 9x9, where array subscripts 1 through 9, coincide with body type digits along columns, and body size digits along rows. Array elements are binary values, if 0 then process body size for that type, 1 otherwise. Water body sizes are described in ATL13 chapter 4.7.1.2 and in Table 5-4.
(Type is String)
-
flag_meanings:
process_size otherwise
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
lidar_coeff_alpha_unit_min[
0..8]
[
0..1]
(Type is Float32)
-
attributes
-
long_name:
Subsurface parameters
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Coefficient multiplier of unit exponential distribution and subsurface alpha_unit minimum values of iteration loops used in deconvolution, described in section 5.3.4 (A), based on water body type.
(Type is String)
-
aggregate_ratio[
0..8]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
bin count ratio
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Based on water body type, the required bin counts that must exist above and inclusive of a subsurface bin relative to the count of the entire column in order to qualify as possible bottom.
(Type is String)
-
lidar_coeff_alpha_unit_incr[
0..8]
[
0..1]
(Type is Float32)
-
attributes
-
long_name:
Subsurface parameters
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Iteration loop coefficient multiplier of unit exponential distribution and subsurface alpha_unit step increments used in deconvolution, described in section 5.3.4 (A), based on water body type.
(Type is String)
-
gauss_pk_thres[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Gaussian Peak Threshold
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Fraction of the peak amplitude above which Gaussian fit error analysis is executed (ie, calculate error on Gaussian only between the peak amplitude and gauss_pk_thres * peak)
(Type is String)
-
sseg_mode_cnt_test[
0..5]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short segment mode count test
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
valid_min:
7
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Threshold to test number of values contained in short segment histogram multimodes against for inclusion or exclusion of short segment
(Type is String)
-
flag_meanings:
sseg_stdev_thres_1 sseg_stdev_thres_2 sseg_stdev_thres_3 sseg_stdev_thres_4 sseg_stdev_thres_5 sseg_stdev_thres_6
(Type is String)
-
flag_values:
10, 10, 7, 7, 7, 7
(Type is Int8)
-
shore_buffer[
0..8]
[
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Shore buffer
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of near-shore short segments to ignore in analysis due to near-shore influences.
(Type is String)
-
flag_meanings:
buffer_0 buffer_1
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
h_mavg_c[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Num Depth Bins C
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of bins over which to calculate moving average
(Type is String)
-
bckgrd_threshold[
0..1]
(Type is Float32)
-
attributes
-
long_name:
Background Threshold
(Type is String)
-
units:
counts/sec
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Thresholds outside of which computed background is flagged (High, Low).
(Type is String)
-
n2[
0..8]
(Type is Float32)
-
attributes
-
long_name:
refractive index of water
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD Section 5.3.2 C
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Refractive index of water for a processed water body.
(Type is String)
-
f2_d_min[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Minimum Distance Thres
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Minimum distance threshold between photons required for inclusion in algorithm.
(Type is String)
-
max_gseg_search[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Max Geoseg Search Radius
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Maximum number of geosegments in either direction to search for reported water surface heights
(Type is String)
-
sseg_length_test[
0..8]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Short Segment Length Test
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
valid_min:
1.
(Type is Float32)
-
valid_max:
500.
(Type is Float32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Threshold by which to test the length of a short segment to determine anomalous or not anomalous, varying by water body type.
(Type is String)
-
h_mavg_a[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Num Depth Bins A
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of depth bins over which to compute H_mavg_a
(Type is String)
-
signal_window_bottom[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Signal Window Bottom
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Lower limit below coarse water surface to include photons for analysis.
(Type is String)
-
amp_mean_sig_min[
0..2]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
iteration loop minimum values
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Amplitude, mean, and sigma minimum values of iteration loops used in deconvolution described in section 5.3.4(B)
(Type is String)
-
bottom_sseg_mean_min[
0..0]
(Type is Int8)
-
attributes
-
long_name:
Minimum photon count for downscaling bottom
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Minimum number of photons required to calculate a valid mean while downscaling a found bottom into short segment rate output.
(Type is String)
-
amp_mean_sig_nskip[
0..8]
[
0..2]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Skip factor for surface iterated convolution
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of amplitude, mean height and standard deviation values skipped based on body type, within coarse iteration loops of amplitude, HM_unit and sigma_unit used in deconvolution described in section 5.3.4 (B), to determine an approximate error minimum location over the surface profile range.
(Type is String)
-
c_fresnel[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Fresnel Coeff
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Fresnel specular reflection coefficient @ 532 nm
(Type is String)
-
sseg_mode_spread_test[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Short Segment Mode Spread Test
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Threshold to test distance between short segment histogram multimodes against for inclusion or exclusion of short segment.
(Type is String)
-
anmly_test[
0..8]
[
0..11]
(Type is Float32)
-
attributes
-
long_name:
Anomaly Test
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Array containing threshold values against which to test segments for heights that are anomalous to the rest of the water surface. The anmly_test value is selected based on the corresponding length of the water body crossing, calculated in the code as iw_bdy_xlen_flag. The mode of each segment histogram will be tested against ht_water_coarse and marked as anomalous if the difference is greater than the anomaly test value associated with the segment crossing length.
(Type is String)
-
h_mavg_b[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Num Depth Bins B
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of depth bins over which to compute H_mavg_b
(Type is String)
-
limit_hist_depth[
0..8]
(Type is Byte)
-
attributes
-
long_name:
Limit histogram depth analysis
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
valid_min:
0
(Type is Byte)
-
valid_max:
1
(Type is Byte)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
By water body type, designation as to whether or not to limit the initial short segment histogram depth analysis by range_hist_depth, where 0= do not limit depth range and 1= limit the depth range consideration by range_hist_depth.
(Type is String)
-
flag_meanings:
do_not_limit_depth_range limit_depth_range
(Type is String)
-
flag_values:
0, 1
(Type is Byte)
-
b_long[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Long Bin Size
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Bin size to be used by which to establish a histogram of long segments.
(Type is String)
-
amp_mean_sig_incr[
0..2]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
iteration loop increments
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Iteration loop amplitude, mean, and sigma step increments used in deconvolution described in section 5.3.4(B)
(Type is String)
-
bin_detrend[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Detrend Bin Size
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Bin size used to establish a band of heights over which to determine the detrending equation.
(Type is String)
-
atm_window1[
0..0]
(Type is Float32)
-
attributes
-
long_name:
ATM Background Window Bottom
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Lower limit of height above coarse water surface height for atmospheric background count calculation.
(Type is String)
-
m_avg_d[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Num Depth Bins D
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of depth bins over which to compute P_ht_long_subsurf_mavg
(Type is String)
-
refr_idx_type[
0..8]
(Type is Int8)
-
attributes
-
long_name:
array index for refractive index of water
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD Section 5.3.2 C
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Array indices denoting refractive index of water for a processed water body.
(Type is String)
-
amp_mean_sig_max[
0..2]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
iteration loop maximum values
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Amplitude, mean, and sigma maximum values of iteration loops used in deconvolution described in section 5.3.4(B)
(Type is String)
-
l_surf[
0..8]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Long Surface Segment Size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
valid_min:
10
(Type is Int32)
-
valid_max:
5000
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long segment size, operationally used as unit length over which to detrend the water surface, characterize the surface, and deconvolve the instrument pulse and subsurface effects from the water surface response.
(Type is String)
-
signal_window_top[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Signal Window Top
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Upper limit above coarse water surface to include photons for analysis.
(Type is String)
-
btm_lower_range_bins[
0..0]
(Type is Int8)
-
attributes
-
long_name:
bin count below apparent bottom height
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Number of bins below the long segment derived apparent bottom height over which to include member photons in short segment scale bottom finding adjustment.
(Type is String)
-
lsbr_threshold[
0..0]
(Type is Float32)
-
attributes
-
long_name:
LSBR Threshold
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Threshold at which the LSBR indicates a significant transition from signal photon richness to noise.
(Type is String)
-
l_sub[
0..8]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Long subsurface segment size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
valid_min:
30
(Type is Int32)
-
valid_max:
15000
(Type is Int32)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long segment size, operationally used as unit length over which to characterize the subsurface, and deconvolve the instrument pulse and subsurface effects from the water surface response.
(Type is String)
-
b2_sseg1[
0..0]
(Type is Float32)
-
attributes
-
long_name:
Small Segment Height Bin Size
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Bin size to be used for histogramming of small segment heights.
(Type is String)
-
shore_buff_sseg_length[
0..0]
(Type is Int32)
-
attributes
-
long_name:
Shore buffer short segment length
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Maximum length of a short segment that can be marked as anomalous due to shore buffering.
(Type is String)
-
range_hist_depth[
0..8]
(Type is Float32)
-
attributes
-
long_name:
Limiting depth for histogram analysis
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2, Table 5-2
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Depth at which to limit the initial short segment histogram analysis, if utilized for the body type as designated by limit_hist_depth.
(Type is String)
gt3r(Type is Group)
-
attributes
-
description:
Contains per-beam data products.
(Type is String)
-
data_rate:
Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2).
(Type is String)
-
atlas_pce:
pce1
(Type is String)
-
atlas_beam_type:
strong
(Type is String)
-
groundtrack_id:
gt3r
(Type is String)
-
atmosphere_profile:
profile_3
(Type is String)
-
atlas_spot_number:
1
(Type is String)
-
sc_orientation:
Forward
(Type is String)
Dimensions:
[
/gt3r/delta_time =
0..43585
]
-
segment_lon[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat
(Type is String)
-
segment_lat[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lon
(Type is String)
-
delta_time[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
seconds since 2018-01-01
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed.
(Type is String)
-
coordinates:
segment_lat segment_lon
(Type is String)
-
sseg_sig_ph_cnt[
/gt3r/delta_time=
0..43585]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_dist_from_eq[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Distance from equator to segment start
(Type is String)
-
standard_name:
Along-track distance
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Along-track distance from the equator to the first photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_fit[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height Bias Fit Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
sseg_mean_lon[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean longitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_atm_atl09[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag Atm
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
10
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud flag from backscatter profile.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_ice[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
transect_id[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_type[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body type
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
inland_water_body_id[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lon[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_attenuation[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface attenuation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface attenuation was constrained during deconvolution by the minimum (initial) limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the subsurface attenuation fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for subsurface attenuation is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
segment_quality[
/gt3r/delta_time=
0..43585]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Geoid
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Applicable mean-tide system geoid value at reporting location for all short segment statistics. (see geoid_free2mean to convert to the tide-free system.)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_sseg_length[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Short Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Length of short segments flag. The flag is set as follows: 0 if sseg_length < 10 (meters); 1 if 10 <= sseg_length < 20 (meters); 2 if 20 <= sseg_length < 30 (meters); 3 if 30 <= sseg_length < 50 (meters); 4 if 50 <= sseg_length < 75 (meters); 5 if 75 <= sseg_length < 100 (meters); 6 if 100 <= sseg_length < 150 (meters); 7 if 150 <= sseg_length < 200 (meters); 8 if 200 <= sseg_length < 300 (meters); 9 if 300 <= sseg_length.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 below_threshold9 equal_to_or_above_threshold9
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_start_lon[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_equilibrium[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Equilibrium
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Long period equilibrium tide self-consistent with ocean tide model (+- 0.04 m). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_lseg_length[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Long Segment Length flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Long Segment Length flag is set based on the length of the long segment. The flag is set as follows: 0 if Lseg_length < 500 (meters); 1 if 50 <= Lseg_length < 1500 (meters); 2 if 150 <= Lseg_length < 3000 (meters); 3 if 3000 <= Lseg_length
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 above_threshold4
(Type is String)
-
flag_values:
0, 1, 2, 3
(Type is Int8)
-
significant_wave_ht[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
SWH
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Significant wave height
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lat[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Bottom latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cycle_number[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurface_backscat_ampltd[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface backscatter amplitude quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
valid_min:
-2
(Type is Int8)
-
valid_max:
2
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating whether or not the reported subsurface backscatter amplitude was constrained during deconvolution by the minimum limit in the possible range (QF=-1), the maximum limit in the possible range (QF = 1), or was allowed to settle on a solution within the possible range (QF=0). For analysis prior to deconvolution of the backscatter amplitude fit to the observations, the flag indicates whether the value determined by attempting to fit the observations was below (QF= -2), above (QF= 2), or within (QF=0) the possible range of expected values. When the default value for backscatter amplitude is chosen due to any condition other than those defined by an existing quality flag, QF=invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
obs_fit_below_range initial_limit within_range maximum_limit obs_fit_above_range
(Type is String)
-
flag_values:
-2, -1, 0, 1, 2
(Type is Int8)
-
water_depth[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water depth
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.4 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Depth from the mean water surface to detected bottom.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_bias_em[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
EM Bias Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
-3
(Type is Int8)
-
valid_max:
4
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
The Electromagnetic Bias flag is set based on threshold checks for the estimated electromagnetic height bias. The flag is set as follows: -3 if H_bias_EM < -0.10 (m); -2 if -0.10 < H_bias_EM < -0.05; -1 if -0.05 <= H_bias_EM < -0.01; 0 if -0.01 <= H_bias_EM < 0.01 (m); 1 if 0.01 <= H_bias_EM < 0.05; 2 if 0.05 <= H_bias_EM < 0.10; 3 if 0.10 < H_bias_EM; 4 if H_bias_EM is invalid.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 above_threshold6 invalid
(Type is String)
-
flag_values:
-3, -2, -1, 0, 1, 2, 3, 4
(Type is Int8)
-
segment_id_end[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
long_name:
Last ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Last ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_vlseg[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the very long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_apparent_ht[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Apparent height of the short segment, before adjustments are made by the algorithm, based on an average of heights within a designated range of the short segment mode.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
stdev_water_surf[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Derived standard deviation of water surface, calculated over long segments (when available) with result reported at each short segment location tag contained within.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_wind10_atl09[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height from ATL09 input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_iwp[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Inland Water Segment Processing Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the level of processing the inland water algorithm was able to perform based on the data available, ranging from one to 7.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
1_short_segment 2_short_segments 3_to_5_short_segments 6_to_7_short_segments 8_to_9_short_segments 10_to_29_short_segments at_least_30_short_segments
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
segment_podppd_flag[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
0
(Type is Int8)
-
long_name:
POD_PPD Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL02, ANC04, ANC05
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
7
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Composite POD/PPD flag that indicates the quality of input geolocation products for the utilized ATL03 segments on an ATL13 short segment output basis. A non-zero value may indicate that geolocation solutions are degraded or that ATLAS is within a calibration scan period (CAL). The ATL03 sigma values should indicate the degree of uncertainty associated with the degradation. Possible non-CAL values are: 0=NOMINAL; 1=POD_DEGRADE; 2=PPD_DEGRADE; 3=PODPPD_DEGRADE; possible CAL values are: 4=CAL_NOMINAL; 5=CAL_POD_DEGRADE; 6=CAL_PPD_DEGRADE; 7=CAL_PODPPD_DEGRADE;
(Type is String)
-
coordinates:
delta_time
(Type is String)
-
flag_meanings:
nominal pod_degrade ppd_degrade podppd_degrade cal_nominal cal_pod_degrade cal_ppd_degrade cal_podppd_degrade
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7
(Type is Int8)
-
qf_ht_adj[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Height adjustment Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (C)
(Type is String)
-
valid_min:
-4
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Flag representing the range of height, defined in 5.3.5 (C), which has been added to the apparent surface height due to frame of reference scaling during deconvolution analysis.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 below_threshold7 below_threshold8 equal_to_or_above_threshold8 invalid
(Type is String)
-
flag_values:
-4, -3, -2, -1, 0, 1, 2, 3, 4, 5
(Type is Int8)
-
segment_full_sat_fract[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Full Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be fully saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_id_beg[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
long_name:
First ATL03 Segment ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First ATL03 segment_id associated with the photons within this inland water segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_subsurf_anomaly[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Subsurface Anomaly Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD 5.3.4(A)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
3
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the likelihood that the bottom or other subsurface anomaly is bottom based on the threshold value at which an anomaly was found. 1 = Subsurface anomaly due to bottom likely; 2 = Subsurface signal may indicate bottom or other anomaly; 3 = Possible subsurface anomaly; invalid = No subsurface anomaly detected
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
bottom_likely bottom_or_other_anomaly possible_subsurface_anomaly
(Type is String)
-
flag_values:
1, 2, 3
(Type is Int8)
-
subsurface_attenuation[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface Attenuation
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Subsurface attenuation coefficient.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
layer_flag_atl09[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Consolidated cloud flag.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_region[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Body region
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
ATL13-created shapefile representing relevant bodies of water over which to implement the ATL13 water surface finding algorithm only within a region of processing interest.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_end_lat[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment ends. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
cloud_flag_asr_atl09[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
5
(Type is Int8)
-
contentType:
modelResult
(Type is String)
-
description:
Cloud probability from ASR.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5
(Type is Int8)
-
_FillValue:
127
(Type is Int8)
-
long_name:
Cloud Flag ASR
(Type is String)
-
ice_flag[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, section 5.2
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes likelihood of ice on water surface short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
no_ice ice
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
sseg_start_lat[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude at which the short segment begins. May be a signal or non-signal photon.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_ref_elev[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
elevation
(Type is String)
-
standard_name:
elevation
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Elevation of the unit pointing vector for the reference photon in the local ENU frame in radians. The angle is measured from east-north plane and positive towards up.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_apparent_stdev[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Apparent StDev
(Type is String)
-
units:
meters
(Type is String)
-
source:
section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of short segment photon height in the short segment with signal classification >= sig_threshold.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_ortho[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height EGM2008 converted from ellipsoidal height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
alpha_mle[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Maximum likelihood alpha
(Type is String)
-
units:
m^-1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Alpha calculated by maximum likelihood analysis of the subsurface profile range.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
rgt[
/gt3r/delta_time=
0..43585]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
ht_water_surf[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water surface height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Water surface height, reported for each short segment (default length = approximately 100 signal photons) with reference to WGS84 ellipsoid
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_near_sat_fract[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Near Saturation Fraction
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.2
(Type is String)
-
valid_min:
0.
(Type is Float32)
-
valid_max:
1.
(Type is Float32)
-
contentType:
qualityInformation
(Type is String)
-
description:
The fraction of pulses within the short segment determined to be nearly saturated based on ATL03 geosegment rate input.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_ht_water_surf[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
units:
1
(Type is String)
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height Error
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in heights reported in ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
bottom_lon[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of actual bottom location, based on the apparent bottom sseg_mean_lat / sseg_mean_lon location corrected for refraction effects.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_fit[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Goodness of fit bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Bias contribution from goodness of observation/system response fit. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
atl13refid[
/gt3r/delta_time=
0..43585]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_cloud[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Consolidated cloud flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL09
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow. From the ATL09 data closest to the segment time.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
likely_clear likely_cloudy
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
inland_water_body_source[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body source
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
1
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Source of Inland Water Body shape, where 1=HydroLAKES, 2=Global Lakes and Wetlands Database, 3=Named Marine Water Bodies, 4=GSHHG Shoreline, 5=Global River Widths from Landsat, 6=Reserved, 7=Reserved, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
HydroLAKES Global_Lakes_and_Wetlands_Database Named_Marine_Water_Bodies GSHHG_Shoreline Global_River_Widths_from_Landsat Reserved Reserved Reserved Reserved
(Type is String)
-
flag_values:
1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
sseg_length[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
standard_name:
Length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Distance from the first to the last photon in the short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_tide_earth_free2mean[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Earth Tide Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Segment rate value to convert solid earth tide from the tide-free system that was applied in ATL03 to photon heights to the ht_water_surf to the mean-tide system. Subtract value from ht_water_surf to reference it in the mean-tide system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_stdev_lseg[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
observed standard deviation quality flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Quality flag indicating the magnitude of standard deviation (SD) of observed detrended heights of the long segment to which the short segment belongs, where 0: SD < 0.5 (meters), 1: 0.5 <= SD < 1.5, 2: 1.5 <= SD < 2.5, 3: 2.5 <= SD < 3.5, 4: 3.5 <= SD < 4.5, 5: 4.5 <= SD < 5.5, 6: 5.5 <= SD < 6.5, 7: 6.5 <= SD < 7.5, 8: 7.5 <= SD < 8.5, 9: 8.5 <= SD. It is recommended that a user consider this flag in conjunction with the water body type and size to best determine if the observed surface standard deviation is reasonable or whether results should be considered questionable.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
SD_below_0.5 SD_below_1.5 SD_below_2.5 SD_below_3.5 SD_below_4.5 SD_below_5.5 SD_below_6.5 SD_below_7.5 SD_below_8.5 SD_greater_or_equal_to_8.5
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
segment_dem_source[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
valid_min:
0
(Type is Int32)
-
valid_max:
4
(Type is Int32)
-
contentType:
referenceInformation
(Type is String)
-
description:
Flag equal to the source of the selected photon (in hierarchy of Arctic/Global/MSS/Antarctic). Values: 0=None, 1=Arctic, 2=Global, 3=MSS, 4=Antarctic.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
none arctic global mss antarctic
(Type is String)
-
flag_values:
0, 1, 2, 3, 4
(Type is Int32)
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
dem source flag
(Type is String)
-
segment_fpb_correction[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
First photon bias correction
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
First photon bias correction. May be applied at user disrection by subtracting from mean height produts ht_ortho and ht_water_surf.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_azimuth[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Azimuth
(Type is String)
-
standard_name:
azimuth
(Type is String)
-
units:
radians
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
The direction, eastwards from north, of the laser beam vector as seen by an observer at the laser ground spot viewing toward the spacecraft (i.e., the vector from the ground to the spacecraft). When the spacecraft is precisely at the geodetic zenith, the value will be 99999 degrees.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
inland_water_body_size[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Body size
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Size of Inland Water Body, A=area, where 0=Not_Assigned, 1=A>10,000 sq km, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
not_assigned area_gt_10000 10000_gt_area_ge_1000 1000_gt_area_ge_100 100_gt_area_ge_10 10_gt_area_ge_1 1_gt_area_ge_0.1 0.01_gt_area Reserved Reserved
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
met_wind10_atl13[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Wind speed magnitude at 10m
(Type is String)
-
standard_name:
Wind speed
(Type is String)
-
units:
m/s
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Wind speed magnitude at 10m height, based on derived water surface wave height.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
snow_ice_atl09[
/gt3r/delta_time=
0..43585]
(Type is Int32)
-
attributes
-
_FillValue:
2147483647
(Type is Int32)
-
long_name:
Snow Ice Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
NOAA snow/ice flag scaled by ATL09 (0=ice-free water, 1=snow-free land, 2=snow, 3=ice, 127=invalid)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
ice_free_water snow_free_land snow ice invalid
(Type is String)
-
flag_values:
0, 1, 2, 3, 127
(Type is Int32)
-
segment_tide_ocean[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment Tide Ocean
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Ocean tides including diurnal and semi-diurnal (harmonic analysis (+-4 m)). Although available at short segment rate for all water body types, value is provide mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
err_slope_trk[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Slope Error
(Type is String)
-
units:
1
(Type is String)
-
source:
section 5.3.3 (C)
(Type is String)
-
contentType:
qualityInformation
(Type is String)
-
description:
Error included in segment_slope_trk_local.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_slope_trk_bdy[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Water Body Slope
(Type is String)
-
units:
m/m
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Along track water body surface slope, reported per short segment ID per water body.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
sseg_mean_lat[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean latitude of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_geoid_free2mean[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Geoid Free-to-Mean conversion
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL03 ATBD, Section 6.3.8
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Value to convert segment geoid heights from the mean-tide system to the tide-free system. Subtract this value from mean-tide system segment_geoid (on ATL13) to get geoid heights in the tide-free system. Applicable value at reporting location for all short segment statistics.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
qf_spec_width[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Spectral width Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 4.8.8
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
9
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Spectral moments width flag. The flag is set as follows: 0 when spec_width is invalid; 1 when 0 <= spec_width <= 0.2; 2 when 0.2 < spec_width <= 0.3; 3 when 0.3 < spec_width <= 0.4; 4 when 0.4 < spec_width <= 0.5; 5 when 0.5 < spec_width <= 0.6; 6 when 0.6 < spec_width <= 0.7; 7 when 0.7 < spec_width <= 0.8; 8 when 0.8 < spec_width <= 0.9; 9 when 0.9 < spec_width.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
invalid 0<=spec_width<=0.2 0.2<spec_width<=0.3 0.3<spec_width<=0.4 0.4<spec_width<=0.5 0.5<spec_width<=0.6 0.6<spec_width<=0.7 0.7<spec_width<=0.8 0.8<spec_width<=0.9 0.9<spec_width
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
(Type is Int8)
-
qf_bckgrd[
/gt3r/delta_time=
0..43585]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Background Quality Flag
(Type is String)
-
units:
1
(Type is String)
-
source:
Inland Water ATBD
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
6
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
flag_meanings:
equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6
(Type is String)
-
flag_values:
0, 1, 2, 3, 4, 5, 6
(Type is Int8)
-
sseg_mean_time[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Mean time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
Seconds since 2018-01-01
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Mean time of the signal-qualified photons in a short segment.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
met_ts_atl09[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Surface temperature
(Type is String)
-
standard_name:
temperature
(Type is String)
-
units:
K
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Surface (skin) temperature from ATL09.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_bias_em[
/gt3r/delta_time=
0..43585]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Electromagnetic bias
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Electromagnetic bias. (Has been applied to ht_ortho and _ht_water_surf products)
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dem_ht[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
DEM Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
DEM height relative to WGS-84 ellipsoid, reported at the short segment rate.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
subsurface_backscat_ampltd[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Subsurface backscatter amplitude
(Type is String)
-
units:
1
(Type is String)
-
source:
Section 5.3.4 (A)
(Type is String)
-
contentType:
modelResult
(Type is String)
-
description:
Subsurface backscatter amplitude, described in section 4.5.3, reported per long segment (default length = 10 short segments = approximately 1000 signal photons).
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
segment_dac[
/gt3r/delta_time=
0..43585]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment DAC
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATBD Section 5.3.5A
(Type is String)
-
contentType:
auxiliaryInformation
(Type is String)
-
description:
Dynamic atmospheric correction (DAC) includes inverted barometer (IB) effect (+- 5 cm). Although available at short segment rate for all water body types, value is provided mainly for transitional tidal and coastal water (types 6 and 7) and the largest lakes of Type 1 (~> 10,000 km2) for user's discretion.
(Type is String)
-
coordinates:
delta_time segment_lat segment_lon
(Type is String)
-
anom_ssegs(Type is Group)
Dimensions:
[
/gt3r/anom_ssegs/anom_sseg_time =
0..8254
]
-
anom_sseg_lat[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
Latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Latitude of the short segment (mean of signal class >=2 ph Lats).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lon
(Type is String)
-
anom_sseg_time[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
Delta Time
(Type is String)
-
standard_name:
time
(Type is String)
-
units:
sec
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
physicalMeasurement
(Type is String)
-
description:
Time of the short segment (mean of signal class >=2 ph time).
(Type is String)
-
coordinates:
anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_lon[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
Longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Longitude of the short segment (mean of signal class >=2 ph Lons).
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat
(Type is String)
-
transect_id[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Transect ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.2 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Transect within a water body to which the short segment rate output belongs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
cycle_number[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Int8)
-
attributes
-
long_name:
Cycle Number
(Type is String)
-
units:
counts
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
50
(Type is Int8)
-
contentType:
referenceInformation
(Type is String)
-
description:
Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1,387 and adding the RGT value.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
rgt[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Int16)
-
attributes
-
long_name:
Reference Ground track
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL03
(Type is String)
-
valid_min:
1
(Type is Int16)
-
valid_max:
1387
(Type is Int16)
-
contentType:
referenceInformation
(Type is String)
-
description:
The reference ground track (RGT) is the track on the Earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1,387 RGTs.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_sig_ph_cnt[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Int64)
-
attributes
-
_FillValue:
9223372036854775807
(Type is Int64)
-
long_name:
Signal photon count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5
(Type is String)
-
valid_min:
1
(Type is Int64)
-
valid_max:
500
(Type is Int64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Count of signal photons in short segment, full or partial.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_trigger_flag[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
[
/ds_anom_trigger=
0..8]
(Type is Int8)
-
attributes
-
_FillValue:
127
(Type is Int8)
-
long_name:
Anomalous classification flag
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
0
(Type is Int8)
-
valid_max:
1
(Type is Int8)
-
contentType:
qualityInformation
(Type is String)
-
description:
Nine element array describing justification for short segment classification as anomalous, where for each element 0 = not triggered as anomalous and 1 = triggered as anomalous due to any of the following causes: [element 1=coarse ht difference, element 2=abnormal length, element 3= histogram mode spread, element 4=histogram mode count, element 5=histogram mode intensity, element 6=invalid long segment, element 7=shore buffer designation, element 8=insufficient signal phs, element 9=transect coarse water height unavailable against which to test short segment height]
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
flag_meanings:
not_triggered_as_anomalous triggered_as_anomalous
(Type is String)
-
flag_values:
0, 1
(Type is Int8)
-
anom_sseg_stdev[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Segment standard deviation
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Standard deviation of anomalous short segment photon height in the anomalous short segment with signal classification >= 2.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_ht_delta[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Height difference
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height difference between anom_sseg_mode of the anomalous short segment and the transect coarse_transect_ht.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_length[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
_FillValue:
1.7976931348623157e+308
(Type is Float64)
-
long_name:
Segment length
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Length of the short segment, based on end points computed by the average of sseg_endpoint_avg_n signal photons.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lon[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
End longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End longitude of the anomalous short segment, based on the average longitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
coarse_transect_ht[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Coarse water height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Coarse water height of transect.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
atl13refid[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Int64)
-
attributes
-
_FillValue:
0
(Type is Int64)
-
long_name:
ATL13 Reference ID
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.1 (C)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Unique aggregate reference number for each shape in the ATL13 Inland Water Body Mask, where digit 1 = type, digit 2 = size, digit 3 = source, and digits 4-10 = shape id.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mode[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Anomalous mode bin height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Height of anomalous short segment as determined by histogram bin mode.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_quality[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
[
/ds_sseg_quality=
0..3]
(Type is Int32)
-
attributes
-
long_name:
Segment quality group count
(Type is String)
-
units:
1
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Four-element array of describing, for each anomalous short segment n, the count of photons qualifying in each quality group. (n,1) = nominal, (n,2) = possible afterpulse, (n,3) = possible impulse response effect, (n,4) = possible TEP
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
_FillValue:
2147483647
(Type is Int32)
-
anom_sseg_start_lon[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
Start longitude
(Type is String)
-
standard_name:
longitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-180.
(Type is Float64)
-
valid_max:
180.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start longitude of the anomalous short segment, based on the average longitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_mean_ht_ortho[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float32)
-
attributes
-
_FillValue:
3.402823466e+38
(Type is Float32)
-
long_name:
Orthometric Height
(Type is String)
-
units:
meters
(Type is String)
-
source:
ATL13 ATBD, Section 5.3.5 (A)
(Type is String)
-
contentType:
referenceInformation
(Type is String)
-
description:
Orthometric height of anomalous short segment as determined by the mean of photon orthometric heights in the anomalous short segment with signal classification >2
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_start_lat[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
Start latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
Start latitude of the anomalous short segment, based on the average latitude of the first sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
-
anom_sseg_end_lat[
/gt3r/anom_ssegs/anom_sseg_time=
0..8254]
(Type is Float64)
-
attributes
-
long_name:
End latitude
(Type is String)
-
standard_name:
latitude
(Type is String)
-
units:
degrees
(Type is String)
-
source:
ATL13 ATBD, Table 5-4b
(Type is String)
-
valid_min:
-90.
(Type is Float64)
-
valid_max:
90.
(Type is Float64)
-
contentType:
referenceInformation
(Type is String)
-
description:
End latitude of the anomalous short segment, based on the average latitude of the last sseg_endpoint_avg_n signal photons in the segment.
(Type is String)
-
coordinates:
anom_sseg_time anom_sseg_lat anom_sseg_lon
(Type is String)
|
