/gt1r/bckgrd_atlas/bckgrd_int_height[
delta_time=
0
..89489]
(Type is Float32)
-
attributes
-
contentType:
modelResult
-
coordinates:
delta_time
-
description:
The height of the altimetric range window. This is the height over which the 50-shot sum is generated. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array.
-
long_name:
Altimetric range window width
-
source:
ATL03 ATBD Section 7.3
-
units:
meters
/gt1r/bckgrd_atlas/delta_time[
delta_time=
0
..89489]
(Type is Float64)
-
attributes
-
description:
Elapsed GPS Seconds from the ATLAS SDP GPS Epoch, referenced to the start of the 50-shot sum. This is based on every fiftieth laser fire time, which leads to a very close alignment with major frame boundaries (+/- 1 shot). 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.
-
long_name:
Time at the start of ATLAS 50-shot sum
-
source:
ATL02
-
standard_name:
time
-
units:
seconds since 2018-01-01
/gt1r/heights/lat_ph[
delta_time=
0
..4.10252E6]
(Type is Float64)
-
attributes
-
coordinates:
delta_time lon_ph
-
description:
Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point.
-
long_name:
Latitude
-
source:
ATL03g ATBD, Section 3.4
-
standard_name:
latitude
-
units:
degrees_north
-
valid_max:
90.
-
valid_min:
-90.
/gt1r/heights/delta_time[
delta_time=
0
..4.10252E6]
(Type is Float64)
-
attributes
-
contentType:
referenceInformation
-
coordinates:
lat_ph lon_ph
-
description:
The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. 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.
-
long_name:
Elapsed GPS seconds
-
source:
Operations
-
standard_name:
time
-
units:
seconds since 2018-01-01
