| HDF5_OBJ_FULLPATH: | H5_GLOBAL |
| granule_type: | ATL04 |
| short_name: | ATL04 |
| level: | 2A |
| description: | Along-track normalized relative backscatter profiles at full instrument resolution (normally 25 times per second for ~30m vertical bins). Includes calibration coefficient values calculated in the polar region. |
| contributor_name: | Thomas E Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) |
| contributor_role: | Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer |
| Conventions: | CF-1.6 |
| date_type: | UTC |
| featureType: | trajectory |
| geospatial_lat_units: | degrees_north |
| geospatial_lon_units: | degrees_east |
| identifier_product_doi: | 10.5067/ATLAS/ATL04.001 |
| identifier_product_doi_authority: | http://dx.doi.org |
| identifier_product_type: | ATL04 |
| license: | Data may not be reproduced or distributed without including the citation for this product included in this metadata. Data may not be distributed in an altered form without the written permission of the ICESat-2 Science Project Office at NASA/GSFC. |
| naming_authority: | http://dx.doi.org |
| spatial_coverage_type: | Horizontal |
| standard_name_vocabulary: | CF-1.6 |
| time_type: | CCSDS UTC-A |
| date_created: | 2018-01-17T03:29:38.000000Z |
| hdfversion: | HDF5 1.8.18 |
| history: | 2018-01-17T03:29:38.000000Z;A67E7ACC-34AE-406F-DFF5-1CDB5944AD88;Created by PGE atlas_l2a_atm Version 3.1 |
| identifier_file_uuid: | A67E7ACC-34AE-406F-DFF5-1CDB5944AD88 |
| identifier_product_format_version: | 3.1 |
| time_coverage_duration: | 801.12002301216125 |
| time_coverage_end: | 2015-10-28T06:29:30.288021Z |
| time_coverage_start: | 2015-10-28T06:16:09.167998Z |
| asas_release: | ASAS v4.1 |
| geospatial_lat_min: | -0.0012902707602664538 |
| geospatial_lon_min: | -170.88174733051255 |
| geospatial_lat_max: | 49.78264272926922 |
| geospatial_lon_max: | -162.74654264353322 |
| publisher_name: | NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center |
| publisher_email: | nsidc@nsidc.org |
| publisher_url: | http://nsidc.org/daac/ |
| title: | ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles |
| identifier_file_product_type: | ATL04 |
| institution: | National Aeronautics and Space Administration (NASA) |
| creator_name: | GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System |
| summary: | The purpose of ATL04 is to provide normalized relative backscatter and ancillary meteorological and atmosphere data that will be used by to create the upstream ATL09 product. |
| keywords: | EARTH SCIENCE > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > NONE > NONE > NONE |
| keywords_vocabulary: | NASA/GCMD Science Keywords |
| citation: | Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center. |
| processing_level: | 2A |
| references: | http://nsidc.org/data/icesat2/data.html |
| project: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| instrument: | ATLAS > Advanced Topographic Laser Altimeter System |
| platform: | ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 |
| source: | Spacecraft |
| /orbit_info/cycle_number: | Array of 16 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/cycle_number units: 1 contentType: referenceInformation long_name: Cycle Number description: A count of the number of exact repeats of this reference orbit. source: Operations coordinates: delta_time valid_min: 0 valid_max: 50 |
| /orbit_info/delta_time: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/delta_time units: seconds since 2018-01-01 contentType: referenceInformation long_name: Elapsed GPS seconds standard_name: time 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. source: Operations CLASS: DIMENSION_SCALE |
| /orbit_info/orbit_number: | Array of 16 bit Unsigned integers [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/orbit_number units: 1 contentType: referenceInformation long_name: Orbit Number description: Unique identifying number for each planned ICESat-2 orbit. source: Operations coordinates: delta_time valid_min: 1 valid_max: 65000 |
| /orbit_info/sc_orient: | Array of 16 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/sc_orient units: 1 contentType: referenceInformation long_name: Spacecraft Orientation description: This parameter tracks the spacecraft orientation between 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. source: POD/PPD coordinates: sc_orient_time flag_meanings: backward forward transition flag_values: 0, 1, 2 valid_min: 0 valid_max: 2 |
| /orbit_info/rgt: | Array of 16 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/rgt units: 1 contentType: referenceInformation long_name: Reference Ground track 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. source: Operations coordinates: delta_time valid_min: 1 valid_max: 1387 |
| /orbit_info/sc_orient_time: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /orbit_info/sc_orient_time units: seconds since 2018-01-01 contentType: referenceInformation long_name: Time of Last Spacecraft Orientation Change standard_name: time 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. source: POD/PPD coordinates: delta_time CLASS: DIMENSION_SCALE |
| /profile_1/backg_signal_max2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_signal_max2 units: counts contentType: modelResult long_name: Background signal max 2 description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/sig_count_med: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_count_med units: counts contentType: referenceInformation long_name: Count of Signal Heights - Medium description: Count of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_std_dev1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_std_dev1 units: counts contentType: modelResult long_name: Background standard deviation 1 description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/dem_flag: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/dem_flag _FillValue: 127 units: 1 contentType: referenceInformation long_name: DEM Source Flag description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude flag_meanings: none gimp gmted mss flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 |
| /profile_1/backg_max_bin1: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_max_bin1 units: counts contentType: modelResult long_name: Background max bin 1 description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/bckgrd_atlas/bckgrd_counts_reduced: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_counts_reduced units: counts long_name: ATLAS 50-shot background count - reduced description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. source: ATL03 ATBD Section 7.3 coordinates: delta_time contentType: modelResult |
| /profile_1/bckgrd_atlas/bckgrd_counts: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_counts units: counts contentType: modelResult long_name: ATLAS 50-shot background count description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_1/bckgrd_atlas/delta_time: | Array of 64 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Derived via Time Tagging coordinates: delta_time CLASS: DIMENSION_SCALE NAME: profile_1/bckgrd_atlas/delta_time |
| /profile_1/bckgrd_atlas/bckgrd_hist_top: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_hist_top units: meters contentType: modelResult long_name: Top of the altimetric range window description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_1/bckgrd_atlas/bckgrd_int_height: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_int_height units: meters contentType: modelResult long_name: Altimetric range window width 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. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_1/bckgrd_atlas/bckgrd_int_height_reduced: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_int_height_reduced units: meters contentType: modelResult long_name: Altimetric range window height - reduced description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_1/bckgrd_atlas/bckgrd_rate: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/bckgrd_rate units: counts / second contentType: modelResult long_name: Background count rate based on the ATLAS 50-shot sum description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_1/bckgrd_atlas/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_1/bckgrd_atlas/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time |
| /profile_1/sig_count_low: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_count_low units: counts contentType: referenceInformation long_name: Count of Signal Heights - Low description: Count of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_method1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_method1 units: counts contentType: modelResult long_name: Background method 1 description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/sig_h_sdev_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_sdev_hi _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -High description: SDev of the heights of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/dtime_fac1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/dtime_fac1 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor1 description: Dead time correction factor for surface signal computed from radiometric lookup table. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/atm_tw_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/atm_tw_top units: meters contentType: referenceInformation long_name: Atmospheric Telemetry Window Top description: The geolocated ellipsoidal height at the top of the Atmospheric range window source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/sig_h_mean_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_mean_hi contentType: referenceInformation long_name: Mean of SignalHeights - High description: Mean height of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude _FillValue: 3.402823466e+38 units: meters |
| /profile_1/beam_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/beam_azimuth _FillValue: 3.402823466e+38 units: degrees_east contentType: referenceInformation long_name: beam azimuth description: Beam azimuth source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/range_to_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/range_to_top units: meters contentType: referenceInformation long_name: Range description: Range from the spacecraft to the top of the atmosphere range window. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/solar_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/solar_azimuth units: degrees_east contentType: referenceInformation long_name: solar azimuth description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/longitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/longitude units: degrees_east contentType: referenceInformation long_name: Longitude of the ATM histogram standard_name: longitude description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_1/backg_max_bin2: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_max_bin2 units: counts contentType: modelResult long_name: Background max bin 2 description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/latitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/latitude units: degrees_north contentType: referenceInformation long_name: Latitude of the ATM histogram standard_name: latitude description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. |
| /profile_1/surf_type: | Array of 16 bit Integers [ = 0..20026][ = 0..4] HDF5_OBJ_FULLPATH: /profile_1/surf_type units: 1 contentType: referenceInformation long_name: Surface Type description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. source: ATL03 ATBD, Section 4 coordinates: delta_time, latitude, longitude flag_meanings: not_type is_type flag_values: 0, 1 valid_min: 0 valid_max: 1 |
| /profile_1/atm_rw_width_m: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/atm_rw_width_m units: seconds contentType: referenceInformation long_name: Atmospheric Range Window Width description: The range, in meters, from the Atmospheric range window start to the range window stop. source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_method3: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_method3 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Background method 3 description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/surf_type_igbp: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/surf_type_igbp units: 1 long_name: IGBP Surface Type description: IGBP Surface Type source: Atmosphere ATBD, IGBP Surface Type coordinates: delta_time, latitude, longitude contentType: referenceInformation |
| /profile_1/sig_h_mean_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_mean_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signa Heightsl - Med description: Mean height of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_signal_max1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_signal_max1 units: counts long_name: Background signal max 1 description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude contentType: modelResult |
| /profile_1/dem_h: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/dem_h _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: DEM Height description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/tx_pulse_energy: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/tx_pulse_energy units: Joules contentType: referenceInformation long_name: Transmit Pulse Energy description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. source: ATL02 ATBD, Section 7.2 coordinates: delta_time, latitude, longitude |
| /profile_1/surface_height: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/surface_height _FillValue: 3.402823466e+38 units: meters contentType: modelResult long_name: Surface height description: Height of the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_1/nrb_profile: | Array of 32 bit Reals [ = 0..20026][ = 0..699] HDF5_OBJ_FULLPATH: /profile_1/nrb_profile _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB Profile description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_mean2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_mean2 units: counts contentType: modelResult long_name: Signal mean description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/prof_dist_y: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/prof_dist_y units: meters contentType: referenceInformation long_name: Across Track Distance from RGT description: Across-Track distance from the reference ground track. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/beam_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/beam_elevation _FillValue: 3.402823466e+38 units: degrees contentType: referenceInformation long_name: beam elevation description: Beam elevation source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/delta_time_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/delta_time_end units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval end time standard_name: time description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is 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. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/cal_ozone_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_ozone_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Ozone transmission used description: Ozone transmission term used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/cal_c_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_c_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: total transmission used description: The total transmission used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/longitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/longitude units: degrees_east contentType: modelResult long_name: Calibration interval start longitude standard_name: longitude description: Start Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_1/calibration/latitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/latitude_end units: degrees_north contentType: modelResult long_name: Calibration interval end latitude description: Stop Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -90. valid_max: 90. |
| /profile_1/calibration/latitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/latitude units: degrees_north long_name: Calibration interval start Latitude standard_name: latitude description: Start Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. contentType: modelResult |
| /profile_1/calibration/cal_molec: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_molec _FillValue: 3.402823466e+38 units: m-1 sr-1 contentType: modelResult long_name: Molecular Backscatter used description: Molecular Backscatter value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/cal_c: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_c _FillValue: 3.402823466e+38 units: Photons*m^3 *sr / J contentType: modelResult long_name: Calculated Calibration constant description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/delta_time: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval start time standard_name: time 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. source: Derived via Time Tagging coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_1/calibration/cal_con: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_con _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Calibration Confidence description: Calibration Confidence source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/cal_nrb: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/cal_nrb _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB value used description: NRB value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/calibration/longitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_1/calibration/longitude_end units: degrees_east contentType: modelResult long_name: Calibration interval end longitude description: Stop Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -180. valid_max: 180. |
| /profile_1/segment_id: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/segment_id units: 1 contentType: referenceInformation long_name: along-track segment ID number. description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. source: ATL03 ATBD, Section 3.1 coordinates: delta_time, latitude, longitude |
| /profile_1/surface_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/surface_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Surface bin description: Vertially aligned, NRB bin number of the detected surface return. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_1/solar_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/solar_elevation units: degrees contentType: referenceInformation long_name: solar elevation description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/sig_count_hi: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_count_hi units: counts contentType: referenceInformation long_name: Count of Signa Heightsl - High description: Count of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/dtime_fac2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/dtime_fac2 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor2 description: Dead time correction factor for surface signal computed from ATBD equation 2.1. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_1/prof_dist_x: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/prof_dist_x units: meters contentType: referenceInformation long_name: Along Track Distance description: Along-track distance from the equator crossing. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/delta_time: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Atmosphere ATBD coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_1/backg_std_dev2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_std_dev2 units: counts contentType: modelResult long_name: Background standard deviation 2 description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/backg_method2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/backg_method2 units: counts contentType: modelResult long_name: Background method 2 description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_1/sc_alt: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sc_alt units: meters contentType: physicalMeasurement long_name: Altitude description: Height of the spacecraft above the WGS84 ellipsoid. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_1/sig_h_sdev_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_sdev_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -Low description: SDev of the heights of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/sig_h_mean_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_mean_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signal Heights - Low description: Mean height of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/sig_h_sdev_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/sig_h_sdev_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signa Heights -Med description: SDev of the heights of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_1/nrb_bot_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/nrb_bot_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: NRB Profile bottom valid bin description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_1/surface_sig: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/surface_sig units: counts contentType: modelResult long_name: Surface signal count description: Number of photons in the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_1/nrb_top_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_1/nrb_top_bin _FillValue: 2147483647 units: counts contentType: modelResult long_name: NRB Profile top valid bin description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /ds_surf_type: | Array of 32 bit Integers [ = 0..4] HDF5_OBJ_FULLPATH: /ds_surf_type units: 1 contentType: auxiliaryInformation long_name: Surface Type Dimension Scale description: Dimension scale indexing the surface type array. Index=1 corresponds to Land; index = 2 corresponds to Ocean; Index = 3 corresponds to SeaIce; Index=4 corresponds to LandIce; Index=5 corresponds to InlandWater flag_meanings: land ocean seaice landice inland_water flag_values: 1, 2, 3, 4, 5 valid_min: 1 valid_max: 5 CLASS: DIMENSION_SCALE NAME: /ds_surf_type |
| /profile_3/backg_signal_max2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_signal_max2 units: counts contentType: modelResult long_name: Background signal max 2 description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/sig_count_med: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_count_med units: counts contentType: referenceInformation long_name: Count of Signal Heights - Medium description: Count of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_std_dev1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_std_dev1 units: counts contentType: modelResult long_name: Background standard deviation 1 description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/dem_flag: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/dem_flag _FillValue: 127 units: 1 contentType: referenceInformation long_name: DEM Source Flag description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude flag_meanings: none gimp gmted mss flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 |
| /profile_3/backg_max_bin1: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_max_bin1 units: counts contentType: modelResult long_name: Background max bin 1 description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/bckgrd_atlas/bckgrd_counts_reduced: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_counts_reduced units: counts long_name: ATLAS 50-shot background count - reduced description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. source: ATL03 ATBD Section 7.3 coordinates: delta_time contentType: modelResult |
| /profile_3/bckgrd_atlas/bckgrd_counts: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_counts units: counts contentType: modelResult long_name: ATLAS 50-shot background count description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_3/bckgrd_atlas/delta_time: | Array of 64 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Derived via Time Tagging coordinates: delta_time CLASS: DIMENSION_SCALE NAME: profile_3/bckgrd_atlas/delta_time |
| /profile_3/bckgrd_atlas/bckgrd_hist_top: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_hist_top units: meters contentType: modelResult long_name: Top of the altimetric range window description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_3/bckgrd_atlas/bckgrd_int_height: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_int_height units: meters contentType: modelResult long_name: Altimetric range window width 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. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_3/bckgrd_atlas/bckgrd_int_height_reduced: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_int_height_reduced units: meters contentType: modelResult long_name: Altimetric range window height - reduced description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_3/bckgrd_atlas/bckgrd_rate: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/bckgrd_rate units: counts / second contentType: modelResult long_name: Background count rate based on the ATLAS 50-shot sum description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_3/bckgrd_atlas/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_3/bckgrd_atlas/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time |
| /profile_3/sig_count_low: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_count_low units: counts contentType: referenceInformation long_name: Count of Signal Heights - Low description: Count of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_method1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_method1 units: counts contentType: modelResult long_name: Background method 1 description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/sig_h_sdev_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_sdev_hi _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -High description: SDev of the heights of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/dtime_fac1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/dtime_fac1 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor1 description: Dead time correction factor for surface signal computed from radiometric lookup table. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/atm_tw_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/atm_tw_top units: meters contentType: referenceInformation long_name: Atmospheric Telemetry Window Top description: The geolocated ellipsoidal height at the top of the Atmospheric range window source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/sig_h_mean_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_mean_hi contentType: referenceInformation long_name: Mean of SignalHeights - High description: Mean height of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude _FillValue: 3.402823466e+38 units: meters |
| /profile_3/beam_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/beam_azimuth _FillValue: 3.402823466e+38 units: degrees_east contentType: referenceInformation long_name: beam azimuth description: Beam azimuth source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/range_to_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/range_to_top units: meters contentType: referenceInformation long_name: Range description: Range from the spacecraft to the top of the atmosphere range window. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/solar_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/solar_azimuth units: degrees_east contentType: referenceInformation long_name: solar azimuth description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/longitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/longitude units: degrees_east contentType: referenceInformation long_name: Longitude of the ATM histogram standard_name: longitude description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_3/backg_max_bin2: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_max_bin2 units: counts contentType: modelResult long_name: Background max bin 2 description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/latitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/latitude units: degrees_north contentType: referenceInformation long_name: Latitude of the ATM histogram standard_name: latitude description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. |
| /profile_3/surf_type: | Array of 16 bit Integers [ = 0..20026][ = 0..4] HDF5_OBJ_FULLPATH: /profile_3/surf_type units: 1 contentType: referenceInformation long_name: Surface Type description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. source: ATL03 ATBD, Section 4 coordinates: delta_time, latitude, longitude flag_meanings: not_type is_type flag_values: 0, 1 valid_min: 0 valid_max: 1 |
| /profile_3/atm_rw_width_m: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/atm_rw_width_m units: seconds contentType: referenceInformation long_name: Atmospheric Range Window Width description: The range, in meters, from the Atmospheric range window start to the range window stop. source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_method3: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_method3 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Background method 3 description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/surf_type_igbp: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/surf_type_igbp units: 1 long_name: IGBP Surface Type description: IGBP Surface Type source: Atmosphere ATBD, IGBP Surface Type coordinates: delta_time, latitude, longitude contentType: referenceInformation |
| /profile_3/sig_h_mean_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_mean_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signa Heightsl - Med description: Mean height of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_signal_max1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_signal_max1 units: counts long_name: Background signal max 1 description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude contentType: modelResult |
| /profile_3/dem_h: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/dem_h _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: DEM Height description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/tx_pulse_energy: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/tx_pulse_energy units: Joules contentType: referenceInformation long_name: Transmit Pulse Energy description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. source: ATL02 ATBD, Section 7.2 coordinates: delta_time, latitude, longitude |
| /profile_3/surface_height: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/surface_height _FillValue: 3.402823466e+38 units: meters contentType: modelResult long_name: Surface height description: Height of the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_3/nrb_profile: | Array of 32 bit Reals [ = 0..20026][ = 0..699] HDF5_OBJ_FULLPATH: /profile_3/nrb_profile _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB Profile description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_mean2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_mean2 units: counts contentType: modelResult long_name: Signal mean description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/prof_dist_y: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/prof_dist_y units: meters contentType: referenceInformation long_name: Across Track Distance from RGT description: Across-Track distance from the reference ground track. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/beam_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/beam_elevation _FillValue: 3.402823466e+38 units: degrees contentType: referenceInformation long_name: beam elevation description: Beam elevation source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/delta_time_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/delta_time_end units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval end time standard_name: time description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is 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. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/cal_ozone_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_ozone_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Ozone transmission used description: Ozone transmission term used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/cal_c_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_c_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: total transmission used description: The total transmission used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/longitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/longitude units: degrees_east contentType: modelResult long_name: Calibration interval start longitude standard_name: longitude description: Start Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_3/calibration/latitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/latitude_end units: degrees_north contentType: modelResult long_name: Calibration interval end latitude description: Stop Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -90. valid_max: 90. |
| /profile_3/calibration/latitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/latitude units: degrees_north long_name: Calibration interval start Latitude standard_name: latitude description: Start Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. contentType: modelResult |
| /profile_3/calibration/cal_molec: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_molec _FillValue: 3.402823466e+38 units: m-1 sr-1 contentType: modelResult long_name: Molecular Backscatter used description: Molecular Backscatter value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/cal_c: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_c _FillValue: 3.402823466e+38 units: Photons*m^3 *sr / J contentType: modelResult long_name: Calculated Calibration constant description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/delta_time: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval start time standard_name: time 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. source: Derived via Time Tagging coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_3/calibration/cal_con: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_con _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Calibration Confidence description: Calibration Confidence source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/cal_nrb: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/cal_nrb _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB value used description: NRB value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/calibration/longitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_3/calibration/longitude_end units: degrees_east contentType: modelResult long_name: Calibration interval end longitude description: Stop Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -180. valid_max: 180. |
| /profile_3/segment_id: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/segment_id units: 1 contentType: referenceInformation long_name: along-track segment ID number. description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. source: ATL03 ATBD, Section 3.1 coordinates: delta_time, latitude, longitude |
| /profile_3/surface_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/surface_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Surface bin description: Vertially aligned, NRB bin number of the detected surface return. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_3/solar_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/solar_elevation units: degrees contentType: referenceInformation long_name: solar elevation description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/sig_count_hi: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_count_hi units: counts contentType: referenceInformation long_name: Count of Signa Heightsl - High description: Count of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/dtime_fac2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/dtime_fac2 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor2 description: Dead time correction factor for surface signal computed from ATBD equation 2.1. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_3/prof_dist_x: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/prof_dist_x units: meters contentType: referenceInformation long_name: Along Track Distance description: Along-track distance from the equator crossing. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/delta_time: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Atmosphere ATBD coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_3/backg_std_dev2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_std_dev2 units: counts contentType: modelResult long_name: Background standard deviation 2 description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/backg_method2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/backg_method2 units: counts contentType: modelResult long_name: Background method 2 description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_3/sc_alt: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sc_alt units: meters contentType: physicalMeasurement long_name: Altitude description: Height of the spacecraft above the WGS84 ellipsoid. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_3/sig_h_sdev_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_sdev_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -Low description: SDev of the heights of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/sig_h_mean_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_mean_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signal Heights - Low description: Mean height of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/sig_h_sdev_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/sig_h_sdev_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signa Heights -Med description: SDev of the heights of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_3/nrb_bot_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/nrb_bot_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: NRB Profile bottom valid bin description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_3/surface_sig: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/surface_sig units: counts contentType: modelResult long_name: Surface signal count description: Number of photons in the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_3/nrb_top_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_3/nrb_top_bin _FillValue: 2147483647 units: counts contentType: modelResult long_name: NRB Profile top valid bin description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /quality_assessment/qa_granule_fail_reason: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /quality_assessment/qa_granule_fail_reason units: 1 contentType: qualityInformation description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD_Failure; 5=other failure. source: Operations flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE flag_values: 0, 1, 2, 3, 4, 5 valid_min: 0 valid_max: 5 long_name: Granule Failure Reason |
| /quality_assessment/qa_granule_pass_fail: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /quality_assessment/qa_granule_pass_fail units: 1 contentType: qualityInformation description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. source: Operations flag_meanings: PASS FAIL flag_values: 0, 1 valid_min: 0 valid_max: 1 long_name: Granule Pass Flag |
| /meteorology_molec_bkscat/met_tropt: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_tropt units: K contentType: referenceInformation long_name: blended_tropopause_temperature standard_name: temperature description: Tropopause temperature (k) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/mol_backs_folded: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/mol_backs_folded units: m-1 sr-1 contentType: modelResult long_name: Folded molecular transmission profile description: Folded molecular transmission profile, 30 m resolution, , m-1 sr-1; 20 km to -1 km (equation 3.17) source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/ozone_trans: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/ozone_trans units: 1 contentType: modelResult long_name: Ozone transmission profile description: Ozone transmission profile, 30 m resolution, 20 km to -1 km source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/molec_bkscat_p: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/molec_bkscat_p units: Pa contentType: modelResult long_name: Pressure profile description: Pressure profiles from 20 km to -1 km source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_t2m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_t2m units: K long_name: temperature_at_2m standard_name: temperature description: Temperature at 2m above the displacement height (K) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude contentType: referenceInformation |
| /meteorology_molec_bkscat/met_u2m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_u2m units: m s-1 contentType: referenceInformation long_name: Eastward_wind_at_2m standard_name: eastward_wind description: Eastward wind at 2m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_u10m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_u10m units: m s-1 contentType: referenceInformation long_name: Eastward_wind_at_10m standard_name: eastward_wind description: Eastward wind at 10m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/molec_trans: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/molec_trans units: 1 contentType: modelResult long_name: Molecular transmission profile description: Molecular transmission profile, 30 m resolution, 20 km to -1 km source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_cldprs: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_cldprs units: Pa contentType: referenceInformation long_name: cloud_top_pressure standard_name: pressure description: Pressure of the highest cloud top at this location from GEOS5 data source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_v50m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_v50m units: m s-1 contentType: referenceInformation long_name: northward_wind_at_50m standard_name: northward_wind description: Northward wind at 50m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_v10m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_v10m units: m s-1 contentType: referenceInformation long_name: Northward_wind_at_10m standard_name: northward_wind description: Northward wind at 10m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/longitude: | Array of 64 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/longitude units: degrees_east contentType: referenceInformation long_name: Longitude of the ATM histogram standard_name: longitude description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /meteorology_molec_bkscat/met_ps: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_ps units: Pa contentType: referenceInformation long_name: Surface Pressure standard_name: pressure description: Surface Pressure (Pa) source: GEOS5 FPIT 3D DFPITI3NVASM coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/latitude: | Array of 64 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/latitude units: degrees_north contentType: referenceInformation long_name: Latitude of the ATM histogram standard_name: latitude description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. |
| /meteorology_molec_bkscat/surf_type: | Array of 16 bit Integers [ = 0..801][ = 0..4] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/surf_type units: 1 contentType: referenceInformation long_name: Surface Type description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. source: ATL03 ATBD, Section 4 coordinates: delta_time, latitude, longitude flag_meanings: not_type is_type flag_values: 0, 1 valid_min: 0 valid_max: 1 |
| /meteorology_molec_bkscat/met_qv10m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_qv10m units: kg kg-1 contentType: referenceInformation long_name: specific_humidity_at_10m standard_name: specific_humidity description: Specific humidity at 10 m above the displacement height (Pa) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_tqi: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_tqi units: kg m2 contentType: referenceInformation long_name: cloud_ice description: Total column cloud ice (Kg/m2) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_t10m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_t10m units: K contentType: referenceInformation long_name: temperature_at_10m standard_name: temperature description: Temperature at 10m above the displacement height (K) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_tql: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_tql units: kg m2 contentType: referenceInformation long_name: cloud_liquid_water description: Total column cloud liquid water (kg/m2) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_v2m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_v2m units: m s-1 contentType: referenceInformation long_name: Northward_wind_at_2m standard_name: northward_wind description: Northward wind at 2m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_ts: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_ts units: K contentType: referenceInformation long_name: surface_temperature standard_name: temperature description: Surface skin temperature (K) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/segment_id: | Array of 32 bit Integers [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/segment_id units: 1 contentType: referenceInformation long_name: along-track segment ID number. description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. source: ATL03 ATBD, Section 3.1 coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_qv2m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_qv2m units: kg kg-1 contentType: referenceInformation long_name: specific_humidity_at_2m standard_name: specific_humidity description: Specific humidity at 2 m above the displacement height (Pa) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/delta_time: | Array of 64 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Atmosphere ATBD coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /meteorology_molec_bkscat/molec_bkscat_t: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/molec_bkscat_t units: degreesC contentType: modelResult long_name: Temperature profile description: Temperature profiles from 20 km to -1 km source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_u50m: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_u50m units: m s-1 contentType: referenceInformation long_name: Eastward_wind_at_50m standard_name: eastward_wind description: Eastward wind at 50m above the displacement height (m/s-1) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/met_troppb: | Array of 32 bit Reals [ = 0..801] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/met_troppb units: Pa contentType: referenceInformation long_name: blended_tropopause_pressure standard_name: pressure description: Blended tropopause pressure (pa) source: GEOS5 FPIT 2D DFPITT1NXSLV coordinates: delta_time, latitude, longitude |
| /meteorology_molec_bkscat/mol_backscatter: | Array of 32 bit Reals [ = 0..801][ = 0..699] HDF5_OBJ_FULLPATH: /meteorology_molec_bkscat/mol_backscatter units: m-1 sr-1 contentType: modelResult long_name: Molecular backscatter profile description: Molecular backscatter profile, 30 m resolution, 20 km to -1 km source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/backg_signal_max2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_signal_max2 units: counts contentType: modelResult long_name: Background signal max 2 description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/sig_count_med: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_count_med units: counts contentType: referenceInformation long_name: Count of Signal Heights - Medium description: Count of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_std_dev1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_std_dev1 units: counts contentType: modelResult long_name: Background standard deviation 1 description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/dem_flag: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/dem_flag _FillValue: 127 units: 1 contentType: referenceInformation long_name: DEM Source Flag description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude flag_meanings: none gimp gmted mss flag_values: 0, 1, 2, 3 valid_min: 0 valid_max: 3 |
| /profile_2/backg_max_bin1: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_max_bin1 units: counts contentType: modelResult long_name: Background max bin 1 description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/bckgrd_atlas/bckgrd_counts_reduced: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_counts_reduced units: counts long_name: ATLAS 50-shot background count - reduced description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. source: ATL03 ATBD Section 7.3 coordinates: delta_time contentType: modelResult |
| /profile_2/bckgrd_atlas/bckgrd_counts: | Array of 32 bit Integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_counts units: counts contentType: modelResult long_name: ATLAS 50-shot background count description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_2/bckgrd_atlas/delta_time: | Array of 64 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Derived via Time Tagging coordinates: delta_time CLASS: DIMENSION_SCALE NAME: profile_2/bckgrd_atlas/delta_time |
| /profile_2/bckgrd_atlas/bckgrd_hist_top: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_hist_top units: meters contentType: modelResult long_name: Top of the altimetric range window description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_2/bckgrd_atlas/bckgrd_int_height: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_int_height units: meters contentType: modelResult long_name: Altimetric range window width 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. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_2/bckgrd_atlas/bckgrd_int_height_reduced: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_int_height_reduced units: meters contentType: modelResult long_name: Altimetric range window height - reduced description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_2/bckgrd_atlas/bckgrd_rate: | Array of 32 bit Reals [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/bckgrd_rate units: counts / second contentType: modelResult long_name: Background count rate based on the ATLAS 50-shot sum description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. source: ATL03 ATBD Section 7.3 coordinates: delta_time |
| /profile_2/bckgrd_atlas/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..160207] HDF5_OBJ_FULLPATH: /profile_2/bckgrd_atlas/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time |
| /profile_2/sig_count_low: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_count_low units: counts contentType: referenceInformation long_name: Count of Signal Heights - Low description: Count of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_method1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_method1 units: counts contentType: modelResult long_name: Background method 1 description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/sig_h_sdev_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_sdev_hi _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -High description: SDev of the heights of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/dtime_fac1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/dtime_fac1 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor1 description: Dead time correction factor for surface signal computed from radiometric lookup table. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/atm_tw_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/atm_tw_top units: meters contentType: referenceInformation long_name: Atmospheric Telemetry Window Top description: The geolocated ellipsoidal height at the top of the Atmospheric range window source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/sig_h_mean_hi: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_mean_hi contentType: referenceInformation long_name: Mean of SignalHeights - High description: Mean height of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude _FillValue: 3.402823466e+38 units: meters |
| /profile_2/beam_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/beam_azimuth _FillValue: 3.402823466e+38 units: degrees_east contentType: referenceInformation long_name: beam azimuth description: Beam azimuth source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/range_to_top: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/range_to_top units: meters contentType: referenceInformation long_name: Range description: Range from the spacecraft to the top of the atmosphere range window. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/solar_azimuth: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/solar_azimuth units: degrees_east contentType: referenceInformation long_name: solar azimuth description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/longitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/longitude units: degrees_east contentType: referenceInformation long_name: Longitude of the ATM histogram standard_name: longitude description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_2/backg_max_bin2: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_max_bin2 units: counts contentType: modelResult long_name: Background max bin 2 description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/latitude: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/latitude units: degrees_north contentType: referenceInformation long_name: Latitude of the ATM histogram standard_name: latitude description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. source: ATL03g ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. |
| /profile_2/surf_type: | Array of 16 bit Integers [ = 0..20026][ = 0..4] HDF5_OBJ_FULLPATH: /profile_2/surf_type units: 1 contentType: referenceInformation long_name: Surface Type description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. source: ATL03 ATBD, Section 4 coordinates: delta_time, latitude, longitude flag_meanings: not_type is_type flag_values: 0, 1 valid_min: 0 valid_max: 1 |
| /profile_2/atm_rw_width_m: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/atm_rw_width_m units: seconds contentType: referenceInformation long_name: Atmospheric Range Window Width description: The range, in meters, from the Atmospheric range window start to the range window stop. source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_method3: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_method3 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Background method 3 description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/surf_type_igbp: | Array of 16 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/surf_type_igbp units: 1 long_name: IGBP Surface Type description: IGBP Surface Type source: Atmosphere ATBD, IGBP Surface Type coordinates: delta_time, latitude, longitude contentType: referenceInformation |
| /profile_2/sig_h_mean_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_mean_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signa Heightsl - Med description: Mean height of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_signal_max1: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_signal_max1 units: counts long_name: Background signal max 1 description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude contentType: modelResult |
| /profile_2/dem_h: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/dem_h _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: DEM Height description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/tx_pulse_energy: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/tx_pulse_energy units: Joules contentType: referenceInformation long_name: Transmit Pulse Energy description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. source: ATL02 ATBD, Section 7.2 coordinates: delta_time, latitude, longitude |
| /profile_2/surface_height: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/surface_height _FillValue: 3.402823466e+38 units: meters contentType: modelResult long_name: Surface height description: Height of the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_2/nrb_profile: | Array of 32 bit Reals [ = 0..20026][ = 0..699] HDF5_OBJ_FULLPATH: /profile_2/nrb_profile _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB Profile description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_mean2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_mean2 units: counts contentType: modelResult long_name: Signal mean description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/prof_dist_y: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/prof_dist_y units: meters contentType: referenceInformation long_name: Across Track Distance from RGT description: Across-Track distance from the reference ground track. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/beam_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/beam_elevation _FillValue: 3.402823466e+38 units: degrees contentType: referenceInformation long_name: beam elevation description: Beam elevation source: ATL03 ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/delta_time_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/delta_time_end units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval end time standard_name: time description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is 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. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/cal_ozone_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_ozone_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: Ozone transmission used description: Ozone transmission term used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/cal_c_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_c_trans _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: total transmission used description: The total transmission used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/longitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/longitude units: degrees_east contentType: modelResult long_name: Calibration interval start longitude standard_name: longitude description: Start Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude valid_min: -180. valid_max: 180. |
| /profile_2/calibration/latitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/latitude_end units: degrees_north contentType: modelResult long_name: Calibration interval end latitude description: Stop Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -90. valid_max: 90. |
| /profile_2/calibration/latitude: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/latitude units: degrees_north long_name: Calibration interval start Latitude standard_name: latitude description: Start Latitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, longitude valid_min: -90. valid_max: 90. contentType: modelResult |
| /profile_2/calibration/cal_molec: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_molec _FillValue: 3.402823466e+38 units: m-1 sr-1 contentType: modelResult long_name: Molecular Backscatter used description: Molecular Backscatter value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/cal_c: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_c _FillValue: 3.402823466e+38 units: Photons*m^3 *sr / J contentType: modelResult long_name: Calculated Calibration constant description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/delta_time: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Calibration interval start time standard_name: time 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. source: Derived via Time Tagging coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_2/calibration/cal_con: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_con _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Calibration Confidence description: Calibration Confidence source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/cal_nrb: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/cal_nrb _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: NRB value used description: NRB value used to compute cal_const. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/calibration/longitude_end: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /profile_2/calibration/longitude_end units: degrees_east contentType: modelResult long_name: Calibration interval end longitude description: Stop Longitude of calibration interval. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude valid_min: -180. valid_max: 180. |
| /profile_2/segment_id: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/segment_id units: 1 contentType: referenceInformation long_name: along-track segment ID number. description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. source: ATL03 ATBD, Section 3.1 coordinates: delta_time, latitude, longitude |
| /profile_2/surface_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/surface_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: Surface bin description: Vertially aligned, NRB bin number of the detected surface return. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_2/solar_elevation: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/solar_elevation units: degrees contentType: referenceInformation long_name: solar elevation description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. source: ATL03g ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/sig_count_hi: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_count_hi units: counts contentType: referenceInformation long_name: Count of Signa Heightsl - High description: Count of high-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/dtime_fac2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/dtime_fac2 _FillValue: 3.402823466e+38 units: 1 contentType: modelResult long_name: dead_time_factor2 description: Dead time correction factor for surface signal computed from ATBD equation 2.1. source: Atmosphere ATBD coordinates: delta_time, latitude, longitude |
| /profile_2/prof_dist_x: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/prof_dist_x units: meters contentType: referenceInformation long_name: Along Track Distance description: Along-track distance from the equator crossing. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/delta_time: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/delta_time units: seconds since 2018-01-01 contentType: modelResult long_name: Elapsed GPS seconds standard_name: time 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. source: Atmosphere ATBD coordinates: latitude, longitude CLASS: DIMENSION_SCALE |
| /profile_2/backg_std_dev2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_std_dev2 units: counts contentType: modelResult long_name: Background standard deviation 2 description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/backg_method2: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/backg_method2 units: counts contentType: modelResult long_name: Background method 2 description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) source: Atmosphere ATBD section 3.3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/pce_mframe_cnt: | Array of 32 bit Unsigned integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/pce_mframe_cnt units: counts contentType: referenceInformation long_name: PCE Major frame counter description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID source: ATL02 coordinates: delta_time, latitude, longitude |
| /profile_2/sc_alt: | Array of 64 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sc_alt units: meters contentType: physicalMeasurement long_name: Altitude description: Height of the spacecraft above the WGS84 ellipsoid. source: ATL03g ATBD, Section 3.4 coordinates: delta_time, latitude, longitude |
| /profile_2/sig_h_sdev_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_sdev_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signal Heights -Low description: SDev of the heights of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/sig_h_mean_low: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_mean_low _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: Mean of Signal Heights - Low description: Mean height of low-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/sig_h_sdev_med: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/sig_h_sdev_med _FillValue: 3.402823466e+38 units: meters contentType: referenceInformation long_name: SDev of Signa Heights -Med description: SDev of the heights of medium-confidence signal photons source: ATL03 ATBD, Section 5 coordinates: delta_time, latitude, longitude |
| /profile_2/nrb_bot_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/nrb_bot_bin _FillValue: 2147483647 units: 1 contentType: modelResult long_name: NRB Profile bottom valid bin description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /profile_2/surface_sig: | Array of 32 bit Reals [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/surface_sig units: counts contentType: modelResult long_name: Surface signal count description: Number of photons in the detected surface bin. source: Atmosphere ATBD section 3.3.5 coordinates: delta_time, latitude, longitude |
| /profile_2/nrb_top_bin: | Array of 32 bit Integers [ = 0..20026] HDF5_OBJ_FULLPATH: /profile_2/nrb_top_bin _FillValue: 2147483647 units: counts contentType: modelResult long_name: NRB Profile top valid bin description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. source: Atmosphere ATBD section 2.3 coordinates: delta_time, latitude, longitude |
| /ancillary_data/release: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/release units: 1 contentType: auxiliaryInformation long_name: Release Number 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. source: Operations |
| /ancillary_data/end_geoseg: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_geoseg units: 1 contentType: auxiliaryInformation long_name: Ending Geolocation Segment 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. source: Derived |
| /ancillary_data/version: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/version units: 1 contentType: auxiliaryInformation long_name: Version 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. source: Operations |
| /ancillary_data/end_region: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_region units: 1 contentType: auxiliaryInformation long_name: Ending Region 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. source: Derived |
| /ancillary_data/atmosphere/cal_atm_trans: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_atm_trans units: 1 contentType: auxiliaryInformation long_name: Cal Atm Trans description: Particulate transmission from top of atmosphere to the calibration height (13 km) source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/back_f2: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/back_f2 units: 1 contentType: auxiliaryInformation long_name: Background Fact method2 description: Scaling factor in Method 2 background computation source: Atmosphere ATBD section 3.3.4 |
| /ancillary_data/atmosphere/cal_cloud_thres: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_cloud_thres units: counts contentType: auxiliaryInformation long_name: Cal Cloud Threshold description: Threshold for excluding NRB data in calibration zone. source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/va_top_ht: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/va_top_ht units: meters contentType: auxiliaryInformation long_name: Top height of vertically aligned profile description: Top height of vertically aligned profile source: Atmosphere ATBD |
| /ancillary_data/atmosphere/alpha: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/alpha units: 1 contentType: auxiliaryInformation long_name: Scaling factor (a) description: Scaling factor (a) for computation of the magnitude of molecular folding. source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/cal_integ_time: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_integ_time units: seconds contentType: auxiliaryInformation long_name: Cal Integ Time description: Calibration integration time source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/ozone_const: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/ozone_const units: 1 contentType: auxiliaryInformation long_name: Ozone column density constant description: Ozone column density constant source: Atmosphere ATBD |
| /ancillary_data/atmosphere/bin_span: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/bin_span units: counts contentType: auxiliaryInformation long_name: Number of bins to search for max description: Number of bins to search for max source: Atmosphere ATBD |
| /ancillary_data/atmosphere/num_va_bins: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/num_va_bins units: counts contentType: auxiliaryInformation long_name: Number of vertically aligned bins description: Number of vertically aligned bins source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atlas_atm_shot_sum_50hz: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_atm_shot_sum_50hz units: counts contentType: auxiliaryInformation long_name: Number of shots at 50hz description: Number of shots summed to compute an ATM histogram at 50 hz (diagnostic) source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atlas_n_atm_hist_bins: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_n_atm_hist_bins units: counts contentType: auxiliaryInformation long_name: Number of histogram bins description: Number of ATM histogram bins source: Atmosphere ATBD |
| /ancillary_data/atmosphere/gas_const_r: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/gas_const_r units: 1 contentType: auxiliaryInformation long_name: Ideal gas constant R description: Ideal gas constant (R) source: Globals |
| /ancillary_data/atmosphere/deg2rad: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/deg2rad units: 1 contentType: auxiliaryInformation long_name: Degree to radians conversion description: Degrees to radians conversion factor source: Globals |
| /ancillary_data/atmosphere/atlas_atm_hist_binsize: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_atm_hist_binsize units: meters contentType: auxiliaryInformation description: Nominal size of each ATM histogram bin, in meters source: Atmosphere ATBD long_name: Histogram bin size (m) |
| /ancillary_data/atmosphere/backg_n_seg: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/backg_n_seg units: counts contentType: auxiliaryInformation long_name: Number of background segments in method 1 description: Number of background segments in method 1 source: Atmosphere ATBD section 3.3.4 |
| /ancillary_data/atmosphere/king_fact: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/king_fact units: 1 contentType: auxiliaryInformation long_name: KING factor description: King factor for molecular transmission. source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atlas_atm_hist_binsize_s: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_atm_hist_binsize_s units: meters contentType: auxiliaryInformation description: Nominal size of each ATM histogram bin, in seconds source: Atmosphere ATBD long_name: Histogram bin size (s) |
| /ancillary_data/atmosphere/cal_top_h: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_top_h units: meters contentType: auxiliaryInformation long_name: Top height of Cal zone description: Top height of the calibration zone source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/cal_default: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_default units: Photons*m^3 *sr / J contentType: auxiliaryInformation long_name: Default CAL Constant description: Default atmosphere calibration constant. Used by default when no calibration data have been computed for an ATL04 granule. source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/back_f1: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/back_f1 units: 1 contentType: auxiliaryInformation long_name: Background Fact method1 description: Scaling factor in Method 1 background computation source: Atmosphere ATBD section 3.3.4 |
| /ancillary_data/atmosphere/grd_thres: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/grd_thres units: counts contentType: auxiliaryInformation long_name: Ground Threshold description: Threshold for Ground detection (photons/bin) source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/atm_tep_width: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_tep_width units: sq meters contentType: auxiliaryInformation long_name: TEP Window Width description: The width of the TEP removal window. source: Atmosphere ATBD |
| /ancillary_data/atmosphere/dtime_select: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/dtime_select units: 1 contentType: auxiliaryInformation description: Deadtime factor used. source: Control flag_meanings: dtime_fact1 dtime_fact2 flag_values: 1, 2 valid_min: 1 valid_max: 2 long_name: dead time factor used |
| /ancillary_data/atmosphere/boltzmann_const: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/boltzmann_const units: erg/K contentType: auxiliaryInformation long_name: Boltzmann Constant description: Boltzmann constant source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/atm_laser_wavelength_nm: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_laser_wavelength_nm units: nm contentType: auxiliaryInformation long_name: Laser Wavelength (nm) description: ATLAS Laser wavelength, in nanometers source: Atmosphere ATBD |
| /ancillary_data/atmosphere/ht_min: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/ht_min units: meters contentType: auxiliaryInformation long_name: Minimum height to use in ATM profile description: Minimum height to use in ATM profile source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atlas_n_pce: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_n_pce units: 1 contentType: auxiliaryInformation long_name: Number of ATLAS PCEs description: Number of ATLAS PCE boards source: Atmosphere ATBD |
| /ancillary_data/atmosphere/num_molec_bins: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/num_molec_bins units: counts contentType: auxiliaryInformation long_name: Number of bins in molecular profile description: Number of bins in molecular profile source: Atmosphere ATBD |
| /ancillary_data/atmosphere/molec_top_ht: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/molec_top_ht units: meters contentType: auxiliaryInformation long_name: Top height of molecular profile description: Top height of molecular profile. source: Atmosphere ATBD |
| /ancillary_data/atmosphere/aer_scat_rat: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/aer_scat_rat units: 1 contentType: auxiliaryInformation long_name: Aerosol Scattering Ratio description: Aerosol Scattering Ratio in the calibration zone (11 source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atm_processing_interval: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_processing_interval units: seconds contentType: auxiliaryInformation long_name: Seconds of ATM data processed in one chunk. description: The number of seconds of ATM data processed in one chunk. source: Control |
| /ancillary_data/atmosphere/atm_tep_start: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_tep_start units: ns contentType: auxiliaryInformation long_name: TEP Window Start description: The start time of the TEP removal window. source: Atmosphere ATBD |
| /ancillary_data/atmosphere/receiver_optical_throughput: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/receiver_optical_throughput units: 1 contentType: auxiliaryInformation description: Nominal Receiver Optics Throughput source: Atmosphere ATBD long_name: Receiver Optics Throughput |
| /ancillary_data/atmosphere/atlas_atm_shot_sum_25hz: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atlas_atm_shot_sum_25hz units: counts contentType: auxiliaryInformation description: Number of shots summed to compute an ATM histogram at 25 hz (nominal) source: Atmosphere ATBD long_name: Number of shots at 25hz |
| /ancillary_data/atmosphere/telescope_area: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/telescope_area units: sq meters contentType: auxiliaryInformation long_name: Telescope Effective Area description: Effective collection area of telescope (At) source: Atmosphere ATBD |
| /ancillary_data/atmosphere/chappius_coef: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/chappius_coef units: 1 contentType: auxiliaryInformation long_name: Chappius Coefficient description: Chappius ozone absorption coefficient source: Atmosphere ATBD |
| /ancillary_data/atmosphere/grd_thres_atl03: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/grd_thres_atl03 units: 1 contentType: auxiliaryInformation long_name: Ground Threshold using ATL03 signal description: Threshold for Ground detection (photons/bin) when using ATL03-classified signal source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/cal_scat_ratio: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_scat_ratio units: 1 contentType: auxiliaryInformation long_name: Cal Scat Ratio description: Calibration Zone (13 to 11 km) aerosol scattering ratio source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/planck_const: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/planck_const units: Js contentType: auxiliaryInformation long_name: Planck constant (h) description: Planck constant (h) source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/detector_efficiency: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/detector_efficiency units: 1 contentType: auxiliaryInformation long_name: Detector Quantum Efficiency description: Detector quantum efficiency (Qe) source: Atmosphere ATBD |
| /ancillary_data/atmosphere/atm_pulse_ns: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_pulse_ns units: sq meters contentType: auxiliaryInformation long_name: Pulse Time description: The time between ATLAS pulses. source: Atmosphere ATBD |
| /ancillary_data/atmosphere/speed_of_light: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/speed_of_light units: meters/second contentType: auxiliaryInformation long_name: Speed of light (c) description: Speed of light (c) source: Globals |
| /ancillary_data/atmosphere/backg_select: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/backg_select units: 1 contentType: auxiliaryInformation long_name: background method used description: The background method used in calculation of NRB source: Atmosphere ATBD section 3.3.4 |
| /ancillary_data/atmosphere/dead_time_sfac: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/dead_time_sfac units: 1 contentType: auxiliaryInformation long_name: Dead Time Signal Factor description: Dead time signal factor source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/seg_pct_thres: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/seg_pct_thres units: 1 contentType: auxiliaryInformation long_name: Segment percent threshold description: Segment percent threshold source: Atmosphere ATBD |
| /ancillary_data/atmosphere/cal_lat_bound: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_lat_bound units: degrees contentType: auxiliaryInformation long_name: Cal Latitude Bound description: The latitude boundary for calibration calculation source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/cal_bot_h: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_bot_h units: meters contentType: auxiliaryInformation long_name: Bottom height of Cal zone description: Bottom height of the calibration zone source: Atmosphere ATBD section 2 |
| /ancillary_data/atmosphere/pi: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/pi units: counts contentType: auxiliaryInformation long_name: PI description: PI source: Globals |
| /ancillary_data/atmosphere/atm_laser_wavelength_m: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/atm_laser_wavelength_m units: meters contentType: auxiliaryInformation description: ATLAS Laser wavelength, in meters source: Atmosphere ATBD long_name: Laser Wavelength (m) |
| /ancillary_data/atmosphere/cal_solar_angle_limit: | Array of 32 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atmosphere/cal_solar_angle_limit units: degrees contentType: auxiliaryInformation long_name: Cal Solar Angle Limit description: Minimum solar zenith angle for calibration calculation source: Atmosphere ATBD section 2 |
| /ancillary_data/atlas_sdp_gps_epoch: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/atlas_sdp_gps_epoch units: seconds since 1980-01-06T00:00:00.000000Z contentType: auxiliaryInformation long_name: ATLAS Epoch Offset 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. source: Operations |
| /ancillary_data/end_rgt: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_rgt units: 1 contentType: auxiliaryInformation long_name: Ending Reference Groundtrack 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. source: Derived valid_min: 1 valid_max: 1387 |
| /ancillary_data/end_orbit: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_orbit units: 1 contentType: auxiliaryInformation 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. source: Derived long_name: Ending Orbit Number |
| /ancillary_data/start_cycle: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_cycle units: 1 contentType: auxiliaryInformation long_name: Starting Cycle 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. source: Derived valid_min: 0 valid_max: 99 |
| /ancillary_data/data_end_utc: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/data_end_utc units: 1 contentType: auxiliaryInformation long_name: End UTC Time of Granule (CCSDS-A, Actual) description: UTC (in CCSDS-A format) of the last data point within the granule. source: Derived |
| /ancillary_data/control: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/control units: 1 contentType: auxiliaryInformation long_name: Control File description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. source: Operations |
| /ancillary_data/start_gpssow: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_gpssow units: seconds contentType: auxiliaryInformation long_name: Start GPS SOW of Granule (Actual) description: GPS seconds-of-week of the first data point in the granule. source: Derived |
| /ancillary_data/granule_end_utc: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/granule_end_utc units: 1 contentType: auxiliaryInformation long_name: End UTC Time of Granule (CCSDS-A, Requested) description: Requested end time (in UTC CCSDS-A) of this granule. source: Derived |
| /ancillary_data/end_cycle: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_cycle units: 1 contentType: auxiliaryInformation long_name: Ending Cycle 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. source: Derived valid_min: 0 valid_max: 99 |
| /ancillary_data/granule_start_utc: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/granule_start_utc units: 1 contentType: auxiliaryInformation long_name: Start UTC Time of Granule (CCSDS-A, Requested) description: Requested start time (in UTC CCSDS-A) of this granule. source: Derived |
| /ancillary_data/start_geoseg: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_geoseg units: 1 contentType: auxiliaryInformation long_name: Starting Geolocation Segment 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. source: Derived |
| /ancillary_data/start_orbit: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_orbit units: 1 contentType: auxiliaryInformation long_name: Starting Orbit Number 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. source: Derived |
| /ancillary_data/data_start_utc: | Array of Strings [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/data_start_utc units: 1 contentType: auxiliaryInformation long_name: Start UTC Time of Granule (CCSDS-A, Actual) description: UTC (in CCSDS-A format) of the first data point within the granule. source: Derived |
| /ancillary_data/end_gpsweek: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_gpsweek units: weeks from 1980-01-06 contentType: auxiliaryInformation long_name: Ending GPSWeek of Granule (Actual) description: GPS week number of the last data point in the granule. source: Derived |
| /ancillary_data/start_rgt: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_rgt units: 1 contentType: auxiliaryInformation long_name: Starting Reference Groundtrack 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. source: Derived valid_min: 1 valid_max: 1387 |
| /ancillary_data/end_gpssow: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/end_gpssow units: seconds contentType: auxiliaryInformation long_name: Ending GPS SOW of Granule (Actual) description: GPS seconds-of-week of the last data point in the granule. source: Derived |
| /ancillary_data/qa_at_interval: | Array of 64 bit Reals [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/qa_at_interval units: 1 contentType: auxiliaryInformation long_name: QA Along-Track Interval description: Statistics time interval for along-track QA data. source: control |
| /ancillary_data/start_region: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_region units: 1 contentType: auxiliaryInformation long_name: Starting Region 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. source: Derived |
| /ancillary_data/start_gpsweek: | Array of 32 bit Integers [ = 0..0] HDF5_OBJ_FULLPATH: /ancillary_data/start_gpsweek units: weeks from 1980-01-06 contentType: auxiliaryInformation long_name: Start GPSWeek of Granule (Actual) description: GPS week number of the first data point in the granule. source: Derived |
| /ds_va_bin_h: | Array of 32 bit Reals [ = 0..699] HDF5_OBJ_FULLPATH: /ds_va_bin_h units: meters contentType: auxiliaryInformation long_name: VA Bin Height Dimension Scale description: Dimension scale containing the heights of the vertically-aligned bins. source: Atmosphere ATBD valid_min: 1. valid_max: 700. CLASS: DIMENSION_SCALE NAME: /ds_va_bin_h |