DAP4 Data Request Form ATL24_20241107234251_08052501_006_01_002_01.h5

dataset: ATL24_20241107234251_08052501_006_01_002_01.h5
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Data URL
Global Attributes
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    • ancillary_data: (Type is Container)
    • gt1l: (Type is Container)
    • gt1r: (Type is Container)
    • gt2l: (Type is Container)
    • gt2r: (Type is Container)
    • gt3l: (Type is Container)
    • gt3r: (Type is Container)
    • metadata: (Type is Container)
      • metadata_DatasetIdentification
        • status: onGoing (Type is String)
        • spatialRepresentationType: along-track (Type is String)
        • creationDate: 2025-09-27T04:46:59.000000Z (Type is String)
        • uuid: 02edefa0-02ff-47fa-b2c5-3ad02bbfa856 (Type is String)
        • fileName: ATL24_20241107234251_08052501_006_01_002_01.h5 (Type is String)
        • VersionID: 002 (Type is String)
        • language: eng (Type is String)
        • characterSet: utf8 (Type is String)
        • shortName: ATL24 (Type is String)
        • originatorOrganizationName: SlideRule (Type is String)
        • abstract: ATL24 provides global along-track coastal and nearshore bathymetry, consisting of refraction corrected seafloor and sea surface heights (orthometric and ellipsoidal heights and instantaneous depths), as well as associated uncertainties. (Type is String)
        • purpose: The purpose of ATL24 is to provide photon level classification of sea surface and seafloor for ATL03 data in coastal and nearshore regions. (Type is String)
        • credit: The ATL24 product was designed and implemented by a team led by Lori Magruder at the University of Texas at Austin, and Christopher Parrish at Oregon State University. (Type is String)
        • topicCategory: geoscientificInformation (Type is String)
        • fullnamepath: /metadata/DatasetIdentification (Type is String)
    • orbit_info: (Type is Container)
Global Dimensions
None
Variables
ancillary_data_atlas_sdp_gps_epoch(Type is Float64)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. (Type is String)
    • long_name: ATLAS Epoch Offset (Type is String)
    • source: Operations (Type is String)
    • units: seconds since 1980-01-06T00:00:00.000000Z (Type is String)
    • origname: atlas_sdp_gps_epoch (Type is String)
    • fullnamepath: /ancillary_data/atlas_sdp_gps_epoch (Type is String)
ancillary_data_data_end_utc(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: UTC (in CCSDS-A format) of the last data point within the granule. (Type is String)
    • long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: data_end_utc (Type is String)
    • fullnamepath: /ancillary_data/data_end_utc (Type is String)
ancillary_data_data_start_utc(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: UTC (in CCSDS-A format) of the first data point within the granule. (Type is String)
    • long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: data_start_utc (Type is String)
    • fullnamepath: /ancillary_data/data_start_utc (Type is String)
ancillary_data_end_cycle(Type is Byte)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. (Type is String)
    • long_name: Ending Cycle (Type is String)
    • units: 1 (Type is String)
    • origname: end_cycle (Type is String)
    • fullnamepath: /ancillary_data/end_cycle (Type is String)
ancillary_data_end_delta_time(Type is Float64)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: ATLAS End Time (Actual) (Type is String)
    • source: Derived (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • standard_name: time (Type is String)
    • origname: end_delta_time (Type is String)
    • fullnamepath: /ancillary_data/end_delta_time (Type is String)
ancillary_data_end_geoseg(Type is Int32)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. (Type is String)
    • long_name: Ending Geolocation Segment (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: end_geoseg (Type is String)
    • fullnamepath: /ancillary_data/end_geoseg (Type is String)
ancillary_data_end_gpssow(Type is Float64)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS seconds-of-week of the last data point in the granule. (Type is String)
    • long_name: Ending GPS SOW of Granule (Actual) (Type is String)
    • source: Derived (Type is String)
    • units: seconds (Type is String)
    • origname: end_gpssow (Type is String)
    • fullnamepath: /ancillary_data/end_gpssow (Type is String)
ancillary_data_end_gpsweek(Type is Int32)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS week number of the last data point in the granule. (Type is String)
    • long_name: Ending GPSWeek of Granule (Actual) (Type is String)
    • source: Derived (Type is String)
    • units: weeks from 1980-01-06 (Type is String)
    • origname: end_gpsweek (Type is String)
    • fullnamepath: /ancillary_data/end_gpsweek (Type is String)
ancillary_data_end_orbit(Type is Int16)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. (Type is String)
    • long_name: Ending Orbit Number (Type is String)
    • units: 1 (Type is String)
    • origname: end_orbit (Type is String)
    • fullnamepath: /ancillary_data/end_orbit (Type is String)
ancillary_data_end_region(Type is Byte)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. (Type is String)
    • long_name: Ending Region (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: end_region (Type is String)
    • fullnamepath: /ancillary_data/end_region (Type is String)
ancillary_data_end_rgt(Type is UInt16)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. (Type is String)
    • long_name: Ending Reference Groundtrack (Type is String)
    • units: 1 (Type is String)
    • origname: end_rgt (Type is String)
    • fullnamepath: /ancillary_data/end_rgt (Type is String)
ancillary_data_granule_end_utc(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Requested end time (in UTC CCSDS-A) of this granule. (Type is String)
    • long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: granule_end_utc (Type is String)
    • fullnamepath: /ancillary_data/granule_end_utc (Type is String)
ancillary_data_granule_start_utc(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Requested start time (in UTC CCSDS-A) of this granule. (Type is String)
    • source: Derived (Type is String)
    • long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String)
    • units: 1 (Type is String)
    • origname: granule_start_utc (Type is String)
    • fullnamepath: /ancillary_data/granule_start_utc (Type is String)
ancillary_data_release(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. (Type is String)
    • long_name: Release Number (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: release (Type is String)
    • fullnamepath: /ancillary_data/release (Type is String)
ancillary_data_resource(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: ATL03 granule used to produce this granule (Type is String)
    • long_name: ATL03 Resource (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: resource (Type is String)
    • fullnamepath: /ancillary_data/resource (Type is String)
ancillary_data_sliderule_commit(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Operations (Type is String)
    • description: Git commit ID (https://github.com/SlideRuleEarth/sliderule.git) of SlideRule software used to generate this granule (Type is String)
    • long_name: SlideRule Commit (Type is String)
    • units: 1 (Type is String)
    • origname: sliderule_commit (Type is String)
    • fullnamepath: /ancillary_data/sliderule_commit (Type is String)
ancillary_data_sliderule_environment(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Git commit ID (https://github.com/SlideRuleEarth/sliderule.git) of SlideRule environment used to generate this granule (Type is String)
    • long_name: SlideRule Environment (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: sliderule_environment (Type is String)
    • fullnamepath: /ancillary_data/sliderule_environment (Type is String)
ancillary_data_sliderule_version(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Version of SlideRule software used to generate this granule (Type is String)
    • long_name: SlideRule Version (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: sliderule_version (Type is String)
    • fullnamepath: /ancillary_data/sliderule_version (Type is String)
ancillary_data_start_cycle(Type is Byte)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. (Type is String)
    • long_name: Starting Cycle (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: start_cycle (Type is String)
    • fullnamepath: /ancillary_data/start_cycle (Type is String)
ancillary_data_start_delta_time(Type is Float64)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: ATLAS Start Time (Actual) (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: start_delta_time (Type is String)
    • fullnamepath: /ancillary_data/start_delta_time (Type is String)
ancillary_data_start_geoseg(Type is Int32)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • long_name: Starting Geolocation Segment (Type is String)
    • source: Derived (Type is String)
    • description: The starting geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. (Type is String)
    • units: 1 (Type is String)
    • origname: start_geoseg (Type is String)
    • fullnamepath: /ancillary_data/start_geoseg (Type is String)
ancillary_data_start_gpssow(Type is Float64)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS seconds-of-week of the first data point in the granule. (Type is String)
    • long_name: Start GPS SOW of Granule (Actual) (Type is String)
    • source: Derived (Type is String)
    • units: seconds (Type is String)
    • origname: start_gpssow (Type is String)
    • fullnamepath: /ancillary_data/start_gpssow (Type is String)
ancillary_data_start_gpsweek(Type is Int32)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS week number of the first data point in the granule. (Type is String)
    • long_name: Start GPSWeek of Granule (Actual) (Type is String)
    • source: Derived (Type is String)
    • units: weeks from 1980-01-06 (Type is String)
    • origname: start_gpsweek (Type is String)
    • fullnamepath: /ancillary_data/start_gpsweek (Type is String)
ancillary_data_start_orbit(Type is Int16)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. (Type is String)
    • long_name: Starting Orbit Number (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: start_orbit (Type is String)
    • fullnamepath: /ancillary_data/start_orbit (Type is String)
ancillary_data_start_region(Type is Byte)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. (Type is String)
    • long_name: Starting Region (Type is String)
    • units: 1 (Type is String)
    • origname: start_region (Type is String)
    • fullnamepath: /ancillary_data/start_region (Type is String)
ancillary_data_start_rgt(Type is UInt16)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. (Type is String)
    • long_name: Starting Reference Groundtrack (Type is String)
    • source: Derived (Type is String)
    • units: 1 (Type is String)
    • origname: start_rgt (Type is String)
    • fullnamepath: /ancillary_data/start_rgt (Type is String)
ancillary_data_version(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. (Type is String)
    • long_name: Version (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: version (Type is String)
    • fullnamepath: /ancillary_data/version (Type is String)
gt1l_class_ph[ 0..188587] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt1l/class_ph (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_confidence[ 0..188587] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt1l/confidence (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_delta_time[ 0..188587] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt1l/delta_time (Type is String)
    • coordinates: gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_ellipse_h[ 0..188587] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt1l/ellipse_h (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_index_ph[ 0..188587] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt1l/index_ph (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_index_seg[ 0..188587] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt1l/index_seg (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_invalid_kd[ 0..188587] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • long_name: Invalid Kd (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt1l/invalid_kd (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_invalid_wind_speed[ 0..188587] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt1l/invalid_wind_speed (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_lat_ph[ 0..188587] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • long_name: Latitude (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • source: ATL03 (Type is String)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt1l/lat_ph (Type is String)
    • coordinates: gt1l_delta_time gt1l_lon_ph (Type is String)
gt1l_lon_ph[ 0..188587] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt1l/lon_ph (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph (Type is String)
gt1l_low_confidence_flag[ 0..188587] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • units: boolean (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt1l/low_confidence_flag (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_night_flag[ 0..188587] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt1l/night_flag (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_ortho_h[ 0..188587] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt1l/ortho_h (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_sensor_depth_exceeded[ 0..188587] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt1l/sensor_depth_exceeded (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_sigma_thu[ 0..188587] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt1l/sigma_thu (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_sigma_tvu[ 0..188587] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt1l/sigma_tvu (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_surface_h[ 0..188587] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt1l/surface_h (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_x_atc[ 0..188587] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt1l/x_atc (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1l_y_atc[ 0..188587] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt1l/y_atc (Type is String)
    • coordinates: gt1l_delta_time gt1l_lat_ph gt1l_lon_ph (Type is String)
gt1r_class_ph[ 0..36267] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt1r/class_ph (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_confidence[ 0..36267] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt1r/confidence (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_delta_time[ 0..36267] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt1r/delta_time (Type is String)
    • coordinates: gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_ellipse_h[ 0..36267] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt1r/ellipse_h (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_index_ph[ 0..36267] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt1r/index_ph (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_index_seg[ 0..36267] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt1r/index_seg (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_invalid_kd[ 0..36267] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • long_name: Invalid Kd (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt1r/invalid_kd (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_invalid_wind_speed[ 0..36267] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt1r/invalid_wind_speed (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_lat_ph[ 0..36267] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Latitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt1r/lat_ph (Type is String)
    • coordinates: gt1r_delta_time gt1r_lon_ph (Type is String)
gt1r_lon_ph[ 0..36267] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt1r/lon_ph (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph (Type is String)
gt1r_low_confidence_flag[ 0..36267] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt1r/low_confidence_flag (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_night_flag[ 0..36267] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt1r/night_flag (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_ortho_h[ 0..36267] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt1r/ortho_h (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_sensor_depth_exceeded[ 0..36267] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt1r/sensor_depth_exceeded (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_sigma_thu[ 0..36267] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt1r/sigma_thu (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_sigma_tvu[ 0..36267] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt1r/sigma_tvu (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_surface_h[ 0..36267] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt1r/surface_h (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_x_atc[ 0..36267] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt1r/x_atc (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt1r_y_atc[ 0..36267] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt1r/y_atc (Type is String)
    • coordinates: gt1r_delta_time gt1r_lat_ph gt1r_lon_ph (Type is String)
gt2l_class_ph[ 0..106046] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt2l/class_ph (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_confidence[ 0..106046] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt2l/confidence (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_delta_time[ 0..106046] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt2l/delta_time (Type is String)
    • coordinates: gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_ellipse_h[ 0..106046] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt2l/ellipse_h (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_index_ph[ 0..106046] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt2l/index_ph (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_index_seg[ 0..106046] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt2l/index_seg (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_invalid_kd[ 0..106046] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • long_name: Invalid Kd (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt2l/invalid_kd (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_invalid_wind_speed[ 0..106046] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt2l/invalid_wind_speed (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_lat_ph[ 0..106046] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Latitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt2l/lat_ph (Type is String)
    • coordinates: gt2l_delta_time gt2l_lon_ph (Type is String)
gt2l_lon_ph[ 0..106046] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt2l/lon_ph (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph (Type is String)
gt2l_low_confidence_flag[ 0..106046] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt2l/low_confidence_flag (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_night_flag[ 0..106046] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt2l/night_flag (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_ortho_h[ 0..106046] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt2l/ortho_h (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_sensor_depth_exceeded[ 0..106046] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt2l/sensor_depth_exceeded (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_sigma_thu[ 0..106046] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt2l/sigma_thu (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_sigma_tvu[ 0..106046] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt2l/sigma_tvu (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_surface_h[ 0..106046] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt2l/surface_h (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_x_atc[ 0..106046] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt2l/x_atc (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2l_y_atc[ 0..106046] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt2l/y_atc (Type is String)
    • coordinates: gt2l_delta_time gt2l_lat_ph gt2l_lon_ph (Type is String)
gt2r_class_ph[ 0..29728] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt2r/class_ph (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_confidence[ 0..29728] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt2r/confidence (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_delta_time[ 0..29728] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt2r/delta_time (Type is String)
    • coordinates: gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_ellipse_h[ 0..29728] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt2r/ellipse_h (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_index_ph[ 0..29728] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt2r/index_ph (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_index_seg[ 0..29728] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt2r/index_seg (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_invalid_kd[ 0..29728] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • long_name: Invalid Kd (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt2r/invalid_kd (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_invalid_wind_speed[ 0..29728] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt2r/invalid_wind_speed (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_lat_ph[ 0..29728] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Latitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt2r/lat_ph (Type is String)
    • coordinates: gt2r_delta_time gt2r_lon_ph (Type is String)
gt2r_lon_ph[ 0..29728] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt2r/lon_ph (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph (Type is String)
gt2r_low_confidence_flag[ 0..29728] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt2r/low_confidence_flag (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_night_flag[ 0..29728] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt2r/night_flag (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_ortho_h[ 0..29728] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt2r/ortho_h (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_sensor_depth_exceeded[ 0..29728] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt2r/sensor_depth_exceeded (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_sigma_thu[ 0..29728] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt2r/sigma_thu (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_sigma_tvu[ 0..29728] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt2r/sigma_tvu (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_surface_h[ 0..29728] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt2r/surface_h (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_x_atc[ 0..29728] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt2r/x_atc (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt2r_y_atc[ 0..29728] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt2r/y_atc (Type is String)
    • coordinates: gt2r_delta_time gt2r_lat_ph gt2r_lon_ph (Type is String)
gt3l_class_ph[ 0..122727] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt3l/class_ph (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_confidence[ 0..122727] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt3l/confidence (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_delta_time[ 0..122727] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt3l/delta_time (Type is String)
    • coordinates: gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_ellipse_h[ 0..122727] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt3l/ellipse_h (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_index_ph[ 0..122727] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt3l/index_ph (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_index_seg[ 0..122727] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt3l/index_seg (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_invalid_kd[ 0..122727] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • long_name: Invalid Kd (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt3l/invalid_kd (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_invalid_wind_speed[ 0..122727] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt3l/invalid_wind_speed (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_lat_ph[ 0..122727] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Latitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt3l/lat_ph (Type is String)
    • coordinates: gt3l_delta_time gt3l_lon_ph (Type is String)
gt3l_lon_ph[ 0..122727] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt3l/lon_ph (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph (Type is String)
gt3l_low_confidence_flag[ 0..122727] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt3l/low_confidence_flag (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_night_flag[ 0..122727] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt3l/night_flag (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_ortho_h[ 0..122727] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt3l/ortho_h (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_sensor_depth_exceeded[ 0..122727] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt3l/sensor_depth_exceeded (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_sigma_thu[ 0..122727] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt3l/sigma_thu (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_sigma_tvu[ 0..122727] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt3l/sigma_tvu (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_surface_h[ 0..122727] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt3l/surface_h (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_x_atc[ 0..122727] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt3l/x_atc (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3l_y_atc[ 0..122727] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt3l/y_atc (Type is String)
    • coordinates: gt3l_delta_time gt3l_lat_ph gt3l_lon_ph (Type is String)
gt3r_class_ph[ 0..29322] (Type is Int8)
  • attributes
    • contentType: modelResults (Type is String)
    • description: 0 - unclassified, 1 - other, 40 - bathymetry, 41 - sea surface (Type is String)
    • long_name: Photon classification (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: class_ph (Type is String)
    • fullnamepath: /gt3r/class_ph (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_confidence[ 0..29322] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: ensemble confidence score from 0.0 to 1.0 where larger numbers represent higher confidence in classification (Type is String)
    • long_name: Ensemble confidence (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: confidence (Type is String)
    • fullnamepath: /gt3r/confidence (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_delta_time[ 0..29322] (Type is Float64)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The transmit time of a given photon, measured in seconds from the ATLAS Standard Data Product Epoch. Note that multiple received photons associated with a single transmit pulse will have the same delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL03 (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /gt3r/delta_time (Type is String)
    • coordinates: gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_ellipse_h[ 0..29322] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the WGS-84 ellipsoid including refraction correction. Note neither the geoid, ocean tide nor the dynamic atmosphere (DAC) corrections are applied to the ellipsoidal heights. (Type is String)
    • long_name: Photon WGS84 height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ellipse_h (Type is String)
    • fullnamepath: /gt3r/ellipse_h (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_index_ph[ 0..29322] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 heights group (Type is String)
    • long_name: Photon index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_ph (Type is String)
    • fullnamepath: /gt3r/index_ph (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_index_seg[ 0..29322] (Type is Int32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: 0-based index of the photon in the ATL03 geolocation group (Type is String)
    • long_name: Segment index (Type is String)
    • source: ATL03 (Type is String)
    • units: scalar (Type is String)
    • origname: index_seg (Type is String)
    • fullnamepath: /gt3r/index_seg (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_invalid_kd[ 0..29322] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that no data was available in the VIIRS Kd490 8-day cycle dataset at the time and location of the photon (Type is String)
    • long_name: Invalid Kd (Type is String)
    • source: VIIRS Kd490 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_kd (Type is String)
    • fullnamepath: /gt3r/invalid_kd (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_invalid_wind_speed[ 0..29322] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Indicates that ATL09 data was not able to be read to determine wind speed (Type is String)
    • long_name: Invalid wind speed (Type is String)
    • source: ATL09 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: invalid_wind_speed (Type is String)
    • fullnamepath: /gt3r/invalid_wind_speed (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_lat_ph[ 0..29322] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Latitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Latitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_north (Type is String)
    • standard_name: latitude (Type is String)
    • valid_max: 90.000000000000000 (Type is Float64)
    • valid_min: -90.000000000000000 (Type is Float64)
    • origname: lat_ph (Type is String)
    • fullnamepath: /gt3r/lat_ph (Type is String)
    • coordinates: gt3r_delta_time gt3r_lon_ph (Type is String)
gt3r_lon_ph[ 0..29322] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Longitude of each received photon. Computed from the ECF Cartesian coordinates of the bounce point. (Type is String)
    • long_name: Longitude (Type is String)
    • source: ATL03 (Type is String)
    • units: degrees_east (Type is String)
    • standard_name: longitude (Type is String)
    • valid_max: 180.00000000000000 (Type is Float64)
    • valid_min: -180.00000000000000 (Type is Float64)
    • origname: lon_ph (Type is String)
    • fullnamepath: /gt3r/lon_ph (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph (Type is String)
gt3r_low_confidence_flag[ 0..29322] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • source: ATL03 (Type is String)
    • description: There is low confidence that the photon classified as bathymetry is actually bathymetry (Type is String)
    • long_name: Low confidence bathymetry flag (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: low_confidence_flag (Type is String)
    • fullnamepath: /gt3r/low_confidence_flag (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_night_flag[ 0..29322] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The solar elevation was less than 5 degrees at the time and location of the photon (Type is String)
    • long_name: Night flag (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: night_flag (Type is String)
    • fullnamepath: /gt3r/night_flag (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_ortho_h[ 0..29322] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: Height of each received photon, relative to the geoid. (Type is String)
    • long_name: Orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: ortho_h (Type is String)
    • fullnamepath: /gt3r/ortho_h (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_sensor_depth_exceeded[ 0..29322] (Type is Byte)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The subaqueous photon is below the maximum depth detectable by the ATLAS sensor given the Kd of the water column (Type is String)
    • long_name: Sensor depth exceeded (Type is String)
    • source: ATL03 (Type is String)
    • units: boolean (Type is String)
    • flag_meanings: false, true (Type is String)
    • flag_values: 0, 1 (Type is String)
    • origname: sensor_depth_exceeded (Type is String)
    • fullnamepath: /gt3r/sensor_depth_exceeded (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_sigma_thu[ 0..29322] (Type is Float32)
  • attributes
    • contentType: physicalMeasurement (Type is String)
    • description: The combination of the aerial and subaqueous horizontal uncertainty for each received photon (Type is String)
    • long_name: Total horizontal uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_thu (Type is String)
    • fullnamepath: /gt3r/sigma_thu (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_sigma_tvu[ 0..29322] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The combination of the aerial and subaqueous vertical uncertainty for each received photon (Type is String)
    • long_name: Total vertical uncertainty (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: sigma_tvu (Type is String)
    • fullnamepath: /gt3r/sigma_tvu (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_surface_h[ 0..29322] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: The geoid corrected height of the sea surface at the detected photon (Type is String)
    • long_name: Sea surface orthometric height (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: surface_h (Type is String)
    • fullnamepath: /gt3r/surface_h (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_x_atc[ 0..29322] (Type is Float64)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Along-track distance in a segment projected to the ellipsoid of the received photon, based on the Along-Track Segment algorithm. Total along track distance can be found by adding this value to the sum of segment lengths measured from the start of the most recent reference groundtrack. (Type is String)
    • long_name: Distance from equator crossing (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /gt3r/x_atc (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
gt3r_y_atc[ 0..29322] (Type is Float32)
  • attributes
    • contentType: modelResult (Type is String)
    • description: Across-track distance projected to the ellipsoid of the received photon from the reference ground track. This is based on the Along-Track Segment algorithm described in Section 3.1 of the ATBD. (Type is String)
    • long_name: Distance off RGT (Type is String)
    • source: ATL03 (Type is String)
    • units: meters (Type is String)
    • origname: y_atc (Type is String)
    • fullnamepath: /gt3r/y_atc (Type is String)
    • coordinates: gt3r_delta_time gt3r_lat_ph gt3r_lon_ph (Type is String)
metadata_atl24(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: atl24 algorithm versioning and build information (Type is String)
    • long_name: ATL24 MetaData (Type is String)
    • source: Derived (Type is String)
    • units: json (Type is String)
    • origname: atl24 (Type is String)
    • fullnamepath: /metadata/atl24 (Type is String)
metadata_extent(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • description: geospatial and temporal extents (Type is String)
    • long_name: Query MetaData (Type is String)
    • source: Derived (Type is String)
    • units: json (Type is String)
    • origname: extent (Type is String)
    • fullnamepath: /metadata/extent (Type is String)
metadata_sliderule(Type is String)
  • attributes
    • contentType: auxiliaryInformation (Type is String)
    • source: Derived (Type is String)
    • description: sliderule server and request information (Type is String)
    • long_name: SlideRule MetaData (Type is String)
    • units: json (Type is String)
    • origname: sliderule (Type is String)
    • fullnamepath: /metadata/sliderule (Type is String)
orbit_info_crossing_time(Type is Float64)
  • attributes
    • contentType: referenceInformation (Type is String)
    • source: POD/PPD (Type is String)
    • description: The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Ascending Node Crossing Time (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • standard_name: time (Type is String)
    • origname: crossing_time (Type is String)
    • fullnamepath: /orbit_info/crossing_time (Type is String)
orbit_info_cycle_number(Type is Byte)
  • attributes
    • contentType: referenceInformation (Type is String)
    • description: Tracks the number of 91-day cycles in the mission, beginning with 01. A unique orbit number can be determined by subtracting 1 from the cycle_number, multiplying by 1387 and adding the rgt value. (Type is String)
    • long_name: Cycle Number (Type is String)
    • source: POD/PPD (Type is String)
    • units: counts (Type is String)
    • origname: cycle_number (Type is String)
    • fullnamepath: /orbit_info/cycle_number (Type is String)
orbit_info_lan(Type is Float64)
  • attributes
    • contentType: referenceInformation (Type is String)
    • description: Longitude at the ascending node crossing. (Type is String)
    • long_name: Ascending Node Longitude (Type is String)
    • source: POD/PPD (Type is String)
    • units: degrees_east (Type is String)
    • origname: lan (Type is String)
    • fullnamepath: /orbit_info/lan (Type is String)
orbit_info_orbit_number(Type is Int16)
  • attributes
    • contentType: referenceInformation (Type is String)
    • description: Unique identifying number for each planned ICESat-2 orbit. (Type is String)
    • long_name: Orbit Number (Type is String)
    • source: Operations (Type is String)
    • units: 1 (Type is String)
    • origname: orbit_number (Type is String)
    • fullnamepath: /orbit_info/orbit_number (Type is String)
orbit_info_rgt(Type is UInt16)
  • attributes
    • contentType: referenceInformation (Type is String)
    • description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT2L and GT2R. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. (Type is String)
    • long_name: Reference Ground Track (Type is String)
    • source: POD/PPD (Type is String)
    • units: counts (Type is String)
    • origname: rgt (Type is String)
    • fullnamepath: /orbit_info/rgt (Type is String)
orbit_info_sc_orient(Type is Int8)
  • attributes
    • contentType: referenceInformation (Type is String)
    • description: This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. (Type is String)
    • long_name: Spacecraft Orientation (Type is String)
    • source: POD/PPD (Type is String)
    • units: 1 (Type is String)
    • flag_meanings: backward forward transition (Type is String)
    • flag_values: 0, 1, 2 (Type is String)
    • origname: sc_orient (Type is String)
    • fullnamepath: /orbit_info/sc_orient (Type is String)
orbit_info_sc_orient_time(Type is Float64)
  • attributes
    • contentType: referenceInformation (Type is String)
    • source: POD/PPD (Type is String)
    • description: The time of the last spacecraft orientation change between forward, backward and transitional flight modes, expressed in seconds since the ATLAS SDP GPS Epoch. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • long_name: Time of Last Spacecraft Orientation Change (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • standard_name: time (Type is String)
    • origname: sc_orient_time (Type is String)
    • fullnamepath: /orbit_info/sc_orient_time (Type is String)
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