DAP4 Data Request Form ATL04_20151028T061609_00970301_941_01.h5

dataset: ATL04_20151028T061609_00970301_941_01.h5
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Global Attributes
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    • granule_type: ATL04 (Type is String)
    • short_name: ATL04 (Type is String)
    • level: 2A (Type is String)
    • description: Along-track normalized relative backscatter profiles at full instrument resolution (normally 25 times per second for ~30m vertical bins). Includes calibration coefficient values calculated in the polar region. (Type is String)
    • contributor_name: Thomas E Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) (Type is String)
    • contributor_role: Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer (Type is String)
    • Conventions: CF-1.6 (Type is String)
    • date_type: UTC (Type is String)
    • featureType: trajectory (Type is String)
    • geospatial_lat_units: degrees_north (Type is String)
    • geospatial_lon_units: degrees_east (Type is String)
    • identifier_product_doi: 10.5067/ATLAS/ATL04.001 (Type is String)
    • identifier_product_doi_authority: http://dx.doi.org (Type is String)
    • identifier_product_type: ATL04 (Type is String)
    • license: Data may not be reproduced or distributed without including the citation for this product included in this metadata. Data may not be distributed in an altered form without the written permission of the ICESat-2 Science Project Office at NASA/GSFC. (Type is String)
    • naming_authority: http://dx.doi.org (Type is String)
    • spatial_coverage_type: Horizontal (Type is String)
    • standard_name_vocabulary: CF-1.6 (Type is String)
    • time_type: CCSDS UTC-A (Type is String)
    • date_created: 2018-01-17T03:29:38.000000Z (Type is String)
    • hdfversion: HDF5 1.8.18 (Type is String)
    • history: 2018-01-17T03:29:38.000000Z;A67E7ACC-34AE-406F-DFF5-1CDB5944AD88;Created by PGE atlas_l2a_atm Version 3.1 (Type is String)
    • identifier_file_uuid: A67E7ACC-34AE-406F-DFF5-1CDB5944AD88 (Type is String)
    • identifier_product_format_version: 3.1 (Type is String)
    • time_coverage_duration: 801.12002301216125 (Type is Float64)
    • time_coverage_end: 2015-10-28T06:29:30.288021Z (Type is String)
    • time_coverage_start: 2015-10-28T06:16:09.167998Z (Type is String)
    • asas_release: ASAS v4.1 (Type is String)
    • geospatial_lat_min: -0.0012902707602664538 (Type is Float64)
    • geospatial_lon_min: -170.88174733051255 (Type is Float64)
    • geospatial_lat_max: 49.78264272926922 (Type is Float64)
    • geospatial_lon_max: -162.74654264353322 (Type is Float64)
    • publisher_name: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String)
    • publisher_email: nsidc@nsidc.org (Type is String)
    • publisher_url: http://nsidc.org/daac/ (Type is String)
    • title: ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles (Type is String)
    • identifier_file_product_type: ATL04 (Type is String)
    • institution: National Aeronautics and Space Administration (NASA) (Type is String)
    • creator_name: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String)
    • summary: The purpose of ATL04 is to provide normalized relative backscatter and ancillary meteorological and atmosphere data that will be used by to create the upstream ATL09 product. (Type is String)
    • keywords: EARTH SCIENCE > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > NONE > NONE > NONE (Type is String)
    • keywords_vocabulary: NASA/GCMD Science Keywords (Type is String)
    • citation: Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center. (Type is String)
    • processing_level: 2A (Type is String)
    • references: http://nsidc.org/data/icesat2/data.html (Type is String)
    • project: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
    • instrument: ATLAS > Advanced Topographic Laser Altimeter System (Type is String)
    • platform: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
    • source: Spacecraft (Type is String)
Global Dimensions
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      [ /ds_surf_type = 0..4 ]
      [ /ds_va_bin_h = 0..699 ]
Variables
ds_surf_type[ /ds_surf_type= 0..4] (Type is Int32)
  • attributes
    • units: 1 (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • long_name: Surface Type Dimension Scale (Type is String)
    • description: Dimension scale indexing the surface type array. Index=1 corresponds to Land; index = 2 corresponds to Ocean; Index = 3 corresponds to SeaIce; Index=4 corresponds to LandIce; Index=5 corresponds to InlandWater (Type is String)
    • flag_meanings: land ocean seaice landice inland_water (Type is String)
    • flag_values: 1, 2, 3, 4, 5 (Type is Int32)
    • valid_min: 1 (Type is Int32)
    • valid_max: 5 (Type is Int32)
ds_va_bin_h[ /ds_va_bin_h= 0..699] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • long_name: VA Bin Height Dimension Scale (Type is String)
    • description: Dimension scale containing the heights of the vertically-aligned bins. (Type is String)
    • source: Atmosphere ATBD (Type is String)
    • valid_min: 1. (Type is Float32)
    • valid_max: 700. (Type is Float32)
orbit_info(Type is Group)
  • attributes
    • Description: Contains orbit information. (Type is String)
    • data_rate: Varies. Data are only provided when one of the stored values (besides time) changes. (Type is String)
Dimensions: [ /orbit_info/delta_time = 0..0 ] [ /orbit_info/sc_orient_time = 0..0 ]
  • sc_orient_time[ /orbit_info/sc_orient_time= 0..0] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Time of Last Spacecraft Orientation Change (Type is String)
      • standard_name: time (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)
      • source: POD/PPD (Type is String)
      • coordinates: delta_time (Type is String)
  • delta_time[ /orbit_info/delta_time= 0..0] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Elapsed GPS seconds (Type is String)
      • standard_name: time (Type is String)
      • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
      • source: Operations (Type is String)
  • orbit_number[ /orbit_info/delta_time= 0..0] (Type is UInt16)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Orbit Number (Type is String)
      • description: Unique identifying number for each planned ICESat-2 orbit. (Type is String)
      • source: Operations (Type is String)
      • coordinates: delta_time (Type is String)
      • valid_min: 1 (Type is UInt16)
      • valid_max: 65000 (Type is UInt16)
  • sc_orient[ /orbit_info/sc_orient_time= 0..0] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Spacecraft Orientation (Type is String)
      • description: This parameter tracks the spacecraft orientation between between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode. (Type is String)
      • source: POD/PPD (Type is String)
      • coordinates: sc_orient_time (Type is String)
      • flag_meanings: backward forward transition (Type is String)
      • flag_values: 0, 1, 2 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 2 (Type is Int8)
  • rgt[ /orbit_info/delta_time= 0..0] (Type is Int16)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Reference Ground track (Type is String)
      • description: The reference ground track (RGT) is the track on the earth at which a specified unit vector within the observatory is pointed. Under nominal operating conditions, there will be no data collected along the RGT, as the RGT is spanned by GT3 and GT4. During slews or off-pointing, it is possible that ground tracks may intersect the RGT. The ICESat-2 mission has 1387 RGTs. (Type is String)
      • source: Operations (Type is String)
      • coordinates: delta_time (Type is String)
      • valid_min: 1 (Type is Int16)
      • valid_max: 1387 (Type is Int16)
  • cycle_number[ /orbit_info/delta_time= 0..0] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Cycle Number (Type is String)
      • description: A count of the number of exact repeats of this reference orbit. (Type is String)
      • source: Operations (Type is String)
      • coordinates: delta_time (Type is String)
      • valid_min: 0 (Type is Int8)
      • valid_max: 50 (Type is Int8)
METADATA(Type is Group)
  • attributes
    • Description: ISO19115 Structured Metadata Represented within HDF5 (Type is String)
    • iso_19139_dataset_xml: <?xml version="1.0"?> <gmd:DS_Series xsi:schemaLocation="http://www.isotc211.org/2005/gmi http://cdn.earthdata.nasa.gov/iso/schema/1.0/ISO19115-2_EOS.xsd" xmlns:eos="http://earthdata.nasa.gov/schema/eos" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gmi="http://www.isotc211.org/2005/gmi" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:gmx="http://www.isotc211.org/2005/gmx" xmlns:gsr="http://www.isotc211.org/2005/gsr" xmlns:gss="http://www.isotc211.org/2005/gss" xmlns:gts="http://www.isotc211.org/2005/gts" xmlns:srv="http://www.isotc211.org/2005/srv" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <gmd:composedOf> <gmd:DS_DataSet> <gmd:has> <gmi:MI_Metadata> <gmd:fileIdentifier> <gmx:FileName>ATL04_20151028T061609_00970301_941_01.h5</gmx:FileName> </gmd:fileIdentifier> <gmd:contact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC &gt; National Snow and Ice Data Center DAAC</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:address> <gmd:CI_Address> <gmd:electronicMailAddress> <gco:CharacterString>nsidc@nsidc.org</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/daac/</gmd:URL> </gmd:linkage> </gmd:CI_OnlineResource> </gmd:onlineResource> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:contact> <gmd:dateStamp> <gco:DateTime>2018-01-17T03:29:38.000000Z</gco:DateTime> </gmd:dateStamp> <gmd:metadataStandardName> <gco:CharacterString>ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data</gco:CharacterString> </gmd:metadataStandardName> <gmd:metadataStandardVersion> <gco:CharacterString>ISO 19115-2:2009-02-15</gco:CharacterString> </gmd:metadataStandardVersion> <gmd:identificationInfo> <gmd:MD_DataIdentification> <gmd:citation> <gmd:CI_Citation> <gmd:title> <gmx:FileName>ATL04_20151028T061609_00970301_941_01.h5</gmx:FileName> </gmd:title> <gmd:date> <gmd:CI_Date> <gmd:date> <gco:DateTime>2018-01-17T03:29:38.000000Z</gco:DateTime> </gmd:date> <gmd:dateType> <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="creation">creation</gmd:CI_DateTypeCode> </gmd:dateType> </gmd:CI_Date> </gmd:date> <gmd:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ATL04</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Short Name</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>001</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Version ID</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ATL04_20151028T061609_00970301_941_01.h5</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>ProducerGranuleId</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> </gmd:CI_Citation> </gmd:citation> <gmd:abstract> <gco:CharacterString>The ICESat-2 ATL04 standard data product contains along-track atmosphere backscatter data at full instrument resolution. The product includes full 532 nm (14 km) uncalibrated attenuated backscatter profiles at 25 times per second for vertical bins of approximately 30 meters. Also includes calibration coefficient values derived from data within the polar regions.</gco:CharacterString> </gmd:abstract> <gmd:status> <gmd:MD_ProgressCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="onGoing">onGoing</gmd:MD_ProgressCode> </gmd:status> <gmd:aggregationInfo> <gmd:MD_AggregateInformation> <gmd:aggregateDataSetName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ATL04</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:edition> <gco:CharacterString>001</gco:CharacterString> </gmd:edition> </gmd:CI_Citation> </gmd:aggregateDataSetName> <gmd:associationType> <gmd:DS_AssociationTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#DS_AssociationTypeCode" codeListValue="largerWorkCitation">largerWorkCitation</gmd:DS_AssociationTypeCode> </gmd:associationType> </gmd:MD_AggregateInformation> </gmd:aggregationInfo> <gmd:language> <gco:CharacterString>eng</gco:CharacterString> </gmd:language> <gmd:topicCategory> <gmd:MD_TopicCategoryCode>geoscientificInformation</gmd:MD_TopicCategoryCode> </gmd:topicCategory> <gmd:extent> <gmd:EX_Extent> <gmd:geographicElement> <gmd:EX_GeographicBoundingBox> <gmd:extentTypeCode> <gco:Boolean>true</gco:Boolean> </gmd:extentTypeCode> <gmd:westBoundLongitude> <gco:Decimal>-170.881747</gco:Decimal> </gmd:westBoundLongitude> <gmd:eastBoundLongitude> <gco:Decimal>-162.746543</gco:Decimal> </gmd:eastBoundLongitude> <gmd:southBoundLatitude> <gco:Decimal> -0.001290</gco:Decimal> </gmd:southBoundLatitude> <gmd:northBoundLatitude> <gco:Decimal> 49.782643</gco:Decimal> </gmd:northBoundLatitude> </gmd:EX_GeographicBoundingBox> </gmd:geographicElement> <gmd:temporalElement> <gmd:EX_TemporalExtent> <gmd:extent> <gml:TimePeriod gml:id="TIME_PERIOD_ID"> <gml:beginPosition>2015-10-28T06:16:09.167998Z</gml:beginPosition> <gml:endPosition>2015-10-28T06:29:30.288021Z</gml:endPosition> </gml:TimePeriod> </gmd:extent> </gmd:EX_TemporalExtent> </gmd:temporalElement> </gmd:EX_Extent> </gmd:extent> </gmd:MD_DataIdentification> </gmd:identificationInfo> <gmd:dataQualityInfo> <gmd:DQ_DataQuality> <gmd:scope> <gmd:DQ_Scope> <gmd:level> <gmd:MD_ScopeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode> </gmd:level> </gmd:DQ_Scope> </gmd:scope> <gmd:lineage> <gmd:LI_Lineage> <gmd:processStep> <gmi:LE_ProcessStep> <gmd:description> <gco:CharacterString>2018-01-17T03:29:38.000000Z;A67E7ACC-34AE-406F-DFF5-1CDB5944AD88;Created by PGE atlas_l2a_atm Version 3.1</gco:CharacterString> </gmd:description> <gmd:dateTime> <gco:DateTime>2018-01-17T03:29:38.000000Z</gco:DateTime> </gmd:dateTime> </gmi:LE_ProcessStep> </gmd:processStep> </gmd:LI_Lineage> </gmd:lineage> </gmd:DQ_DataQuality> </gmd:dataQualityInfo> </gmi:MI_Metadata> </gmd:has> </gmd:DS_DataSet> </gmd:composedOf> <gmd:seriesMetadata gco:nilReason="missing"/> </gmd:DS_Series> (Type is String)
    • iso_19139_series_xml: <?xml version="1.0" encoding="UTF-8"?> <gmd:DS_Series xmlns:eos="http://earthdata.nasa.gov/schema/eos" xmlns:gco="http://www.isotc211.org/2005/gco" xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gmi="http://www.isotc211.org/2005/gmi" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:gmx="http://www.isotc211.org/2005/gmx" xmlns:gsr="http://www.isotc211.org/2005/gsr" xmlns:gss="http://www.isotc211.org/2005/gss" xmlns:gts="http://www.isotc211.org/2005/gts" xmlns:srv="http://www.isotc211.org/2005/srv" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.isotc211.org/2005/gmi http://cdn.earthdata.nasa.gov/iso/schema/1.0/ISO19115-2_EOS.xsd"> <gmd:composedOf gco:nilReason="inapplicable"/> <gmd:seriesMetadata> <gmi:MI_Metadata> <gmd:fileIdentifier> <gco:CharacterString>ATL04.001</gco:CharacterString> </gmd:fileIdentifier> <gmd:language> <gco:CharacterString>eng</gco:CharacterString> </gmd:language> <gmd:characterSet> <gmd:MD_CharacterSetCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_CharacterSetCode" codeListValue="utf8">utf8</gmd:MD_CharacterSetCode> </gmd:characterSet> <gmd:hierarchyLevel> <gmd:MD_ScopeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_ScopeCode" codeListValue="series">series</gmd:MD_ScopeCode> </gmd:hierarchyLevel> <gmd:contact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC &gt; NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact id="NSIDC_DAAC_CONTACT_ID"> <gmd:phone> <gmd:CI_Telephone> <gmd:voice> <gco:CharacterString>303-492-6199</gco:CharacterString> </gmd:voice> <gmd:facsimile> <gco:CharacterString>303-492-2468</gco:CharacterString> </gmd:facsimile> </gmd:CI_Telephone> </gmd:phone> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>1540 30th St Campus Box 449</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Boulder</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>Colorado</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>80309-0449</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>nsidc@nsidc.org</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/daac/</gmd:URL> </gmd:linkage> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:hoursOfService> <gco:CharacterString>9:00 A.M. to 5:00 P.M., U.S. Mountain Time, Monday through Friday, excluding U.S. holidays.</gco:CharacterString> </gmd:hoursOfService> <gmd:contactInstructions> <gco:CharacterString>Contact by e-mail first</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="pointOfContact">pointOfContact</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:contact> <gmd:dateStamp> <gco:Date>2015-10-15</gco:Date> </gmd:dateStamp> <gmd:metadataStandardName> <gco:CharacterString>ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data</gco:CharacterString> </gmd:metadataStandardName> <gmd:metadataStandardVersion> <gco:CharacterString>ISO 19115-2:2009(E)</gco:CharacterString> </gmd:metadataStandardVersion> <gmd:identificationInfo> <gmd:MD_DataIdentification> <gmd:citation> <gmd:CI_Citation> <!-- ECS extracts the LongName from here --> <!-- UMM-C expects the ShortName to precede the LongName separated by a &gt; here --> <gmd:title> <gco:CharacterString>ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles</gco:CharacterString> </gmd:title> <gmd:date> <gmd:CI_Date> <!-- ECS extracts the RevisionDate from here --> <gmd:date> <gco:Date>2016-06-09</gco:Date> </gmd:date> <gmd:dateType> <gmd:CI_DateTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode> </gmd:dateType> </gmd:CI_Date> </gmd:date> <!-- VersionID is expected to be here by the Base Reference Metadata Model document --> <gmd:edition> <gco:CharacterString>001</gco:CharacterString> </gmd:edition> <gmd:identifier> <gmd:MD_Identifier> <!-- ECS extracts the ShortName from here --> <gmd:code> <gco:CharacterString>ATL04</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Short Name</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <!-- ECS extracts the VersionID from here --> <gmd:code> <gco:CharacterString>001</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>The ECS Version ID</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:identifier> <gmd:MD_Identifier> <!-- This field provides the Digital Object Identifier (DOI). --> <gmd:code> <gmx:Anchor xlink:actuate="onRequest" xlink:href="http://dx.doi.org/10.5067/ATLAS/ATL04.001">doi:10.5067/ATLAS/ATL04.001</gmx:Anchor> </gmd:code> <gmd:codeSpace> <gco:CharacterString>gov.nasa.esdis</gco:CharacterString> </gmd:codeSpace> <gmd:description> <gco:CharacterString>A Digital Object Identifier (DOI)</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmd:identifier> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>National Aeronautics and Space Administration (NASA)</gco:CharacterString> </gmd:organisationName> <gmd:role> <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="resourceProvider">resourceProvider</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty> <!-- ECS expects ProcessingCenter to be here --> <gmd:organisationName> <gco:CharacterString>GSFC I-SIPS &gt; ICESat-2 Science Investigator-led Processing System</gco:CharacterString> </gmd:organisationName> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="originator">originator</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <!-- ECS extracts the VersionDescription from here --> <gmd:otherCitationDetails> <gco:CharacterString>Initial version of the processing software</gco:CharacterString> </gmd:otherCitationDetails> </gmd:CI_Citation> </gmd:citation> <!-- ECS extracts the CollectionDescription from here --> <gmd:abstract> <gco:CharacterString>ATL04 contains along-track atmosphere backscatter data at full instrument resolution. The product includes full 532 nm (14 km) uncalibrated attenuated backscatter profiles at 25 times per second for vertical bins of approximately 30 meters. Includes calibration coefficient values derived from data within the polar regions.</gco:CharacterString> </gmd:abstract> <gmd:purpose> <gco:CharacterString>The purpose of ATL04 is to provide normalized relative backscatter and ancillary meteorological and atmosphere data that will be used by to create the upstream ATL09 product.</gco:CharacterString> </gmd:purpose> <gmd:credit> <gco:CharacterString>The software that generates the ATL04 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland.</gco:CharacterString> </gmd:credit> <gmd:status> <gmd:MD_ProgressCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="onGoing">onGoing</gmd:MD_ProgressCode> </gmd:status> <gmd:pointOfContact> <gmd:CI_ResponsibleParty> <!-- ECS expects ArchiveCenter to be here --> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC &gt; NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo xlink:href="#NSIDC_DAAC_CONTACT_ID"/> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:pointOfContact> <gmd:resourceFormat> <gmd:MD_Format> <gmd:name> <gco:CharacterString>HDF</gco:CharacterString> </gmd:name> <gmd:version> <gco:CharacterString>5</gco:CharacterString> </gmd:version> </gmd:MD_Format> </gmd:resourceFormat> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>EARTH SCIENCE &gt; SPECTRAL/ENGINEERING &gt; LIDAR &gt; LIDAR BACKSCATTER &gt; NONE &gt; NONE &gt; NONE</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="theme">theme</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Science Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty id="GCMD_USO_ID"> <gmd:organisationName> <gco:CharacterString>NASA Global Change Master Directory (GCMD) User Support Office</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:phone gco:nilReason="missing"/> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>NASA Global Change Master Directory, Goddard Space Flight Center</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Greenbelt</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>MD</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>20771</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>gcmduso@gcmd.gsfc.nasa.gov</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://gcmd.nasa.gov/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</gco:CharacterString> </gmd:protocol> <gmd:applicationProfile> <gco:CharacterString>web browser</gco:CharacterString> </gmd:applicationProfile> <gmd:name> <gco:CharacterString>NASA Global Change Master Directory (GCMD)</gco:CharacterString> </gmd:name> <gmd:description> <gco:CharacterString>Home Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:contactInstructions> <gco:CharacterString>http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <gmd:citedResponsibleParty> <gmd:CI_ResponsibleParty id="GCMD_KEYWORDS_ID"> <gmd:organisationName> <gco:CharacterString>Global Change Master Directory (GCMD)</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo> <gmd:CI_Contact> <gmd:phone gco:nilReason="missing"/> <gmd:address> <gmd:CI_Address> <gmd:deliveryPoint> <gco:CharacterString>NASA Global Change Master Directory, Goddard Space Flight Center</gco:CharacterString> </gmd:deliveryPoint> <gmd:city> <gco:CharacterString>Greenbelt</gco:CharacterString> </gmd:city> <gmd:administrativeArea> <gco:CharacterString>MD</gco:CharacterString> </gmd:administrativeArea> <gmd:postalCode> <gco:CharacterString>20771</gco:CharacterString> </gmd:postalCode> <gmd:country> <gco:CharacterString>USA</gco:CharacterString> </gmd:country> <gmd:electronicMailAddress> <gco:CharacterString>gcmduso@gcmd.gsfc.nasa.gov</gco:CharacterString> </gmd:electronicMailAddress> </gmd:CI_Address> </gmd:address> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://gcmd.nasa.gov/Resources/valids/</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</gco:CharacterString> </gmd:protocol> <gmd:applicationProfile> <gco:CharacterString>web browser</gco:CharacterString> </gmd:applicationProfile> <gmd:name> <gco:CharacterString>NASA Global Change Master Directory (GCMD) Keyword Page</gco:CharacterString> </gmd:name> <gmd:description> <gco:CharacterString>This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions.</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onlineResource> <gmd:contactInstructions> <gco:CharacterString>http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso</gco:CharacterString> </gmd:contactInstructions> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>GEOGRAPHIC REGION &gt; GLOBAL</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="place">place</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Location Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>NASA/NSIDC_DAAC &gt; NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="dataCenter">dataCenter</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Data Center Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>Earth Observation Satellites &gt; NASA Decadal Survey &gt; ICESAT-2 &gt; Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="platform">platform</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Platform Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:descriptiveKeywords> <gmd:MD_Keywords> <gmd:keyword> <gco:CharacterString>Earth Remote Sensing Instruments &gt; Active Remote Sensing &gt; Altimeters &gt; Lidar/Laser Altimeters &gt; ATLAS &gt; Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:keyword> <gmd:type> <gmd:MD_KeywordTypeCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_KeywordTypeCode" codeListValue="instrument">instrument</gmd:MD_KeywordTypeCode> </gmd:type> <gmd:thesaurusName> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>NASA/GCMD Instrument Keywords</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> <gmd:citedResponsibleParty xlink:href="#GCMD_USO_ID"/> <gmd:citedResponsibleParty xlink:href="#GCMD_KEYWORDS_ID"/> </gmd:CI_Citation> </gmd:thesaurusName> </gmd:MD_Keywords> </gmd:descriptiveKeywords> <gmd:resourceConstraints> <gmd:MD_Constraints> <gmd:useLimitation> <gco:CharacterString>Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center.</gco:CharacterString> </gmd:useLimitation> </gmd:MD_Constraints> </gmd:resourceConstraints> <gmd:language> <gco:CharacterString>eng</gco:CharacterString> </gmd:language> <gmd:topicCategory> <gmd:MD_TopicCategoryCode>geoscientificInformation</gmd:MD_TopicCategoryCode> </gmd:topicCategory> <gmd:extent> <gmd:EX_Extent> <gmd:geographicElement> <gmd:EX_GeographicBoundingBox> <!-- ECS extracts WestBoundingCoordinate from here --> <gmd:westBoundLongitude> <gco:Decimal>-180.0</gco:Decimal> </gmd:westBoundLongitude> <!-- ECS extracts EastBoundingCoordinate from here --> <gmd:eastBoundLongitude> <gco:Decimal>180.0</gco:Decimal> </gmd:eastBoundLongitude> <!-- ECS extracts SouthBoundingCoordinate from here --> <gmd:southBoundLatitude> <gco:Decimal>-90.0</gco:Decimal> </gmd:southBoundLatitude> <!-- ECS extracts NorthBoundingCoordinate from here --> <gmd:northBoundLatitude> <gco:Decimal>90.0</gco:Decimal> </gmd:northBoundLatitude> </gmd:EX_GeographicBoundingBox> </gmd:geographicElement> <gmd:temporalElement> <gmd:EX_TemporalExtent> <gmd:extent> <gml:TimePeriod gml:id="TimePeriod_ID_1"> <!-- ECS extracts RangeBeginningDate and RangeBeginningTime from here --> <gml:beginPosition>2005-01-01T00:00:00Z</gml:beginPosition> <!-- ECS extracts RangeEndingDate and RangeEndingTime from here --> <gml:endPosition>2020-12-31T23:59:59Z</gml:endPosition> </gml:TimePeriod> </gmd:extent> </gmd:EX_TemporalExtent> </gmd:temporalElement> </gmd:EX_Extent> </gmd:extent> <gmd:processingLevel> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>2A</gco:CharacterString> </gmd:code> <gmd:description gco:nilReason="missing"/> </gmd:MD_Identifier> </gmd:processingLevel> </gmd:MD_DataIdentification> </gmd:identificationInfo> <gmd:contentInfo> <gmd:MD_ImageDescription> <gmd:attributeDescription gco:nilReason="missing"/> <gmd:contentType gco:nilReason="missing"/> <gmd:processingLevelCode> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>2A</gco:CharacterString> </gmd:code> <gmd:description gco:nilReason="missing"/> </gmd:MD_Identifier> </gmd:processingLevelCode> </gmd:MD_ImageDescription> </gmd:contentInfo> <gmd:distributionInfo> <gmd:MD_Distribution> <gmd:distributionFormat> <gmd:MD_Format> <gmd:name> <gco:CharacterString>HDF</gco:CharacterString> </gmd:name> <gmd:version> <gco:CharacterString>5</gco:CharacterString> </gmd:version> </gmd:MD_Format> </gmd:distributionFormat> <gmd:distributor> <gmd:MD_Distributor> <gmd:distributorContact> <gmd:CI_ResponsibleParty> <gmd:organisationName> <gco:CharacterString>NSIDC DAAC &gt; NASA National Snow and Ice Data Center Distributed Active Archive Center</gco:CharacterString> </gmd:organisationName> <gmd:contactInfo xlink:href="#NSIDC_DAAC_CONTACT_ID"/> <gmd:role> <gmd:CI_RoleCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="distributor">distributor</gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:distributorContact> <gmd:distributorTransferOptions> <gmd:MD_DigitalTransferOptions> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/data/icesat2/data.html</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Data Product Description Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://nsidc.org/data/icesat2/order.html</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Data Product Order Page</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="order">order</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> <gmd:onLine> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL>http://dx.doi.org/10.5067/ATLAS/ATL04.001</gmd:URL> </gmd:linkage> <gmd:protocol> <gco:CharacterString>http</gco:CharacterString> </gmd:protocol> <gmd:description> <gco:CharacterString>Digital Object Identifier URL</gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information">information</gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onLine> </gmd:MD_DigitalTransferOptions> </gmd:distributorTransferOptions> </gmd:MD_Distributor> </gmd:distributor> </gmd:MD_Distribution> </gmd:distributionInfo> <gmi:acquisitionInformation> <gmi:MI_AcquisitionInformation> <gmi:instrument> <eos:EOS_Instrument id="ATLAS_INSTRUMENT_ID"> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ATLAS &gt; Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ATLAS</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Advanced Topographic Laser Altimeter System</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:type> <gco:CharacterString>Laser Altimeter</gco:CharacterString> </gmi:type> <gmi:description> <gco:CharacterString>ATLAS on ICESat-2 determines the range between the satellite and the Earth's surface by measuring the two-way time delay of short pulses of laser light that it transmits in six beams. It is different from previous operational ice-sheet altimeters in that it is a photon-counting LIDAR. ATLAS records a set of arrival times for individual photons, which are then analyzed to derive surface, vegetation, and cloud properties. ATLAS has six beams arranged in three pairs, so that it samples each of three reference pair tracks with a pair of beams; ATLAS transmits pulses at 10 kHz, giving approximately one pulse every 0.7 m along track; ATLAS's expected pointing control will be better than 90 m RMS.</gco:CharacterString> </gmi:description> <gmi:mountedOn xlink:href="#ICESAT_2_PLATFORM_ID"/> </eos:EOS_Instrument> </gmi:instrument> <gmi:operation> <!-- MI_Operation is expected to be here by the Base Reference Metadata Model document--> <gmi:MI_Operation> <gmi:description> <gco:CharacterString>ICESat-2 &gt; Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmi:description> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ICESat-2 &gt; Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ICESat-2</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:status> <gmd:MD_ProgressCode codeList="http://cdn.earthdata.nasa.gov/iso/resources/Codelist/gmxCodelists.xml#MD_ProgressCode" codeListValue="underDevelopment">underDevelopment</gmd:MD_ProgressCode> </gmi:status> <gmi:parentOperation gco:nilReason="inapplicable"/> <gmi:platform xlink:href="#ICESAT_2_PLATFORM_ID"/> </gmi:MI_Operation> </gmi:operation> <gmi:platform> <eos:EOS_Platform id="ICESAT_2_PLATFORM_ID"> <gmi:citation> <gmd:CI_Citation> <gmd:title> <gco:CharacterString>ICESat-2 &gt; Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:title> <gmd:date gco:nilReason="unknown"/> </gmd:CI_Citation> </gmi:citation> <gmi:identifier> <gmd:MD_Identifier> <gmd:code> <gco:CharacterString>ICESat-2</gco:CharacterString> </gmd:code> <gmd:description> <gco:CharacterString>Ice, Cloud, and land Elevation Satellite-2</gco:CharacterString> </gmd:description> </gmd:MD_Identifier> </gmi:identifier> <gmi:description> <gco:CharacterString>Spacecraft</gco:CharacterString> </gmi:description> <gmi:instrument xlink:href="#ATLAS_INSTRUMENT_ID"/> </eos:EOS_Platform> </gmi:platform> </gmi:MI_AcquisitionInformation> </gmi:acquisitionInformation> </gmi:MI_Metadata> </gmd:seriesMetadata> </gmd:DS_Series> (Type is String)
  • AcquisitionInformation(Type is Group)
    no attributes
    • lidar(Type is Group)
      • attributes
        • pulse_rate: 10000 pps (Type is String)
        • wavelength: 532 nm (Type is String)
        • identifier: ATLAS (Type is String)
        • type: Laser Altimeter (Type is String)
        • description: ATLAS on ICESat-2 determines the range between the satellite and the Earth's surface by measuring the two-way time delay of short pulses of laser light that it transmits in six beams. It is different from previous operational ice-sheet altimeters in that it is a photon-counting LIDAR. ATLAS records a set of arrival times for individual photons, which are then analyzed to derive surface, vegetation, and cloud properties. ATLAS has six beams arranged in three pairs, so that it samples each of three reference pair tracks with a pair of beams; ATLAS transmits pulses at 10 kHz, giving approximately one pulse every 0.7 m along track; ATLAS's expected pointing control will be better than 90 m RMS. (Type is String)
    • lidarDocument(Type is Group)
      • attributes
        • edition: Pre-Release (Type is String)
        • publicationDate: 12/31/17 (Type is String)
        • title: A document describing the ATLAS instrument will be provided by the ICESat-2 Project Science Office. (Type is String)
    • platform(Type is Group)
      • attributes
        • identifier: ICESat-2 (Type is String)
        • description: Ice, Cloud, and land Elevation Satellite-2 (Type is String)
        • type: Spacecraft (Type is String)
    • platformDocument(Type is Group)
      • attributes
        • edition: 31-Dec-16 (Type is String)
        • publicationDate: 31-Dec-16 (Type is String)
        • title: The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2): Science requirements, concept, and implementation. Thorsten Markus, Tom Neumann, Anthony Martino, Waleed Abdalati, Kelly Brunt, Beata Csatho, Sinead Farrell, Helen Fricker, Alex Gardner, David Harding, Michael Jasinski, Ron Kwok, Lori Magruder, Dan Lubin, Scott Luthcke, James Morison, Ross Nelson, Amy Neuenschwander, Stephen Palm, Sorin Popescu, CK Shum, Bob E. Schutz, Benjamin Smith, Yuekui Yang, Jay Zwally. http://dx.doi.org/10.1016/j.rse.2016.12.029 (Type is String)
  • DataQuality(Type is Group)
    • attributes
      • scope: NOT_SET (Type is String)
    • CompletenessOmission(Type is Group)
      • attributes
        • evaluationMethodType: directInternal (Type is String)
        • measureDescription: TBD (Type is String)
        • nameOfMeasure: TBD (Type is String)
        • unitofMeasure: TBD (Type is String)
        • value: NOT_SET (Type is String)
    • DomainConsistency(Type is Group)
      • attributes
        • evaluationMethodType: directInternal (Type is String)
        • measureDesciption: TBD (Type is String)
        • nameOfMeasure: TBD (Type is String)
        • unitofMeasure: TBD (Type is String)
        • value: NOT_SET (Type is String)
  • ProductSpecificationDocument(Type is Group)
    • attributes
      • characterSet: utf8 (Type is String)
      • edition: Revision C (Type is String)
      • language: eng (Type is String)
      • publicationDate: 12/1/2017 (Type is String)
      • ShortName: ATL04_SDP (Type is String)
      • title: ICESat-2-SIPS-SPEC-4259 - ATLAS Science Algorithm Standard Data Product (SDP) Volume 4 (ATL04). Revision C. (Type is String)
  • SeriesIdentification(Type is Group)
    • attributes
      • maintenanceAndUpdateFrequency: asNeeded (Type is String)
      • maintenanceDate: SET_BY_META (Type is String)
      • VersionID: 941 (Type is String)
      • identifier_product_DOI: 10.5067/ATLAS/ATL04.001 (Type is String)
      • language: eng (Type is String)
      • characterSet: utf8 (Type is String)
      • pointOfContact: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String)
      • longName: ATLAS/ICESat-2 L2A Normalized Relative Backscatter Profiles (Type is String)
      • shortName: ATL04 (Type is String)
      • revisionDate: 2016-06-09 (Type is String)
      • resourceProviderOrganizationName: National Aeronautics and Space Administration (NASA) (Type is String)
      • abstract: ATL04 contains along-track atmosphere backscatter data at full instrument resolution. The product includes full 532 nm (14 km) uncalibrated attenuated backscatter profiles at 25 times per second for vertical bins of approximately 30 meters. Includes calibration coefficient values derived from data within the polar regions. (Type is String)
      • purpose: The purpose of ATL04 is to provide normalized relative backscatter and ancillary meteorological and atmosphere data that will be used by to create the upstream ATL09 product. (Type is String)
      • credit: The software that generates the ATL04 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String)
      • status: onGoing (Type is String)
      • format: HDF (Type is String)
      • formatVersion: 5 (Type is String)
      • topicCategory: geoscientificInformation (Type is String)
      • mission: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
  • DatasetIdentification(Type is Group)
    • attributes
      • spatialRepresentationType: along-track (Type is String)
      • creationDate: 2018-01-17T03:29:38.000000Z (Type is String)
      • uuid: A67E7ACC-34AE-406F-DFF5-1CDB5944AD88 (Type is String)
      • fileName: ATL04_20151028T061609_00970301_941_01.h5 (Type is String)
      • VersionID: 941 (Type is String)
      • language: eng (Type is String)
      • characterSet: utf8 (Type is String)
      • shortName: ATL04 (Type is String)
      • originatorOrganizationName: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String)
      • abstract: ATL04 contains along-track atmosphere backscatter data at full instrument resolution. The product includes full 532 nm (14 km) uncalibrated attenuated backscatter profiles at 25 times per second for vertical bins of approximately 30 meters. Includes calibration coefficient values derived from data within the polar regions. (Type is String)
      • purpose: The purpose of ATL04 is to provide normalized relative backscatter and ancillary meteorological and atmosphere data that will be used by to create the upstream ATL09 product. (Type is String)
      • credit: The software that generates the ATL04 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String)
      • status: onGoing (Type is String)
      • topicCategory: geoscientificInformation (Type is String)
  • Extent(Type is Group)
    • attributes
      • northBoundLatitude: 49.78264272926922 (Type is Float64)
      • eastBoundLongitude: -162.74654264353322 (Type is Float64)
      • southBoundLatitude: -0.0012902707602664538 (Type is Float64)
      • westBoundLongitude: -170.88174733051255 (Type is Float64)
      • rangeBeginningDateTime: 2015-10-28T06:16:09.207998Z (Type is String)
      • rangeEndingDateTime: 2015-10-28T06:29:30.248021Z (Type is String)
  • QADatasetIdentification(Type is Group)
    • attributes
      • abstract: An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule (Type is String)
      • creationDate: 2018-01-17T03:30:11.000000Z (Type is String)
      • fileName: ATL04_20151028T061609_00970301_941_01.h5.qa (Type is String)
  • Lineage(Type is Group)
    no attributes
    • ANC25-04(Type is Group)
      • attributes
        • description: HDF5 template file that defines the organization and default content of the product. (Type is String)
        • fileName: atl04_template.h5 (Type is String)
        • shortName: ANC25-04 (Type is String)
        • uuid: 1880D7F1-7F1F-4F36-A0C0-B492BF82424F (Type is String)
        • version: 001 (Type is String)
    • Control(Type is Group)
      • attributes
        • description: Text-based keyword=value file generated automatically within the ICESat-2 data system that specifies all of the conditions required for each individual run of the software. (Type is String)
        • fileName: cf_atlas_l2a_atm_0097_03_01.ctl (Type is String)
        • shortName: CNTL (Type is String)
        • version: 1 (Type is String)
    • ANC28(Type is Group)
      • attributes
        • description: DTU10 Mean Sea Surface reformatted into HDF5. (Type is String)
        • fileName: dtu10_20140218_001_01.h5 (Type is String)
        • shortName: ANC28 (Type is String)
        • uuid: FB84D076-0F68-4C2B-A576-C9DF9BC79E4C (Type is String)
        • version: 001 (Type is String)
    • ANC38-04(Type is Group)
      • attributes
        • description: ISO 19139 XML file containing DataSet-level metadata information. (Type is String)
        • fileName: DsESDTAtATL04.001.dataset.xml (Type is String)
        • shortName: ANC38-04 (Type is String)
        • uuid: 95BF65A6-F1E7-445E-9E94-ADD030917038 (Type is String)
        • version: 001 (Type is String)
    • ANC06-02(Type is Group)
      • attributes
        • description: GIMP Digital Elevation Model reformatted into HDF5. (Type is String)
        • fileName: gimp30m_20140609_003_01.h5 (Type is String)
        • shortName: ANC06-02 (Type is String)
        • uuid: 8FB4F997-A9BC-48A3-9C3F-5248B86E45C3 (Type is String)
        • version: 001 (Type is String)
    • ANC09(Type is Group)
      • attributes
        • description: IGBP surface type file (Type is String)
        • fileName: gigbp2_0ll.img (Type is String)
        • shortName: ANC09 (Type is String)
        • uuid: 7E06B60C-E194-45DF-896A-9E3E6CE308C6 (Type is String)
        • version: 001 (Type is String)
    • ANC36-04(Type is Group)
      • attributes
        • description: ISO 19139 XML file containing Series-level metadata information. (Type is String)
        • fileName: DsESDTAtATL04.001.series.xml (Type is String)
        • shortName: ANC36-04 (Type is String)
        • uuid: 5BFCCB48-D68E-4897-92C6-389DE6A1C32B (Type is String)
        • version: 001 (Type is String)
    • ANC39(Type is Group)
      • attributes
        • description: Intermediate ancillary file produced by the ICESat-2 atlas_l2a_alt PGE as an input to the atlas_l2a_atm PGE. (Type is String)
        • fileName: ANC39_20151028T061609_00970301_941_01.h5, ANC39_20151028T062322_00970302_941_01.h5 (Type is String)
        • shortName: ANC39, ANC39 (Type is String)
        • uuid: 58B2D1B4-8663-4AAC-9676-33810D187B9E, FE977CBB-9979-4DD1-D042-BBEE196A6845 (Type is String)
        • version: 941, 941 (Type is String)
        • start_cycle: 3, 3 (Type is Int32)
        • end_cycle: 3, 3 (Type is Int32)
        • start_orbit: 2871, 2871 (Type is Int32)
        • end_orbit: 2871, 2871 (Type is Int32)
        • start_rgt: 97, 97 (Type is Int32)
        • end_rgt: 97, 97 (Type is Int32)
        • start_region: 1, 2 (Type is Int32)
        • end_region: 1, 2 (Type is Int32)
        • start_geoseg: 1, 150475 (Type is Int32)
        • end_geoseg: 150474, 332618 (Type is Int32)
    • ANC26-04(Type is Group)
      • attributes
        • description: HDF5 template file that defines the organization and default content of the product metadata. (Type is String)
        • fileName: atl04_metadata_template.h5 (Type is String)
        • shortName: ANC26-04 (Type is String)
        • uuid: 7E3F303E-3583-4275-9471-68B8826DC492 (Type is String)
        • version: 001 (Type is String)
    • ANC06-01(Type is Group)
      • attributes
        • description: GMTED Digital Elevation Model reformatted into HDF5. (Type is String)
        • fileName: gmted75_20140609_003_01.h5 (Type is String)
        • shortName: ANC06-01 (Type is String)
        • uuid: 7166107B-1668-43BF-9778-A59E2C34CACA (Type is String)
        • version: 001 (Type is String)
    • ANC19(Type is Group)
      • attributes
        • description: TAI to UTC leapsecond file retrieved from ftp://maia.usno.navy.mil/ser7/tai-utc.dat (Type is String)
        • fileName: tai-utc.dat (Type is String)
        • shortName: ANC19 (Type is String)
        • uuid: 1B17F4A6-AE26-4FC4-862A-BF283C488602 (Type is String)
        • version: 001 (Type is String)
    • ANC10(Type is Group)
      • attributes
        • description: GEOS5 FPIT 2D (Type is String)
        • fileName: DAS.fpit.asm.tavg1_2d_slv_Nx.GEOS591.20140225_0530.V01.nc4, DAS.fpit.asm.tavg1_2d_slv_Nx.GEOS591.20140225_0630.V01.nc4, DAS.fpit.asm.tavg1_2d_slv_Nx.GEOS591.20140225_0730.V01.nc4 (Type is String)
        • shortName: ANC10, ANC10, ANC10 (Type is String)
        • uuid: NOT_SET, NOT_SET, NOT_SET (Type is String)
        • version: 01, 01, 01 (Type is String)
  • ProcessStep(Type is Group)
    no attributes
    • Browse(Type is Group)
      • attributes
        • processDescription: Browse processing is performed for each granule SIPS produces. The browse utility reads data from the granule and produces browse images as defined in the respective product ATBD. The utility then embeds each browse image into the product within the /Browse group. (Type is String)
        • identifier: atlas_brw (Type is String)
        • softwareVersion: Version 1.1 (Type is String)
        • softwareDate: Jan 13 2018 (Type is String)
        • softwareTitle: Creates ATLAS HDF5 browse files (Type is String)
        • runTimeParameters: cf_atlas_l2a_atm_0097_03_01.ctl (Type is String)
        • stepDateTime: 2018-01-17T03:30:14.000000Z (Type is String)
    • Metadata(Type is Group)
      • attributes
        • processDescription: Metadata information is processed by the metadata utility for each granule produced by SIPS. During PGE processing, dynamic metadata are written to the product. Additional static information is provided with the metadata template. The metadata utility reads ISO Dataset and Series metadata files and updates the product with static information from within those files. The utility then merges the static and dynamic metadata to creates output ISO19139 Dataset and Series XML files. Finally the utility reads the ISO19139 Dataset and Series XML files into memory and stores the textual representations as attributes attached to the /METADATA group. (Type is String)
        • identifier: atlas_meta (Type is String)
        • softwareVersion: Version 3.1 (Type is String)
        • softwareDate: Jan 13 2018 (Type is String)
        • softwareTitle: Creates ATLAS XML metadata files (Type is String)
        • runTimeParameters: cf_atlas_l2a_atm_0097_03_01.ctl (Type is String)
        • stepDateTime: 2018-01-17T03:30:40.000000Z (Type is String)
    • PGE(Type is Group)
      • attributes
        • ATBDDate: 11/15/2017 (Type is String)
        • ATBDTitle: ICESat-2-SIPS-SPEC-1607 - SIPs: Atmosphere Products L5 Specification Document (Type is String)
        • ATBDVersion: Version 7.3 (Type is String)
        • documentation: ICESat-2-SIPS-SPEC-2327 - ATLAS Science Algorithm Software Design Description (SDD) Volume 8 (atlas_l2a_atm). Revision C. (Type is String)
        • documentDate: 12/1/2017 (Type is String)
        • processDescription: Computes Uncalibrated Backscatter Profiles determined by ATBD Algorithm using POD and PPD (Type is String)
        • identifier: atlas_l2a_atm (Type is String)
        • softwareVersion: Version 3.1 (Type is String)
        • softwareDate: Jan 13 2018 (Type is String)
        • softwareTitle: ASAS L2A ATM PGE (Type is String)
        • runTimeParameters: cf_atlas_l2a_atm_0097_03_01.ctl (Type is String)
        • stepDateTime: 2018-01-17T03:29:38.000000Z (Type is String)
    • QA(Type is Group)
      • attributes
        • processDescription: QA processing is performed by an external utility on each granule produced by SIPS. The utility reads the granule, performs both generic and product-specific quality-assessment calculations, and writes a text-based quality assessment report. The name and creation data of this report are identified within the QADatasetIdentification metadata (Type is String)
        • identifier: atl04_qa_util (Type is String)
        • softwareVersion: Version 3.1 (Type is String)
        • softwareDate: Jan 13 2018 (Type is String)
        • softwareTitle: ATL04 QA Utility (Type is String)
        • runTimeParameters: cf_atlas_l2a_atm_0097_03_01.ctl (Type is String)
        • stepDateTime: 2018-01-17T03:30:11.000000Z (Type is String)
profile_1(Type is Group)
  • attributes
    • Description: Each group contains the segments for the strong beam of one Pair Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 14m. The Atmosphere profiles are only reported for the strong beam. Profiles are numbered from the left to the right in the direction of spacecraft travel as: 1 for the left-most pair of beams; 2 for the center pair of beams; and 3 for the right-most pair of beams. (Type is String)
    • data_rate: Data in this group is stored at a 25hz (25 per second) rate. (Type is String)
    • atlas_pce: pce3 (Type is String)
    • atlas_beam_type: strong (Type is String)
    • groundtrack_id: gt1r (Type is String)
    • atmosphere_profile: profile_1 (Type is String)
    • atlas_spot_number: 5 (Type is String)
    • sc_orientation: Forward (Type is String)
Dimensions: [ /profile_1/delta_time = 0..20026 ]
  • delta_time[ /profile_1/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Elapsed GPS seconds (Type is String)
      • standard_name: time (Type is String)
      • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: latitude, longitude (Type is String)
  • sig_count_med[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Medium (Type is String)
      • description: Count of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev1[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 1 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dem_flag[ /profile_1/delta_time= 0..20026] (Type is Int8)
    • attributes
      • _FillValue: 127 (Type is Int8)
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Source Flag (Type is String)
      • description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: none gimp gmted mss (Type is String)
      • flag_values: 0, 1, 2, 3 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 3 (Type is Int8)
  • backg_max_bin1[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 1 (Type is String)
      • description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_low[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Low (Type is String)
      • description: Count of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method1[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 1 (Type is String)
      • description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_hi[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -High (Type is String)
      • description: SDev of the heights of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac1[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor1 (Type is String)
      • description: Dead time correction factor for surface signal computed from radiometric lookup table. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • atm_tw_top[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Telemetry Window Top (Type is String)
      • description: The geolocated ellipsoidal height at the top of the Atmospheric range window (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_hi[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of SignalHeights - High (Type is String)
      • description: Mean height of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
  • beam_azimuth[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam azimuth (Type is String)
      • description: Beam azimuth (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • range_to_top[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Range (Type is String)
      • description: Range from the spacecraft to the top of the atmosphere range window. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_azimuth[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar azimuth (Type is String)
      • description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • longitude[ /profile_1/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Longitude of the ATM histogram (Type is String)
      • standard_name: longitude (Type is String)
      • description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude (Type is String)
      • valid_min: -180. (Type is Float64)
      • valid_max: 180. (Type is Float64)
  • backg_max_bin2[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 2 (Type is String)
      • description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • latitude[ /profile_1/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_north (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Latitude of the ATM histogram (Type is String)
      • standard_name: latitude (Type is String)
      • description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, longitude (Type is String)
      • valid_min: -90. (Type is Float64)
      • valid_max: 90. (Type is Float64)
  • surf_type[ /profile_1/delta_time= 0..20026] [ /ds_surf_type= 0..4] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Surface Type (Type is String)
      • description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. (Type is String)
      • source: ATL03 ATBD, Section 4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: not_type is_type (Type is String)
      • flag_values: 0, 1 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 1 (Type is Int8)
  • atm_rw_width_m[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: seconds (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Range Window Width (Type is String)
      • description: The range, in meters, from the Atmospheric range window start to the range window stop. (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method3[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 3 (Type is String)
      • description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surf_type_igbp[ /profile_1/delta_time= 0..20026] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • long_name: IGBP Surface Type (Type is String)
      • description: IGBP Surface Type (Type is String)
      • source: Atmosphere ATBD, IGBP Surface Type (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: referenceInformation (Type is String)
  • sig_h_mean_med[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signa Heightsl - Med (Type is String)
      • description: Mean height of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max1[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • long_name: Background signal max 1 (Type is String)
      • description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: modelResult (Type is String)
  • dem_h[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Height (Type is String)
      • description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • tx_pulse_energy[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: Joules (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Transmit Pulse Energy (Type is String)
      • description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. (Type is String)
      • source: ATL02 ATBD, Section 7.2 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_height[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface height (Type is String)
      • description: Height of the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_profile[ /profile_1/delta_time= 0..20026] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile (Type is String)
      • description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_mean2[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Signal mean (Type is String)
      • description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_y[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Across Track Distance from RGT (Type is String)
      • description: Across-Track distance from the reference ground track. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • beam_elevation[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam elevation (Type is String)
      • description: Beam elevation (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • segment_id[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: along-track segment ID number. (Type is String)
      • description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. (Type is String)
      • source: ATL03 ATBD, Section 3.1 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_bin[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface bin (Type is String)
      • description: Vertially aligned, NRB bin number of the detected surface return. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_elevation[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar elevation (Type is String)
      • description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_hi[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signa Heightsl - High (Type is String)
      • description: Count of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac2[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor2 (Type is String)
      • description: Dead time correction factor for surface signal computed from ATBD equation 2.1. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_x[ /profile_1/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Along Track Distance (Type is String)
      • description: Along-track distance from the equator crossing. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max2[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background signal max 2 (Type is String)
      • description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev2[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 2 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method2[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 2 (Type is String)
      • description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • pce_mframe_cnt[ /profile_1/delta_time= 0..20026] (Type is UInt32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: PCE Major frame counter (Type is String)
      • description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sc_alt[ /profile_1/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: physicalMeasurement (Type is String)
      • long_name: Altitude (Type is String)
      • description: Height of the spacecraft above the WGS84 ellipsoid. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_low[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -Low (Type is String)
      • description: SDev of the heights of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_low[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signal Heights - Low (Type is String)
      • description: Mean height of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_med[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signa Heights -Med (Type is String)
      • description: SDev of the heights of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_bot_bin[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile bottom valid bin (Type is String)
      • description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_sig[ /profile_1/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface signal count (Type is String)
      • description: Number of photons in the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_top_bin[ /profile_1/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile top valid bin (Type is String)
      • description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • bckgrd_atlas(Type is Group)
    • attributes
      • Description: Contains the ATLAS 50-shot background data and derivations. (Type is String)
    Dimensions: [ /profile_1/bckgrd_atlas/delta_time = 0..160207 ]
    • delta_time[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Elapsed GPS seconds (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: ATLAS 50-shot background count (Type is String)
        • description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts_reduced[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • long_name: ATLAS 50-shot background count - reduced (Type is String)
        • description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
        • contentType: modelResult (Type is String)
    • bckgrd_hist_top[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Top of the altimetric range window (Type is String)
        • description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window width (Type is String)
        • description: The height of the altimetric range window. This is the height over which the 50-shot sum is generated. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height_reduced[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window height - reduced (Type is String)
        • description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_rate[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: counts / second (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Background count rate based on the ATLAS 50-shot sum (Type is String)
        • description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • pce_mframe_cnt[ /profile_1/bckgrd_atlas/delta_time= 0..160207] (Type is UInt32)
      • attributes
        • units: counts (Type is String)
        • contentType: referenceInformation (Type is String)
        • long_name: PCE Major frame counter (Type is String)
        • description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
        • source: ATL02 (Type is String)
        • coordinates: delta_time (Type is String)
  • calibration(Type is Group)
    • attributes
      • Description: Contains calibration data associated with a PCE strong beam. (Type is String)
      • data_rate: Data within this group stored at a low rate corresponding to the number of times ATLAS passes with the calibration boundary conditions (lat > 60 and solar_angle > 90)/ (Type is String)
    Dimensions: [ /profile_1/calibration/delta_time = 0..0 ]
    • delta_time[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: latitude, longitude (Type is String)
    • cal_ozone_trans[ /profile_1/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Ozone transmission used (Type is String)
        • description: Ozone transmission term used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c_trans[ /profile_1/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: total transmission used (Type is String)
        • description: The total transmission used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start longitude (Type is String)
        • standard_name: longitude (Type is String)
        • description: Start Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
    • latitude_end[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end latitude (Type is String)
        • description: Stop Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
    • latitude[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • long_name: Calibration interval start Latitude (Type is String)
        • standard_name: latitude (Type is String)
        • description: Start Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
        • contentType: modelResult (Type is String)
    • cal_molec[ /profile_1/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: m-1 sr-1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Molecular Backscatter used (Type is String)
        • description: Molecular Backscatter value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c[ /profile_1/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: Photons*m^3 *sr / J (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calculated Calibration constant (Type is String)
        • description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • delta_time_end[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_con[ /profile_1/calibration/delta_time= 0..0] (Type is Int32)
      • attributes
        • _FillValue: 2147483647 (Type is Int32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration Confidence (Type is String)
        • description: Calibration Confidence (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_nrb[ /profile_1/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: NRB value used (Type is String)
        • description: NRB value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude_end[ /profile_1/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end longitude (Type is String)
        • description: Stop Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
profile_3(Type is Group)
  • attributes
    • Description: Each group contains the segments for the strong beam of one Pair Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 14m. The Atmosphere profiles are only reported for the strong beam. Profiles are numbered from the left to the right in the direction of spacecraft travel as: 1 for the left-most pair of beams; 2 for the center pair of beams; and 3 for the right-most pair of beams. (Type is String)
    • data_rate: Data in this group is stored at a 25hz (25 per second) rate. (Type is String)
    • atlas_pce: pce1 (Type is String)
    • atlas_beam_type: strong (Type is String)
    • groundtrack_id: gt3r (Type is String)
    • atmosphere_profile: profile_3 (Type is String)
    • atlas_spot_number: 1 (Type is String)
    • sc_orientation: Forward (Type is String)
Dimensions: [ /profile_3/delta_time = 0..20026 ]
  • delta_time[ /profile_3/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Elapsed GPS seconds (Type is String)
      • standard_name: time (Type is String)
      • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: latitude, longitude (Type is String)
  • sig_count_med[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Medium (Type is String)
      • description: Count of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev1[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 1 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dem_flag[ /profile_3/delta_time= 0..20026] (Type is Int8)
    • attributes
      • _FillValue: 127 (Type is Int8)
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Source Flag (Type is String)
      • description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: none gimp gmted mss (Type is String)
      • flag_values: 0, 1, 2, 3 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 3 (Type is Int8)
  • backg_max_bin1[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 1 (Type is String)
      • description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_low[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Low (Type is String)
      • description: Count of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method1[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 1 (Type is String)
      • description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_hi[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -High (Type is String)
      • description: SDev of the heights of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac1[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor1 (Type is String)
      • description: Dead time correction factor for surface signal computed from radiometric lookup table. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • atm_tw_top[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Telemetry Window Top (Type is String)
      • description: The geolocated ellipsoidal height at the top of the Atmospheric range window (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_hi[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of SignalHeights - High (Type is String)
      • description: Mean height of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
  • beam_azimuth[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam azimuth (Type is String)
      • description: Beam azimuth (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • range_to_top[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Range (Type is String)
      • description: Range from the spacecraft to the top of the atmosphere range window. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_azimuth[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar azimuth (Type is String)
      • description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • longitude[ /profile_3/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Longitude of the ATM histogram (Type is String)
      • standard_name: longitude (Type is String)
      • description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude (Type is String)
      • valid_min: -180. (Type is Float64)
      • valid_max: 180. (Type is Float64)
  • backg_max_bin2[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 2 (Type is String)
      • description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • latitude[ /profile_3/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_north (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Latitude of the ATM histogram (Type is String)
      • standard_name: latitude (Type is String)
      • description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, longitude (Type is String)
      • valid_min: -90. (Type is Float64)
      • valid_max: 90. (Type is Float64)
  • surf_type[ /profile_3/delta_time= 0..20026] [ /ds_surf_type= 0..4] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Surface Type (Type is String)
      • description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. (Type is String)
      • source: ATL03 ATBD, Section 4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: not_type is_type (Type is String)
      • flag_values: 0, 1 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 1 (Type is Int8)
  • atm_rw_width_m[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: seconds (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Range Window Width (Type is String)
      • description: The range, in meters, from the Atmospheric range window start to the range window stop. (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method3[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 3 (Type is String)
      • description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surf_type_igbp[ /profile_3/delta_time= 0..20026] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • long_name: IGBP Surface Type (Type is String)
      • description: IGBP Surface Type (Type is String)
      • source: Atmosphere ATBD, IGBP Surface Type (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: referenceInformation (Type is String)
  • sig_h_mean_med[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signa Heightsl - Med (Type is String)
      • description: Mean height of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max1[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • long_name: Background signal max 1 (Type is String)
      • description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: modelResult (Type is String)
  • dem_h[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Height (Type is String)
      • description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • tx_pulse_energy[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: Joules (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Transmit Pulse Energy (Type is String)
      • description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. (Type is String)
      • source: ATL02 ATBD, Section 7.2 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_height[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface height (Type is String)
      • description: Height of the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_profile[ /profile_3/delta_time= 0..20026] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile (Type is String)
      • description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_mean2[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Signal mean (Type is String)
      • description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_y[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Across Track Distance from RGT (Type is String)
      • description: Across-Track distance from the reference ground track. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • beam_elevation[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam elevation (Type is String)
      • description: Beam elevation (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • segment_id[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: along-track segment ID number. (Type is String)
      • description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. (Type is String)
      • source: ATL03 ATBD, Section 3.1 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_bin[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface bin (Type is String)
      • description: Vertially aligned, NRB bin number of the detected surface return. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_elevation[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar elevation (Type is String)
      • description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_hi[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signa Heightsl - High (Type is String)
      • description: Count of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac2[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor2 (Type is String)
      • description: Dead time correction factor for surface signal computed from ATBD equation 2.1. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_x[ /profile_3/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Along Track Distance (Type is String)
      • description: Along-track distance from the equator crossing. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max2[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background signal max 2 (Type is String)
      • description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev2[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 2 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method2[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 2 (Type is String)
      • description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • pce_mframe_cnt[ /profile_3/delta_time= 0..20026] (Type is UInt32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: PCE Major frame counter (Type is String)
      • description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sc_alt[ /profile_3/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: physicalMeasurement (Type is String)
      • long_name: Altitude (Type is String)
      • description: Height of the spacecraft above the WGS84 ellipsoid. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_low[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -Low (Type is String)
      • description: SDev of the heights of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_low[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signal Heights - Low (Type is String)
      • description: Mean height of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_med[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signa Heights -Med (Type is String)
      • description: SDev of the heights of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_bot_bin[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile bottom valid bin (Type is String)
      • description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_sig[ /profile_3/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface signal count (Type is String)
      • description: Number of photons in the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_top_bin[ /profile_3/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile top valid bin (Type is String)
      • description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • bckgrd_atlas(Type is Group)
    • attributes
      • Description: Contains the ATLAS 50-shot background data and derivations. (Type is String)
    Dimensions: [ /profile_3/bckgrd_atlas/delta_time = 0..160207 ]
    • delta_time[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Elapsed GPS seconds (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: ATLAS 50-shot background count (Type is String)
        • description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts_reduced[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • long_name: ATLAS 50-shot background count - reduced (Type is String)
        • description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
        • contentType: modelResult (Type is String)
    • bckgrd_hist_top[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Top of the altimetric range window (Type is String)
        • description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window width (Type is String)
        • description: The height of the altimetric range window. This is the height over which the 50-shot sum is generated. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height_reduced[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window height - reduced (Type is String)
        • description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_rate[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: counts / second (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Background count rate based on the ATLAS 50-shot sum (Type is String)
        • description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • pce_mframe_cnt[ /profile_3/bckgrd_atlas/delta_time= 0..160207] (Type is UInt32)
      • attributes
        • units: counts (Type is String)
        • contentType: referenceInformation (Type is String)
        • long_name: PCE Major frame counter (Type is String)
        • description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
        • source: ATL02 (Type is String)
        • coordinates: delta_time (Type is String)
  • calibration(Type is Group)
    • attributes
      • Description: Contains calibration data associated with a PCE strong beam. (Type is String)
      • data_rate: Data within this group stored at a low rate corresponding to the number of times ATLAS passes with the calibration boundary conditions (lat > 60 and solar_angle > 90)/ (Type is String)
    Dimensions: [ /profile_3/calibration/delta_time = 0..0 ]
    • delta_time[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: latitude, longitude (Type is String)
    • cal_ozone_trans[ /profile_3/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Ozone transmission used (Type is String)
        • description: Ozone transmission term used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c_trans[ /profile_3/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: total transmission used (Type is String)
        • description: The total transmission used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start longitude (Type is String)
        • standard_name: longitude (Type is String)
        • description: Start Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
    • latitude_end[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end latitude (Type is String)
        • description: Stop Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
    • latitude[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • long_name: Calibration interval start Latitude (Type is String)
        • standard_name: latitude (Type is String)
        • description: Start Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
        • contentType: modelResult (Type is String)
    • cal_molec[ /profile_3/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: m-1 sr-1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Molecular Backscatter used (Type is String)
        • description: Molecular Backscatter value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c[ /profile_3/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: Photons*m^3 *sr / J (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calculated Calibration constant (Type is String)
        • description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • delta_time_end[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_con[ /profile_3/calibration/delta_time= 0..0] (Type is Int32)
      • attributes
        • _FillValue: 2147483647 (Type is Int32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration Confidence (Type is String)
        • description: Calibration Confidence (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_nrb[ /profile_3/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: NRB value used (Type is String)
        • description: NRB value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude_end[ /profile_3/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end longitude (Type is String)
        • description: Stop Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
quality_assessment(Type is Group)
  • attributes
    • Description: Contains quality assessment data. This may include QA counters, QA along-track data and/or QA summary data. (Type is String)
  • qa_granule_fail_reason[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: qualityInformation (Type is String)
      • description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD_Failure; 5=other failure. (Type is String)
      • source: Operations (Type is String)
      • flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE (Type is String)
      • flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32)
      • valid_min: 0 (Type is Int32)
      • valid_max: 5 (Type is Int32)
      • long_name: Granule Failure Reason (Type is String)
  • qa_granule_pass_fail[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: qualityInformation (Type is String)
      • description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String)
      • source: Operations (Type is String)
      • flag_meanings: PASS FAIL (Type is String)
      • flag_values: 0, 1 (Type is Int32)
      • valid_min: 0 (Type is Int32)
      • valid_max: 1 (Type is Int32)
      • long_name: Granule Pass Flag (Type is String)
meteorology_molec_bkscat(Type is Group)
  • attributes
    • Description: Contains sampled GEOS5_FPIT meteorological model data and molecular backscatter. This data is created from the time/locations of the center profile. (Type is String)
    • data_rate: Data in this group is stored at a 1hz (1 per second) rate. (Type is String)
Dimensions: [ /meteorology_molec_bkscat/delta_time = 0..801 ]
  • delta_time[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Elapsed GPS seconds (Type is String)
      • standard_name: time (Type is String)
      • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: latitude, longitude (Type is String)
  • mol_backs_folded[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: m-1 sr-1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Folded molecular transmission profile (Type is String)
      • description: Folded molecular transmission profile, 30 m resolution, , m-1 sr-1; 20 km to -1 km (equation 3.17) (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • ozone_trans[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Ozone transmission profile (Type is String)
      • description: Ozone transmission profile, 30 m resolution, 20 km to -1 km (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • molec_bkscat_p[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: Pa (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Pressure profile (Type is String)
      • description: Pressure profiles from 20 km to -1 km (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_t2m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: K (Type is String)
      • long_name: temperature_at_2m (Type is String)
      • standard_name: temperature (Type is String)
      • description: Temperature at 2m above the displacement height (K) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: referenceInformation (Type is String)
  • met_u2m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Eastward_wind_at_2m (Type is String)
      • standard_name: eastward_wind (Type is String)
      • description: Eastward wind at 2m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_u10m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Eastward_wind_at_10m (Type is String)
      • standard_name: eastward_wind (Type is String)
      • description: Eastward wind at 10m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • molec_trans[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Molecular transmission profile (Type is String)
      • description: Molecular transmission profile, 30 m resolution, 20 km to -1 km (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_cldprs[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: Pa (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: cloud_top_pressure (Type is String)
      • standard_name: pressure (Type is String)
      • description: Pressure of the highest cloud top at this location from GEOS5 data (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_v50m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: northward_wind_at_50m (Type is String)
      • standard_name: northward_wind (Type is String)
      • description: Northward wind at 50m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_v10m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Northward_wind_at_10m (Type is String)
      • standard_name: northward_wind (Type is String)
      • description: Northward wind at 10m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • longitude[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float64)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Longitude of the ATM histogram (Type is String)
      • standard_name: longitude (Type is String)
      • description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude (Type is String)
      • valid_min: -180. (Type is Float64)
      • valid_max: 180. (Type is Float64)
  • met_ps[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: Pa (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Surface Pressure (Type is String)
      • standard_name: pressure (Type is String)
      • description: Surface Pressure (Pa) (Type is String)
      • source: GEOS5 FPIT 3D DFPITI3NVASM (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • latitude[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float64)
    • attributes
      • units: degrees_north (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Latitude of the ATM histogram (Type is String)
      • standard_name: latitude (Type is String)
      • description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, longitude (Type is String)
      • valid_min: -90. (Type is Float64)
      • valid_max: 90. (Type is Float64)
  • surf_type[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_surf_type= 0..4] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Surface Type (Type is String)
      • description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. (Type is String)
      • source: ATL03 ATBD, Section 4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: not_type is_type (Type is String)
      • flag_values: 0, 1 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 1 (Type is Int8)
  • met_qv10m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: kg kg-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: specific_humidity_at_10m (Type is String)
      • standard_name: specific_humidity (Type is String)
      • description: Specific humidity at 10 m above the displacement height (Pa) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_tqi[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: kg m2 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: cloud_ice (Type is String)
      • description: Total column cloud ice (Kg/m2) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_t10m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: K (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: temperature_at_10m (Type is String)
      • standard_name: temperature (Type is String)
      • description: Temperature at 10m above the displacement height (K) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_tql[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: kg m2 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: cloud_liquid_water (Type is String)
      • description: Total column cloud liquid water (kg/m2) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_v2m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Northward_wind_at_2m (Type is String)
      • standard_name: northward_wind (Type is String)
      • description: Northward wind at 2m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_ts[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: K (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: surface_temperature (Type is String)
      • standard_name: temperature (Type is String)
      • description: Surface skin temperature (K) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • segment_id[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: along-track segment ID number. (Type is String)
      • description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. (Type is String)
      • source: ATL03 ATBD, Section 3.1 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_qv2m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: kg kg-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: specific_humidity_at_2m (Type is String)
      • standard_name: specific_humidity (Type is String)
      • description: Specific humidity at 2 m above the displacement height (Pa) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_tropt[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: K (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: blended_tropopause_temperature (Type is String)
      • standard_name: temperature (Type is String)
      • description: Tropopause temperature (k) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • molec_bkscat_t[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: degreesC (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Temperature profile (Type is String)
      • description: Temperature profiles from 20 km to -1 km (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_u50m[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: m s-1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Eastward_wind_at_50m (Type is String)
      • standard_name: eastward_wind (Type is String)
      • description: Eastward wind at 50m above the displacement height (m/s-1) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • met_troppb[ /meteorology_molec_bkscat/delta_time= 0..801] (Type is Float32)
    • attributes
      • units: Pa (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: blended_tropopause_pressure (Type is String)
      • standard_name: pressure (Type is String)
      • description: Blended tropopause pressure (pa) (Type is String)
      • source: GEOS5 FPIT 2D DFPITT1NXSLV (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • mol_backscatter[ /meteorology_molec_bkscat/delta_time= 0..801] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • units: m-1 sr-1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Molecular backscatter profile (Type is String)
      • description: Molecular backscatter profile, 30 m resolution, 20 km to -1 km (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
profile_2(Type is Group)
  • attributes
    • Description: Each group contains the segments for the strong beam of one Pair Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 14m. The Atmosphere profiles are only reported for the strong beam. Profiles are numbered from the left to the right in the direction of spacecraft travel as: 1 for the left-most pair of beams; 2 for the center pair of beams; and 3 for the right-most pair of beams. (Type is String)
    • data_rate: Data in this group is stored at a 25hz (25 per second) rate. (Type is String)
    • atlas_pce: pce2 (Type is String)
    • atlas_beam_type: strong (Type is String)
    • groundtrack_id: gt2r (Type is String)
    • atmosphere_profile: profile_2 (Type is String)
    • atlas_spot_number: 3 (Type is String)
    • sc_orientation: Forward (Type is String)
Dimensions: [ /profile_2/delta_time = 0..20026 ]
  • delta_time[ /profile_2/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: seconds since 2018-01-01 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Elapsed GPS seconds (Type is String)
      • standard_name: time (Type is String)
      • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: latitude, longitude (Type is String)
  • sig_count_med[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Medium (Type is String)
      • description: Count of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev1[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 1 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dem_flag[ /profile_2/delta_time= 0..20026] (Type is Int8)
    • attributes
      • _FillValue: 127 (Type is Int8)
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Source Flag (Type is String)
      • description: Indicates source of the DEM height. Values: 0=None, 1=GIMP, 2=GMTED, 3=MSS. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: none gimp gmted mss (Type is String)
      • flag_values: 0, 1, 2, 3 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 3 (Type is Int8)
  • backg_max_bin1[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 1 (Type is String)
      • description: Background maximum bin from the selected method used. (Binmax1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_low[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signal Heights - Low (Type is String)
      • description: Count of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method1[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 1 (Type is String)
      • description: Background from method 1in photons/bin. (pb1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_hi[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -High (Type is String)
      • description: SDev of the heights of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac1[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor1 (Type is String)
      • description: Dead time correction factor for surface signal computed from radiometric lookup table. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • atm_tw_top[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Telemetry Window Top (Type is String)
      • description: The geolocated ellipsoidal height at the top of the Atmospheric range window (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_hi[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of SignalHeights - High (Type is String)
      • description: Mean height of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
  • beam_azimuth[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam azimuth (Type is String)
      • description: Beam azimuth (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • range_to_top[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Range (Type is String)
      • description: Range from the spacecraft to the top of the atmosphere range window. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_azimuth[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar azimuth (Type is String)
      • description: The direction, eastwards from north, of the sun vector as seen by an observer at the laser ground spot. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • longitude[ /profile_2/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_east (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Longitude of the ATM histogram (Type is String)
      • standard_name: longitude (Type is String)
      • description: Longitude at the the top of the ATM histogram, WGS84, East=+, derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude (Type is String)
      • valid_min: -180. (Type is Float64)
      • valid_max: 180. (Type is Float64)
  • backg_max_bin2[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background max bin 2 (Type is String)
      • description: Background maximum bin2 from the selected method used. (Binmax2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • latitude[ /profile_2/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: degrees_north (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Latitude of the ATM histogram (Type is String)
      • standard_name: latitude (Type is String)
      • description: Latitude at the the top of the ATM histogram, WGS84, North=+, Derived from the geolocation of the ATM range window. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, longitude (Type is String)
      • valid_min: -90. (Type is Float64)
      • valid_max: 90. (Type is Float64)
  • surf_type[ /profile_2/delta_time= 0..20026] [ /ds_surf_type= 0..4] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Surface Type (Type is String)
      • description: Flags describing which surface types this interval is associated with. 0=not type, 1=is type. Order of array is land, ocean, sea ice, land ice, inland water. (Type is String)
      • source: ATL03 ATBD, Section 4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • flag_meanings: not_type is_type (Type is String)
      • flag_values: 0, 1 (Type is Int8)
      • valid_min: 0 (Type is Int8)
      • valid_max: 1 (Type is Int8)
  • atm_rw_width_m[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: seconds (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Atmospheric Range Window Width (Type is String)
      • description: The range, in meters, from the Atmospheric range window start to the range window stop. (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method3[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 3 (Type is String)
      • description: Background from method 3 in photons/bin. (Defined in Atmosphere ATBD section 3.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surf_type_igbp[ /profile_2/delta_time= 0..20026] (Type is Int8)
    • attributes
      • units: 1 (Type is String)
      • long_name: IGBP Surface Type (Type is String)
      • description: IGBP Surface Type (Type is String)
      • source: Atmosphere ATBD, IGBP Surface Type (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: referenceInformation (Type is String)
  • sig_h_mean_med[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signa Heightsl - Med (Type is String)
      • description: Mean height of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max1[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • long_name: Background signal max 1 (Type is String)
      • description: Background signal ma1x, in photons/bin, from the selectd method used. (Sm1 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
      • contentType: modelResult (Type is String)
  • dem_h[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: DEM Height (Type is String)
      • description: Best available DEM (in priority of GIMP/GMTED/MSS) value at the geolocation point. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • tx_pulse_energy[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: Joules (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Transmit Pulse Energy (Type is String)
      • description: The average transmit pulse energy recorded by the Start Pulse Detector, split into per-beam measurements. (Type is String)
      • source: ATL02 ATBD, Section 7.2 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_height[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface height (Type is String)
      • description: Height of the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_profile[ /profile_2/delta_time= 0..20026] [ /ds_va_bin_h= 0..699] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile (Type is String)
      • description: Normalize relative backscatter (NRB) profile vertically aligned to 20 to -1 km with vertical resolution of 30 m. (Photons km2/Joule) (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_mean2[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Signal mean (Type is String)
      • description: Signal mean from method 2 (pb2 defined in Atmosphere ATBD part 1 section 2.3.4) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_y[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Across Track Distance from RGT (Type is String)
      • description: Across-Track distance from the reference ground track. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • beam_elevation[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: beam elevation (Type is String)
      • description: Beam elevation (Type is String)
      • source: ATL03 ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • segment_id[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: along-track segment ID number. (Type is String)
      • description: A 7 digit number identifiying the along-track geolocation segment number. These are sequential, starting with 1 for the first segment after an ascending equatorial crossing node. (Type is String)
      • source: ATL03 ATBD, Section 3.1 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_bin[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface bin (Type is String)
      • description: Vertially aligned, NRB bin number of the detected surface return. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • solar_elevation[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: degrees (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: solar elevation (Type is String)
      • description: Solar Angle above or below the plane tangent to the ellipsoid surface at the laser spot. Positive values mean the sun is above the horizon, while negative values mean it is below the horizon. The effect of atmospheric refraction is not included. This is a low precision value, with approximately TBD degree accuracy. (Type is String)
      • source: ATL03g ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_count_hi[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Count of Signa Heightsl - High (Type is String)
      • description: Count of high-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • dtime_fac2[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: dead_time_factor2 (Type is String)
      • description: Dead time correction factor for surface signal computed from ATBD equation 2.1. (Type is String)
      • source: Atmosphere ATBD (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • prof_dist_x[ /profile_2/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Along Track Distance (Type is String)
      • description: Along-track distance from the equator crossing. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_signal_max2[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background signal max 2 (Type is String)
      • description: Background signal max2, in photons/bin, from the selectd method used. (Sm2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_std_dev2[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background standard deviation 2 (Type is String)
      • description: Background standard deviation from the selected method used (Sstd2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • backg_method2[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Background method 2 (Type is String)
      • description: Background from method 2 in photons/bin. (pb2 Defined in Atmosphere ATBD section 2.3.2) (Type is String)
      • source: Atmosphere ATBD section 3.3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • pce_mframe_cnt[ /profile_2/delta_time= 0..20026] (Type is UInt32)
    • attributes
      • units: counts (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: PCE Major frame counter (Type is String)
      • description: Major Frame Counter - The major frame counter is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
      • source: ATL02 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sc_alt[ /profile_2/delta_time= 0..20026] (Type is Float64)
    • attributes
      • units: meters (Type is String)
      • contentType: physicalMeasurement (Type is String)
      • long_name: Altitude (Type is String)
      • description: Height of the spacecraft above the WGS84 ellipsoid. (Type is String)
      • source: ATL03g ATBD, Section 3.4 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_low[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signal Heights -Low (Type is String)
      • description: SDev of the heights of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_mean_low[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: Mean of Signal Heights - Low (Type is String)
      • description: Mean height of low-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • sig_h_sdev_med[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • _FillValue: 3.402823466e+38 (Type is Float32)
      • units: meters (Type is String)
      • contentType: referenceInformation (Type is String)
      • long_name: SDev of Signa Heights -Med (Type is String)
      • description: SDev of the heights of medium-confidence signal photons (Type is String)
      • source: ATL03 ATBD, Section 5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_bot_bin[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: 1 (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile bottom valid bin (Type is String)
      • description: The ending (bottom) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • surface_sig[ /profile_2/delta_time= 0..20026] (Type is Float32)
    • attributes
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: Surface signal count (Type is String)
      • description: Number of photons in the detected surface bin. (Type is String)
      • source: Atmosphere ATBD section 3.3.5 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • nrb_top_bin[ /profile_2/delta_time= 0..20026] (Type is Int32)
    • attributes
      • _FillValue: 2147483647 (Type is Int32)
      • units: counts (Type is String)
      • contentType: modelResult (Type is String)
      • long_name: NRB Profile top valid bin (Type is String)
      • description: The starting (top) bin number within the 20 to -1 km vertically aligned profile where data are valid. Bin number starts at 1. (Type is String)
      • source: Atmosphere ATBD section 2.3 (Type is String)
      • coordinates: delta_time, latitude, longitude (Type is String)
  • bckgrd_atlas(Type is Group)
    • attributes
      • Description: Contains the ATLAS 50-shot background data and derivations. (Type is String)
    Dimensions: [ /profile_2/bckgrd_atlas/delta_time = 0..160207 ]
    • delta_time[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Elapsed GPS seconds (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: ATLAS 50-shot background count (Type is String)
        • description: Onboard 50 shot background (200 Hz) sum of photon events within the altimetric range window. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_counts_reduced[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • long_name: ATLAS 50-shot background count - reduced (Type is String)
        • description: Number of photon counts in the 50-shot sum after subtracting the number of signal photon events, defined as in ATBD Section 5, in that span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
        • contentType: modelResult (Type is String)
    • bckgrd_hist_top[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Top of the altimetric range window (Type is String)
        • description: The height of the top of the altimetric histogram, in meters above the WGS-84 ellipsoid, with all geophysical corrections applied. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window width (Type is String)
        • description: The height of the altimetric range window. This is the height over which the 50-shot sum is generated. Parameter is ingested at 50-Hz, and values are repeated to form a 200-Hz array. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_int_height_reduced[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Altimetric range window height - reduced (Type is String)
        • description: The height of the altimetric range window after subtracting the height span of the signal photon events in the 50-shot span. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • bckgrd_rate[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is Float32)
      • attributes
        • units: counts / second (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Background count rate based on the ATLAS 50-shot sum (Type is String)
        • description: The background count rate from the 50-shot altimetric histogram after removing the number of likely signal photons based on Section 5. (Type is String)
        • source: ATL03 ATBD Section 7.3 (Type is String)
        • coordinates: delta_time (Type is String)
    • pce_mframe_cnt[ /profile_2/bckgrd_atlas/delta_time= 0..160207] (Type is UInt32)
      • attributes
        • units: counts (Type is String)
        • contentType: referenceInformation (Type is String)
        • long_name: PCE Major frame counter (Type is String)
        • description: Major Frame ID - The major frame ID is read from the DFC and starts counting at DFC POR. The counter is used to identify individual major frames across diag and science packets. This counter can go for about 2.7 years before rolling over. It is in the first time tag science packet. Used as part of the photon ID (Type is String)
        • source: ATL02 (Type is String)
        • coordinates: delta_time (Type is String)
  • calibration(Type is Group)
    • attributes
      • Description: Contains calibration data associated with a PCE strong beam. (Type is String)
      • data_rate: Data within this group stored at a low rate corresponding to the number of times ATLAS passes with the calibration boundary conditions (lat > 60 and solar_angle > 90)/ (Type is String)
    Dimensions: [ /profile_2/calibration/delta_time = 0..0 ]
    • delta_time[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Derived via Time Tagging (Type is String)
        • coordinates: latitude, longitude (Type is String)
    • cal_ozone_trans[ /profile_2/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Ozone transmission used (Type is String)
        • description: Ozone transmission term used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c_trans[ /profile_2/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: total transmission used (Type is String)
        • description: The total transmission used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval start longitude (Type is String)
        • standard_name: longitude (Type is String)
        • description: Start Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
    • latitude_end[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end latitude (Type is String)
        • description: Stop Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
    • latitude[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_north (Type is String)
        • long_name: Calibration interval start Latitude (Type is String)
        • standard_name: latitude (Type is String)
        • description: Start Latitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, longitude (Type is String)
        • valid_min: -90. (Type is Float64)
        • valid_max: 90. (Type is Float64)
        • contentType: modelResult (Type is String)
    • cal_molec[ /profile_2/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: m-1 sr-1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Molecular Backscatter used (Type is String)
        • description: Molecular Backscatter value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_c[ /profile_2/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: Photons*m^3 *sr / J (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calculated Calibration constant (Type is String)
        • description: Calculated calibration constant (one per beam, Defined by Atmosphere ATBD eqn 3.27) (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • delta_time_end[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: seconds since 2018-01-01 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end time (Type is String)
        • standard_name: time (Type is String)
        • description: Number of GPS seconds since the ATLAS SDP epoch where the cal interval ended. The corresponding start time of the interval is delta_time. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_con[ /profile_2/calibration/delta_time= 0..0] (Type is Int32)
      • attributes
        • _FillValue: 2147483647 (Type is Int32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration Confidence (Type is String)
        • description: Calibration Confidence (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • cal_nrb[ /profile_2/calibration/delta_time= 0..0] (Type is Float32)
      • attributes
        • _FillValue: 3.402823466e+38 (Type is Float32)
        • units: 1 (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: NRB value used (Type is String)
        • description: NRB value used to compute cal_const. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
    • longitude_end[ /profile_2/calibration/delta_time= 0..0] (Type is Float64)
      • attributes
        • units: degrees_east (Type is String)
        • contentType: modelResult (Type is String)
        • long_name: Calibration interval end longitude (Type is String)
        • description: Stop Longitude of calibration interval. (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • coordinates: delta_time, latitude, longitude (Type is String)
        • valid_min: -180. (Type is Float64)
        • valid_max: 180. (Type is Float64)
ancillary_data(Type is Group)
  • attributes
    • Description: Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants. (Type is String)
    • data_rate: Data within this group pertain to the granule in its entirety. (Type is String)
  • release[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Release Number (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)
      • source: Operations (Type is String)
  • end_geoseg[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending Geolocation Segment (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)
      • source: Derived (Type is String)
  • version[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Version (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)
      • source: Operations (Type is String)
  • end_region[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending Region (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)
      • source: Derived (Type is String)
  • atlas_sdp_gps_epoch[ 0..0] (Type is Float64)
    • attributes
      • units: seconds since 1980-01-06T00:00:00.000000Z (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: ATLAS Epoch Offset (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)
      • source: Operations (Type is String)
  • end_rgt[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending Reference Groundtrack (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)
      • source: Derived (Type is String)
      • valid_min: 1 (Type is Int32)
      • valid_max: 1387 (Type is Int32)
  • end_orbit[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. (Type is String)
      • source: Derived (Type is String)
      • long_name: Ending Orbit Number (Type is String)
  • start_cycle[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Starting Cycle (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)
      • source: Derived (Type is String)
      • valid_min: 0 (Type is Int32)
      • valid_max: 99 (Type is Int32)
  • data_end_utc[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String)
      • description: UTC (in CCSDS-A format) of the last data point within the granule. (Type is String)
      • source: Derived (Type is String)
  • control[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Control File (Type is String)
      • description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. (Type is String)
      • source: Operations (Type is String)
  • start_gpssow[ 0..0] (Type is Float64)
    • attributes
      • units: seconds (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Start GPS SOW of Granule (Actual) (Type is String)
      • description: GPS seconds-of-week of the first data point in the granule. (Type is String)
      • source: Derived (Type is String)
  • granule_end_utc[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String)
      • description: Requested end time (in UTC CCSDS-A) of this granule. (Type is String)
      • source: Derived (Type is String)
  • end_cycle[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending Cycle (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)
      • source: Derived (Type is String)
      • valid_min: 0 (Type is Int32)
      • valid_max: 99 (Type is Int32)
  • granule_start_utc[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String)
      • description: Requested start time (in UTC CCSDS-A) of this granule. (Type is String)
      • source: Derived (Type is String)
  • start_geoseg[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Starting Geolocation Segment (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)
      • source: Derived (Type is String)
  • start_orbit[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Starting Orbit Number (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)
      • source: Derived (Type is String)
  • data_start_utc[ 0..0] (Type is String)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String)
      • description: UTC (in CCSDS-A format) of the first data point within the granule. (Type is String)
      • source: Derived (Type is String)
  • end_gpsweek[ 0..0] (Type is Int32)
    • attributes
      • units: weeks from 1980-01-06 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending GPSWeek of Granule (Actual) (Type is String)
      • description: GPS week number of the last data point in the granule. (Type is String)
      • source: Derived (Type is String)
  • start_rgt[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Starting Reference Groundtrack (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)
      • source: Derived (Type is String)
      • valid_min: 1 (Type is Int32)
      • valid_max: 1387 (Type is Int32)
  • end_gpssow[ 0..0] (Type is Float64)
    • attributes
      • units: seconds (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Ending GPS SOW of Granule (Actual) (Type is String)
      • description: GPS seconds-of-week of the last data point in the granule. (Type is String)
      • source: Derived (Type is String)
  • qa_at_interval[ 0..0] (Type is Float64)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: QA Along-Track Interval (Type is String)
      • description: Statistics time interval for along-track QA data. (Type is String)
      • source: control (Type is String)
  • start_region[ 0..0] (Type is Int32)
    • attributes
      • units: 1 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Starting Region (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)
      • source: Derived (Type is String)
  • start_gpsweek[ 0..0] (Type is Int32)
    • attributes
      • units: weeks from 1980-01-06 (Type is String)
      • contentType: auxiliaryInformation (Type is String)
      • long_name: Start GPSWeek of Granule (Actual) (Type is String)
      • description: GPS week number of the first data point in the granule. (Type is String)
      • source: Derived (Type is String)
  • atmosphere(Type is Group)
    • attributes
      • Description: Contains general ancillary parameters. (Type is String)
      • data_rate: Data within this group pertain to the granule in its entirety. (Type is String)
    • cal_atm_trans[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Atm Trans (Type is String)
        • description: Particulate transmission from top of atmosphere to the calibration height (13 km) (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • back_f2[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Background Fact method2 (Type is String)
        • description: Scaling factor in Method 2 background computation (Type is String)
        • source: Atmosphere ATBD section 3.3.4 (Type is String)
    • cal_cloud_thres[ 0..0] (Type is Float32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Cloud Threshold (Type is String)
        • description: Threshold for excluding NRB data in calibration zone. (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • va_top_ht[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Top height of vertically aligned profile (Type is String)
        • description: Top height of vertically aligned profile (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • alpha[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Scaling factor (a) (Type is String)
        • description: Scaling factor (a) for computation of the magnitude of molecular folding. (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • cal_integ_time[ 0..0] (Type is Float32)
      • attributes
        • units: seconds (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Integ Time (Type is String)
        • description: Calibration integration time (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • ozone_const[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Ozone column density constant (Type is String)
        • description: Ozone column density constant (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • bin_span[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of bins to search for max (Type is String)
        • description: Number of bins to search for max (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • num_va_bins[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of vertically aligned bins (Type is String)
        • description: Number of vertically aligned bins (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atlas_atm_shot_sum_50hz[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of shots at 50hz (Type is String)
        • description: Number of shots summed to compute an ATM histogram at 50 hz (diagnostic) (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atlas_n_atm_hist_bins[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of histogram bins (Type is String)
        • description: Number of ATM histogram bins (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • gas_const_r[ 0..0] (Type is Float64)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Ideal gas constant R (Type is String)
        • description: Ideal gas constant (R) (Type is String)
        • source: Globals (Type is String)
    • deg2rad[ 0..0] (Type is Float64)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Degree to radians conversion (Type is String)
        • description: Degrees to radians conversion factor (Type is String)
        • source: Globals (Type is String)
    • atlas_atm_hist_binsize[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: Nominal size of each ATM histogram bin, in meters (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • long_name: Histogram bin size (m) (Type is String)
    • backg_n_seg[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of background segments in method 1 (Type is String)
        • description: Number of background segments in method 1 (Type is String)
        • source: Atmosphere ATBD section 3.3.4 (Type is String)
    • king_fact[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: KING factor (Type is String)
        • description: King factor for molecular transmission. (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atlas_atm_hist_binsize_s[ 0..0] (Type is Float64)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: Nominal size of each ATM histogram bin, in seconds (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • long_name: Histogram bin size (s) (Type is String)
    • cal_top_h[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Top height of Cal zone (Type is String)
        • description: Top height of the calibration zone (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • cal_default[ 0..0] (Type is Float32)
      • attributes
        • units: Photons*m^3 *sr / J (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Default CAL Constant (Type is String)
        • description: Default atmosphere calibration constant. Used by default when no calibration data have been computed for an ATL04 granule. (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • back_f1[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Background Fact method1 (Type is String)
        • description: Scaling factor in Method 1 background computation (Type is String)
        • source: Atmosphere ATBD section 3.3.4 (Type is String)
    • grd_thres[ 0..0] (Type is Float32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Ground Threshold (Type is String)
        • description: Threshold for Ground detection (photons/bin) (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • atm_tep_width[ 0..0] (Type is Float64)
      • attributes
        • units: sq meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: TEP Window Width (Type is String)
        • description: The width of the TEP removal window. (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • dtime_select[ 0..0] (Type is Int32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: Deadtime factor used. (Type is String)
        • source: Control (Type is String)
        • flag_meanings: dtime_fact1 dtime_fact2 (Type is String)
        • flag_values: 1, 2 (Type is Int32)
        • valid_min: 1 (Type is Int32)
        • valid_max: 2 (Type is Int32)
        • long_name: dead time factor used (Type is String)
    • boltzmann_const[ 0..0] (Type is Float32)
      • attributes
        • units: erg/K (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Boltzmann Constant (Type is String)
        • description: Boltzmann constant (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • atm_laser_wavelength_nm[ 0..0] (Type is Float32)
      • attributes
        • units: nm (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Laser Wavelength (nm) (Type is String)
        • description: ATLAS Laser wavelength, in nanometers (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • ht_min[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Minimum height to use in ATM profile (Type is String)
        • description: Minimum height to use in ATM profile (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atlas_n_pce[ 0..0] (Type is Int32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of ATLAS PCEs (Type is String)
        • description: Number of ATLAS PCE boards (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • num_molec_bins[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Number of bins in molecular profile (Type is String)
        • description: Number of bins in molecular profile (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • molec_top_ht[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Top height of molecular profile (Type is String)
        • description: Top height of molecular profile. (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • aer_scat_rat[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Aerosol Scattering Ratio (Type is String)
        • description: Aerosol Scattering Ratio in the calibration zone (11 (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atm_processing_interval[ 0..0] (Type is Float64)
      • attributes
        • units: seconds (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Seconds of ATM data processed in one chunk. (Type is String)
        • description: The number of seconds of ATM data processed in one chunk. (Type is String)
        • source: Control (Type is String)
    • atm_tep_start[ 0..0] (Type is Float64)
      • attributes
        • units: ns (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: TEP Window Start (Type is String)
        • description: The start time of the TEP removal window. (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • receiver_optical_throughput[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: Nominal Receiver Optics Throughput (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • long_name: Receiver Optics Throughput (Type is String)
    • atlas_atm_shot_sum_25hz[ 0..0] (Type is Int32)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: Number of shots summed to compute an ATM histogram at 25 hz (nominal) (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • long_name: Number of shots at 25hz (Type is String)
    • telescope_area[ 0..0] (Type is Float64)
      • attributes
        • units: sq meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Telescope Effective Area (Type is String)
        • description: Effective collection area of telescope (At) (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • chappius_coef[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Chappius Coefficient (Type is String)
        • description: Chappius ozone absorption coefficient (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • grd_thres_atl03[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Ground Threshold using ATL03 signal (Type is String)
        • description: Threshold for Ground detection (photons/bin) when using ATL03-classified signal (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • cal_scat_ratio[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Scat Ratio (Type is String)
        • description: Calibration Zone (13 to 11 km) aerosol scattering ratio (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • planck_const[ 0..0] (Type is Float64)
      • attributes
        • units: Js (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Planck constant (h) (Type is String)
        • description: Planck constant (h) (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • detector_efficiency[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Detector Quantum Efficiency (Type is String)
        • description: Detector quantum efficiency (Qe) (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • atm_pulse_ns[ 0..0] (Type is Float64)
      • attributes
        • units: sq meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Pulse Time (Type is String)
        • description: The time between ATLAS pulses. (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • speed_of_light[ 0..0] (Type is Float64)
      • attributes
        • units: meters/second (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Speed of light (c) (Type is String)
        • description: Speed of light (c) (Type is String)
        • source: Globals (Type is String)
    • backg_select[ 0..0] (Type is Int32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: background method used (Type is String)
        • description: The background method used in calculation of NRB (Type is String)
        • source: Atmosphere ATBD section 3.3.4 (Type is String)
    • dead_time_sfac[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Dead Time Signal Factor (Type is String)
        • description: Dead time signal factor (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • seg_pct_thres[ 0..0] (Type is Float32)
      • attributes
        • units: 1 (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Segment percent threshold (Type is String)
        • description: Segment percent threshold (Type is String)
        • source: Atmosphere ATBD (Type is String)
    • cal_lat_bound[ 0..0] (Type is Float64)
      • attributes
        • units: degrees (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Latitude Bound (Type is String)
        • description: The latitude boundary for calibration calculation (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • cal_bot_h[ 0..0] (Type is Float32)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Bottom height of Cal zone (Type is String)
        • description: Bottom height of the calibration zone (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
    • pi[ 0..0] (Type is Float64)
      • attributes
        • units: counts (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: PI (Type is String)
        • description: PI (Type is String)
        • source: Globals (Type is String)
    • atm_laser_wavelength_m[ 0..0] (Type is Float64)
      • attributes
        • units: meters (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • description: ATLAS Laser wavelength, in meters (Type is String)
        • source: Atmosphere ATBD (Type is String)
        • long_name: Laser Wavelength (m) (Type is String)
    • cal_solar_angle_limit[ 0..0] (Type is Float32)
      • attributes
        • units: degrees (Type is String)
        • contentType: auxiliaryInformation (Type is String)
        • long_name: Cal Solar Angle Limit (Type is String)
        • description: Minimum solar zenith angle for calibration calculation (Type is String)
        • source: Atmosphere ATBD section 2 (Type is String)
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