Attributes { HDF5_GLOBAL { String granule_type "ATL13"; String short_name "ATL13"; String level "3A"; String description "Along-track inland water height extracted from Land/Water/ Vegetation product. Where data permits, includes roughness, slope and aspect."; 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)"; String contributor_role "Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer"; String Conventions "CF-1.6"; String date_type "UTC"; String featureType "trajectory"; String geospatial_lat_units "degrees_north"; String geospatial_lon_units "degrees_east"; String identifier_product_doi "10.5067/ATLAS/ATL13.001"; String identifier_product_doi_authority "http://dx.doi.org"; String identifier_product_type "ATL13"; 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."; String naming_authority "http://dx.doi.org"; String spatial_coverage_type "Horizontal"; String standard_name_vocabulary "CF-1.6"; String time_type "CCSDS UTC-A"; String date_created "2019-06-30T15:56:18.000000Z"; String hdfversion "HDF5 1.10.3"; String history "2019-06-30T15:56:18.000000Z;2b257122-6d49-3c5b-bc45-6653fa1c58fb;Created by PGE atlas_l3a_iw Version3.1"; String identifier_file_uuid "2b257122-6d49-3c5b-bc45-6653fa1c58fb"; String identifier_product_format_version "3.1"; Float64 time_coverage_duration 22630.000000000000; String time_coverage_end "2019-03-31T03:39:51.000000Z"; String time_coverage_start "2019-03-30T21:22:41.000000Z"; Float64 geospatial_lat_min -90.000000000000000; Float64 geospatial_lon_min -180.00000000000000; Float64 geospatial_lat_max 90.000000000000000; Float64 geospatial_lon_max 180.00000000000000; String publisher_name "NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center"; String publisher_email "nsidc@nsidc.org"; String publisher_url "http://nsidc.org/daac/"; String title "ATLAS/ICESat-2 L3A Inland Water Surface Height"; String identifier_file_product_type "ATL13"; String institution "National Aeronautics and Space Administration (NASA)"; String creator_name "GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System"; String summary "The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics."; String keywords "EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > NONE > NONE > NONE > NONE"; String keywords_vocabulary "NASA/GCMD Science Keywords"; 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."; String processing_level "3A"; String references "http://nsidc.org/data/icesat2/data.html"; String project "ICESat-2 > Ice, Cloud, and land Elevation Satellite-2"; String instrument "ATLAS > Advanced Topographic Laser Altimeter System"; String platform "ICESat-2 > Ice, Cloud, and land Elevation Satellite-2"; String source "Spacecraft"; } orbit_info { String Description "Contains orbit information."; String data_rate "Varies. Data are only provided when one of the stored values (besides time) changes."; String fullnamepath "/orbit_info"; } METADATA { String Description "ISO19115 Structured Metadata Represented within HDF5"; String iso_19139_dataset_xml " ATL13_20190330212241_00250301_001_01.h5 NSIDC DAAC > National Snow and Ice Data Center DAAC nsidc@nsidc.org http://nsidc.org/daac/ pointOfContact 2019-06-30T15:56:18.000000Z ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data ISO 19115-2:2009-02-15 ATL13_20190330212241_00250301_001_01.h5 2019-06-30T15:56:18.000000Z creation ATL13 The ECS Short Name 001 The ECS Version ID ATL13_20190330212241_00250301_001_01.h5 ProducerGranuleId The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams. onGoing ATL13 001 largerWorkCitation eng geoscientificInformation AscendingCrossing: 153.00800985196710 StartLatitude: 0.0000000000000000 StartDirection:A EndLatitude: 0.0000000000000000 EndDirection: A gov.nasa.esdis.umm.orbitparameters OrbitParameters OrbitNumber: 3000 EquatorCrossingLongitude: 153.00800985196710 EquatorCrossingDateTime: 2019-03-30T21:22:41.968204Z gov.nasa.esdis.umm.orbitcalculatedspatialdomains OrbitCalculatedSpatialDomains OrbitNumber: 3001 EquatorCrossingLongitude: 129.38938089818646 EquatorCrossingDateTime: 2019-03-30T22:56:59.313118Z gov.nasa.esdis.umm.orbitcalculatedspatialdomains OrbitCalculatedSpatialDomains OrbitNumber: 3002 EquatorCrossingLongitude: 105.76958231202948 EquatorCrossingDateTime: 2019-03-31T00:31:16.716515Z gov.nasa.esdis.umm.orbitcalculatedspatialdomains OrbitCalculatedSpatialDomains OrbitNumber: 3003 EquatorCrossingLongitude: 82.148677287185407 EquatorCrossingDateTime: 2019-03-31T02:05:34.187860Z gov.nasa.esdis.umm.orbitcalculatedspatialdomains OrbitCalculatedSpatialDomains 2019-03-30T21:22:41.000000Z 2019-03-31T03:39:51.000000Z dataset 2019-06-30T15:56:18.000000Z;2b257122-6d49-3c5b-bc45-6653fa1c58fb;Created by PGE atlas_l3a_iw Version3.1 2019-06-30T15:56:18.000000Z "; String iso_19139_series_xml " ATL13.001 eng utf8 series NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center 303-492-6199 303-492-2468 1540 30th St Campus Box 449 Boulder Colorado 80309-0449 USA nsidc@nsidc.org http://nsidc.org/daac/ 9:00 A.M. to 5:00 P.M., U.S. Mountain Time, Monday through Friday, excluding U.S. holidays. Contact by e-mail first pointOfContact 2015-10-15 ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data ISO 19115-2:2009(E) ATLAS/ICESat-2 L3A Inland Water Surface Height 2016-06-09 revision 001 ATL13 The ECS Short Name 001 The ECS Version ID doi:10.5067/ATLAS/ATL13.001 gov.nasa.esdis A Digital Object Identifier (DOI) National Aeronautics and Space Administration (NASA) resourceProvider GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System originator Initial version of the processing software The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams. The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics. The software that generates the ATL13 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. onGoing NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center distributor HDF 5 EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > NONE > NONE > NONE > NONE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > DRAINAGE BASINS > NONE > NONE > NONE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > LAKES/RESERVOIRS > NONE > NONE > NONE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > RIVERS/STREAMS > NONE > NONE > NONE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > WATER CHANNELS > NONE > NONE > NONE EARTH SCIENCE > TERRESTRIAL HYDROSPHERE > SURFACE WATER FEATURES > WETLANDS > NONE > NONE > NONE theme NASA/GCMD Science Keywords NASA Global Change Master Directory (GCMD) User Support Office NASA Global Change Master Directory, Goddard Space Flight Center Greenbelt MD 20771 USA gcmduso@gcmd.gsfc.nasa.gov http://gcmd.nasa.gov/ http web browser NASA Global Change Master Directory (GCMD) Home Page information http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso custodian Global Change Master Directory (GCMD) NASA Global Change Master Directory, Goddard Space Flight Center Greenbelt MD 20771 USA gcmduso@gcmd.gsfc.nasa.gov http://gcmd.nasa.gov/Resources/valids/ http web browser NASA Global Change Master Directory (GCMD) Keyword Page This page describes the NASA GCMD Keywords, how to reference those keywords and provides download instructions. download http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso custodian GEOGRAPHIC REGION > GLOBAL place NASA/GCMD Location Keywords NASA/NSIDC_DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center dataCenter NASA/GCMD Data Center Keywords Earth Observation Satellites > NASA Decadal Survey > ICESAT-2 > Ice, Cloud, and land Elevation Satellite-2 platform NASA/GCMD Platform Keywords Earth Remote Sensing Instruments > Active Remote Sensing > Altimeters > Lidar/Laser Altimeters > ATLAS > Advanced Topographic Laser Altimeter System instrument NASA/GCMD Instrument Keywords 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. eng geoscientificInformation SpatialCoverageType=HORIZONTAL, SpatialGranuleSpatialRepresentation=ORBIT, TemporalRangeType=Continuous Range, TimeType=UTC -180.0 180.0 -90.0 90.0 SwathWidth: 36.0 Period: 96.8 InclinationAngle: 92.0 NumberOfOrbits: 4.0 StartCircularLatitude: 0.0 gov.nasa.esdis.umm.orbitparameters OrbitParameters 2005-01-01T00:00:00Z 2020-12-31T23:59:59Z 3A 3A HDF 5 NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center distributor http://nsidc.org/data/icesat2/data.html http Data Product Description Page information http://nsidc.org/data/icesat2/order.html http Data Product Order Page order http://dx.doi.org/10.5067/ATLAS/ATL13.001 http Digital Object Identifier URL information ATLAS > Advanced Topographic Laser Altimeter System ATLAS Advanced Topographic Laser Altimeter System Laser Altimeter 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. ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 ICESat-2 Ice, Cloud, and land Elevation Satellite-2 underDevelopment ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 ICESat-2 Ice, Cloud, and land Elevation Satellite-2 Spacecraft "; String fullnamepath "/METADATA"; } METADATA_AcquisitionInformation { } METADATA_AcquisitionInformation_lidar { String pulse_rate "10000 pps"; String wavelength "532 nm"; String identifier "ATLAS"; String type "Laser Altimeter"; 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."; String fullnamepath "/METADATA/AcquisitionInformation/lidar"; } METADATA_AcquisitionInformation_lidarDocument { String edition "Pre-Release"; String publicationDate "12/31/17"; String title "A document describing the ATLAS instrument will be provided by the ICESat-2 Project Science Office."; String fullnamepath "/METADATA/AcquisitionInformation/lidarDocument"; } METADATA_AcquisitionInformation_platform { String identifier "ICESat-2"; String description "Ice, Cloud, and land Elevation Satellite-2"; String type "Spacecraft"; String fullnamepath "/METADATA/AcquisitionInformation/platform"; } METADATA_AcquisitionInformation_platformDocument { String edition "31-Dec-16"; String publicationDate "31-Dec-16"; 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"; String fullnamepath "/METADATA/AcquisitionInformation/platformDocument"; } METADATA_DataQuality { String scope "NOT_SET"; String fullnamepath "/METADATA/DataQuality"; } METADATA_DataQuality_CompletenessOmission { String evaluationMethodType "directInternal"; String measureDescription "TBD"; String nameOfMeasure "TBD"; String unitofMeasure "TBD"; String value "NOT_SET"; String fullnamepath "/METADATA/DataQuality/CompletenessOmission"; } METADATA_DataQuality_DomainConsistency { String evaluationMethodType "directInternal"; String measureDesciption "TBD"; String nameOfMeasure "TBD"; String unitofMeasure "TBD"; String value "NOT_SET"; String fullnamepath "/METADATA/DataQuality/DomainConsistency"; } METADATA_ProductSpecificationDocument { String characterSet "utf8"; String edition "Revision -"; String language "eng"; String publicationDate "12/1/2017"; String ShortName "ATL13_SDP"; String title "ICESat-2-SIPS-SPEC-4267 - ATLAS Science Algorithm Standard Data Product (SDP) Volume T12 (ATL13). Revision -."; String fullnamepath "/METADATA/ProductSpecificationDocument"; } METADATA_SeriesIdentification { String maintenanceAndUpdateFrequency "asNeeded"; String maintenanceDate "SET_BY_META"; String VersionID "001"; String identifier_product_DOI "10.5067/ATLAS/ATL13.001"; String language "eng"; String characterSet "utf8"; String pointOfContact "NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center"; String longName "ATLAS/ICESat-2 L3A Inland Water Surface Height"; String shortName "ATL13"; String revisionDate "2016-06-09"; String resourceProviderOrganizationName "National Aeronautics and Space Administration (NASA)"; String abstract "The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams."; String purpose "The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics."; String credit "The software that generates the ATL13 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland."; String status "onGoing"; String format "HDF"; String formatVersion "5"; String topicCategory "geoscientificInformation"; String mission "ICESat-2 > Ice, Cloud, and land Elevation Satellite-2"; String fullnamepath "/METADATA/SeriesIdentification"; } METADATA_DatasetIdentification { String spatialRepresentationType "along-track"; String creationDate "2019-06-30T15:56:18.000000Z"; String uuid "2b257122-6d49-3c5b-bc45-6653fa1c58fb"; String fileName "ATL13_20190330212241_00250301_001_01.h5"; String VersionID "001"; String language "eng"; String characterSet "utf8"; String shortName "ATL13"; String originatorOrganizationName "GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System"; String abstract "The ICESat-2 ATL13 standard data product contains along track surface height of inland water bodies. This product contains, for each beam, water surface height, slope, and rms aggregated into segments defined by approximately 100 signal photons. Also includes water surface slope and aspect between neighboring strong beams."; String purpose "The purpose of ATL13 is to provide along-track inland water surface heights and associated statistics."; String credit "The software that generates the ATL13 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland."; String status "onGoing"; String topicCategory "geoscientificInformation"; String fullnamepath "/METADATA/DatasetIdentification"; } METADATA_Extent { Float64 northBoundLatitude 90.000000000000000; Float64 eastBoundLongitude 180.00000000000000; Float64 southBoundLatitude -90.000000000000000; Float64 westBoundLongitude -180.00000000000000; String rangeBeginningDateTime "2019-03-30T21:22:41.000000Z"; String rangeEndingDateTime "2019-03-31T03:39:51.000000Z"; String fullnamepath "/METADATA/Extent"; } METADATA_QADatasetIdentification { String abstract "An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule"; String creationDate "2019-06-30T19:04:12.000000Z"; String fileName "ATL13_20190330212241_00250301_001_01.qa"; String fullnamepath "/METADATA/QADatasetIdentification"; } METADATA_Lineage { } METADATA_Lineage_Control { String 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."; String fileName "CTL_atlas_l3a_iw_001653013.ctl"; String shortName "CNTL"; String version "1"; String fullnamepath "/METADATA/Lineage/Control"; } METADATA_Lineage_ANC38_13 { String description "ISO 19139 XML file containing DataSet-level metadata information."; String fileName "ATL13.001.dataset.xml"; String shortName "ANC38-13"; String uuid "8ebc4300-9093-313a-b1b4-c49694a31ebe"; String version "001"; String fullnamepath "/METADATA/Lineage/ANC38-13"; } METADATA_Lineage_ANC36_13 { String description "ISO 19139 XML file containing Series-level metadata information."; String fileName "ATL13.001.series.xml"; String shortName "ANC36-13"; String uuid "70478bf2-ac6b-3fa5-8551-7cb06139928a"; String version "001"; String fullnamepath "/METADATA/Lineage/ANC36-13"; } METADATA_Lineage_ANC26_13 { String description "HDF5 template file that defines the organization and default content of the product metadata."; String fileName "atl13_metadata_template.h5"; String shortName "ANC26-13"; String uuid "07e501f7-0672-3882-a153-59eebf1f4300"; String version "031"; String fullnamepath "/METADATA/Lineage/ANC26-13"; } METADATA_Lineage_ATL03 { String description "ICESat-2 ATLAS L2A Global Geolocated Photon data products."; String fileName "ATL03_20190330212241_00250301_001_02.h5\000", "ATL03_20190330212943_00250302_001_02.h5\000", "ATL03_20190330213813_00250303_001_02.h5\000", "ATL03_20190330214338_00250304_001_02.h5\000", "ATL03_20190330214848_00250305_001_02.h5\000", "ATL03_20190330220243_00250307_001_02.h5\000", "ATL03_20190330220945_00250308_001_02.h5\000", "ATL03_20190330221647_00250309_001_02.h5\000", "ATL03_20190330222249_00250310_001_02.h5\000", "ATL03_20190330223030_00250311_001_02.h5\000", "ATL03_20190330223613_00250312_001_02.h5\000", "ATL03_20190330224354_00250313_001_02.h5\000", "ATL03_20190330224956_00250314_001_02.h5\000", "ATL03_20190330225659_00260301_001_02.h5\000", "ATL03_20190330230400_00260302_001_02.h5\000", "ATL03_20190330231231_00260303_001_02.h5\000", "ATL03_20190330231756_00260304_001_02.h5\000", "ATL03_20190330232305_00260305_001_02.h5\000", "ATL03_20190330233700_00260307_001_02.h5\000", "ATL03_20190330234402_00260308_001_02.h5\000", "ATL03_20190330235105_00260309_001_02.h5\000", "ATL03_20190330235707_00260310_001_02.h5\000", "ATL03_20190331000448_00260311_001_02.h5\000", "ATL03_20190331001031_00260312_001_02.h5\000", "ATL03_20190331001812_00260313_001_02.h5\000", "ATL03_20190331002414_00260314_001_02.h5\000", "ATL03_20190331003116_00270301_001_02.h5\000", "ATL03_20190331003818_00270302_001_02.h5\000", "ATL03_20190331004648_00270303_001_02.h5\000", "ATL03_20190331005213_00270304_001_02.h5\000", "ATL03_20190331005723_00270305_001_02.h5\000", "ATL03_20190331010248_00270306_001_02.h5\000", "ATL03_20190331011118_00270307_001_02.h5\000", "ATL03_20190331011820_00270308_001_02.h5\000", "ATL03_20190331012522_00270309_001_02.h5\000", "ATL03_20190331013124_00270310_001_02.h5\000", "ATL03_20190331015229_00270313_001_02.h5\000", "ATL03_20190331015831_00270314_001_02.h5\000", "ATL03_20190331020534_00280301_001_02.h5\000", "ATL03_20190331021236_00280302_001_02.h5\000", "ATL03_20190331022106_00280303_001_02.h5\000", "ATL03_20190331022631_00280304_001_02.h5\000", "ATL03_20190331023140_00280305_001_02.h5\000", "ATL03_20190331023705_00280306_001_02.h5\000", "ATL03_20190331024535_00280307_001_02.h5\000", "ATL03_20190331025237_00280308_001_02.h5\000", "ATL03_20190331025940_00280309_001_02.h5\000", "ATL03_20190331030542_00280310_001_02.h5\000", "ATL03_20190331031323_00280311_001_02.h5\000", "ATL03_20190331031906_00280312_001_02.h5\000", "ATL03_20190331032647_00280313_001_02.h5\000", "ATL03_20190331033249_00280314_001_02.h5\000"; String shortName "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000", "ATL03\000"; String uuid "102309e8-db23-356e-840a-d833d86ca353\000", "50b783cc-0203-3efd-bb14-50422e1c9343\000", "d14183af-beb4-3d05-ba96-83785865d075\000", "7cc797e1-3a81-32eb-a6f3-df03347fb42b\000", "752906dd-f7e0-3b68-a271-316e022e9888\000", "69f309de-7739-3ea9-b47e-cb8f19e4b849\000", "61cc5506-5a08-3c3d-ae14-96a6c0e60620\000", "e4dd6564-7d16-3451-9121-ed255475c2bc\000", "7dafcaec-1199-374d-b5b1-07c4b21ad140\000", "6c2db160-3d7b-3635-a129-e2b405704f89\000", "629e8727-d32b-3c64-b880-62947909908c\000", "c10afb1b-84d4-335e-a2cc-60e352a3af34\000", "1a1ddcf5-2da9-326b-a732-99aa5063a0bc\000", "2f23af8e-04a8-3a09-bd6e-9007706c49c8\000", "87aec70f-817e-345d-a850-8fe8530e82f2\000", "7a499b3c-8abf-31eb-8e87-b7b8c19b4659\000", "868e3a26-a4ac-37f0-a99a-a7743dfb3584\000", "d2e56059-c623-3513-992c-f8294ce90353\000", "3b13bed6-953e-3638-bd1c-14c85c5e7310\000", "e6529db1-8d1c-3d0b-ae22-6d6ed7dd80b7\000", "f682995c-2666-3d6c-be23-3b6597785f34\000", "3ad1d934-00c2-324b-944e-6714d9523c4f\000", "106151d0-a669-36b6-b6ea-4b83817627b2\000", "3041bb83-025c-38c7-92db-5247ab917edd\000", "dca81d4b-950c-32ed-b36a-fd06a5e91e33\000", "66730429-ba53-39e1-ba17-9ae18b6692a3\000", "3a08b6ca-4198-3a4b-8b86-1bb9023f622f\000", "a78aaedd-4078-32b9-9276-db6b9d982ad4\000", "8e81e6c7-825f-3b67-916e-0174908f0de2\000", "12fc52d6-c73a-3a92-b7a8-94be53a21836\000", "5d04199c-25f7-33f5-8ec3-3153f5a823a6\000", "9682af56-358d-3713-beaf-a86b54016c4a\000", "5f0aa37e-99e6-3a5e-ba25-5132f8dc9157\000", "57ddfa5a-bbdc-3420-ae16-e4ec79f3d810\000", "cc212477-a0f2-34c0-94b2-be831f45e040\000", "abbce1b1-763c-33ad-9080-cfe69139ae10\000", "aaa216bd-08a1-34f5-8d7a-fa70031fcb9e\000", "383eeff4-5ede-3c50-bcaa-b8018900c652\000", "0c8f406b-b0e3-33d2-a092-1a9aad57fc16\000", "09640c6d-963d-3e96-936d-898106b8e834\000", "93f1a02e-c22b-3bf0-b1d4-c48599d35f70\000", "0534b0e4-9977-3648-a9cb-bac523c5cd68\000", "16ced545-f590-3fc2-be6f-c86088dabbeb\000", "0c6d571f-a242-32cb-a59e-376d98ce2584\000", "dbad6939-1ac8-34ff-ae12-80862b0952e9\000", "1558dec5-fd9a-312a-9f51-8fe02338139a\000", "34edd946-2b72-30e4-8e94-13515a0e3521\000", "8c665313-73b2-3b93-8caa-77b552c08305\000", "12d3aabd-53a6-319a-9462-5ce64d07ceb7\000", "ff3887e0-6119-3321-b641-5cc3f92001f1\000", "446bc286-ed1c-3069-9b9b-deef4ddeea89\000", "d8c412cb-df40-3977-8f73-8acac79fbae7\000"; String version "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000", "001\000"; Int32 start_cycle 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3; Int32 end_cycle 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3; Int32 start_orbit 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003; Int32 end_orbit 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3000, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3001, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3002, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003, 3003; Int32 start_rgt 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28; Int32 end_rgt 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28; Int32 start_region 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14; Int32 end_region 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14; Int32 start_geoseg 1, 149703, 330726, 446059, 555744, 852096, 1001797, 1151688, 1280087, 1443580, 1565330, 1728829, 1857236, 1, 149709, 330736, 446067, 555756, 852097, 1001793, 1151682, 1280081, 1443573, 1565328, 1728826, 1857233, 1, 149708, 330735, 446065, 555758, 671087, 852107, 1001807, 1151698, 1280097, 1728833, 1857235, 1, 149706, 330732, 446065, 555762, 671094, 852121, 1001826, 1151720, 1280119, 1443607, 1565358, 1728844, 1857240; Int32 end_geoseg 149702, 330725, 446058, 555743, 671075, 1001796, 1151687, 1280086, 1443579, 1565329, 1728828, 1857235, 2007137, 149708, 330735, 446066, 555755, 671082, 1001792, 1151681, 1280080, 1443572, 1565327, 1728825, 1857232, 2007134, 149707, 330734, 446064, 555757, 671086, 852106, 1001806, 1151697, 1280096, 1443585, 1857234, 2007130, 149705, 330731, 446064, 555761, 671093, 852120, 1001825, 1151719, 1280118, 1443606, 1565357, 1728843, 1857239, 2007130; String fullnamepath "/METADATA/Lineage/ATL03"; } METADATA_Lineage_ATL09 { String description "ICESat-2 ATLAS L3A atmosphere data products."; String end_geoseg "SET_BY_PGE"; String start_geoseg "SET_BY_PGE"; String fileName "ATL09_20190330212241_00250301_001_01.h5\000", "ATL09_20190330225659_00260301_001_01.h5\000", "ATL09_20190331003116_00270301_001_01.h5\000", "ATL09_20190331020534_00280301_001_01.h5\000"; String shortName "ATL09\000", "ATL09\000", "ATL09\000", "ATL09\000"; String uuid "f7068fe7-d4fd-3b30-b02f-db225c04b6c1\000", "ac13e9ea-c9a4-3668-8834-6827bb034cd7\000", "0ee02205-16f3-34cd-a657-0a6421170dc5\000", "b70d63cc-b405-3fb7-bec6-babe7e2f8698\000"; String version "001\000", "001\000", "001\000", "001\000"; Int32 start_cycle 3, 3, 3, 3; Int32 end_cycle 3, 3, 3, 3; Int32 start_orbit 3000, 3001, 3002, 3003; Int32 end_orbit 3000, 3001, 3002, 3003; Int32 start_rgt 25, 26, 27, 28; Int32 end_rgt 25, 26, 27, 28; Int32 start_region 1, 1, 1, 1; Int32 end_region 14, 14, 14, 14; String fullnamepath "/METADATA/Lineage/ATL09"; } METADATA_Lineage_ANC19 { String description "TAI to UTC leapsecond file retrieved from ftp://maia.usno.navy.mil/ser7/tai-utc.dat"; String fileName "tai_utc_2017.dat"; String shortName "ANC19"; String uuid "7c66d365-278a-31f7-8fe4-9c80e2f012e5"; String version "001"; String fullnamepath "/METADATA/Lineage/ANC19"; } METADATA_Lineage_ANC25_13 { String description "HDF5 template file that defines the organization and default content of the product."; String fileName "atl13_template.h5"; String shortName "ANC25-13"; String uuid "0b695dfb-33de-3c5a-9518-00737a7a168d"; String version "031"; String fullnamepath "/METADATA/Lineage/ANC25-13"; } METADATA_Lineage_ANC20_01 { String description "Water Basin shapefiles provided by the Inland Water ATBD lead."; String fileName "ATL13_Region_Mask_by_basins_20170201.dbf"; String shortName "ANC20-01"; String uuid "9d332759-a01c-3a75-a4ae-0b4306924e52"; String version "20170201"; String fullnamepath "/METADATA/Lineage/ANC20-01"; } METADATA_Lineage_ANC20_02 { String description "Water Body shapefiles provided by the Inland Water ATBD lead."; String fileName "ATL13_Inland_Water_Body_Mask_v2_20190410.dbf"; String shortName "ANC20-02"; String uuid "75f6ef27-bdb5-32cc-a14e-aa0c3ef0d1bf"; String version "20190410"; String fullnamepath "/METADATA/Lineage/ANC20-02"; } METADATA_ProcessStep { } METADATA_ProcessStep_Browse { String 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."; String identifier "atlas_brw"; String softwareVersion "Version 2.1.1"; String softwareDate "Apr 23 2019"; String softwareTitle "Creates ATLAS HDF5 browse files"; String runTimeParameters "CTL_atlas_l3a_iw_001653013.ctl"; String stepDateTime "2019-06-30T19:04:14.000000Z"; String fullnamepath "/METADATA/ProcessStep/Browse"; } METADATA_ProcessStep_Metadata { String 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."; String identifier "atlas_meta"; String softwareVersion "Version 4.1.1"; String softwareDate "Apr 23 2019"; String softwareTitle "Creates ATLAS XML metadata files"; String runTimeParameters "CTL_atlas_l3a_iw_001653013.ctl"; String stepDateTime "2019-06-30T19:07:18.000000Z"; String fullnamepath "/METADATA/ProcessStep/Metadata"; } METADATA_ProcessStep_PGE { String ATBDDate "9/12/2017"; String ATBDTitle "ICESat-2-SIPS-SPEC-TBD - SIPs: Inland Water Products L5 Specification Document"; String ATBDVersion "September 12, 2017"; String documentation "ICESat-2-SIPS-SPEC-5222 - ATLAS Science Algorithm Software Design Description (SDD) Volume 7 (atlas_l3a_iw). Revision -."; String documentDate "12/1/2017"; String processDescription "Computes along-track inland water surface height, slope, and roughness for each ATLAS beam, and also aspect and maximum slope (or gradient) of the planar surface between adjacent strong beams."; String identifier "atlas_l3a_iw"; String softwareVersion "Version3.1"; String softwareDate "Apr 23 2019"; String softwareTitle "ASAS L3A Inland Water PGE"; String runTimeParameters "CTL_atlas_l3a_iw_001653013.ctl"; String stepDateTime "2019-06-30T15:56:18.000000Z"; String fullnamepath "/METADATA/ProcessStep/PGE"; } METADATA_ProcessStep_QA { String 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"; String identifier "atl13_qa_util"; String softwareVersion "Version 3.1"; String softwareDate "Apr 23 2019"; String softwareTitle "ATL13 QA Utility"; String runTimeParameters "CTL_atlas_l3a_iw_001653013.ctl"; String stepDateTime "2019-06-30T19:04:12.000000Z"; String fullnamepath "/METADATA/ProcessStep/QA"; } gt1r { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce1"; String atlas_beam_type "weak"; String groundtrack_id "gt1r"; String atmosphere_profile "profile_1"; String atlas_spot_number "2"; String sc_orientation "Backward"; String fullnamepath "/gt1r"; } gt2r { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce2"; String atlas_beam_type "weak"; String groundtrack_id "gt2r"; String atmosphere_profile "profile_2"; String atlas_spot_number "4"; String sc_orientation "Backward"; String fullnamepath "/gt2r"; } gt1l { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce1"; String atlas_beam_type "strong"; String groundtrack_id "gt1l"; String atmosphere_profile "profile_1"; String atlas_spot_number "1"; String sc_orientation "Backward"; String fullnamepath "/gt1l"; } quality_assessment { String Description "Contains quality assessment data. This may include QA counters, QA along-track data and/or QA summary data."; String fullnamepath "/quality_assessment"; } gt3l { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce3"; String atlas_beam_type "strong"; String groundtrack_id "gt3l"; String atmosphere_profile "profile_3"; String atlas_spot_number "5"; String sc_orientation "Backward"; String fullnamepath "/gt3l"; } gt2l { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce2"; String atlas_beam_type "strong"; String groundtrack_id "gt2l"; String atmosphere_profile "profile_2"; String atlas_spot_number "3"; String sc_orientation "Backward"; String fullnamepath "/gt2l"; } ancillary_data { String Description "Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants."; String data_rate "Data within this group pertain to the granule in its entirety."; String fullnamepath "/ancillary_data"; } ancillary_data_inland_water { String Description "Contains general ancillary parameters."; String fullnamepath "/ancillary_data/inland_water"; } gt3r { String Description "Contains per-beam data products."; String data_rate "Data within this group are stored at the inland water short segment rate (/ancillary_data/inland_water/s_seg2)."; String atlas_pce "pce3"; String atlas_beam_type "weak"; String groundtrack_id "gt3r"; String atmosphere_profile "profile_3"; String atlas_spot_number "6"; String sc_orientation "Backward"; String fullnamepath "/gt3r"; } orbit_info_cycle_number { String units "1"; String contentType "referenceInformation"; String long_name "Cycle Number"; String description "A count of the number of exact repeats of this reference orbit."; String source "Operations"; Int16 valid_min 0; Int16 valid_max 50; String origname "cycle_number"; String fullnamepath "/orbit_info/cycle_number"; String coordinates "orbit_info_crossing_time"; } orbit_info_orbit_number { String units "1"; String contentType "referenceInformation"; String long_name "Orbit Number"; String description "Unique identifying number for each planned ICESat-2 orbit."; String source "Operations"; UInt16 valid_min 1; UInt16 valid_max 65000; String origname "orbit_number"; String fullnamepath "/orbit_info/orbit_number"; String coordinates "orbit_info_crossing_time"; } orbit_info_lan { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Ascending Node Longitude"; String description "Longitude at the ascending node crossing."; String source "POD/PPD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "lan"; String fullnamepath "/orbit_info/lan"; String coordinates "orbit_info_crossing_time"; } orbit_info_sc_orient { String units "1"; String contentType "referenceInformation"; String long_name "Spacecraft Orientation"; String description "This parameter tracks the spacecraft orientation between forward, backward and transitional flight modes. ICESat-2 is considered to be flying forward when the weak beams are leading the strong beams; and backward when the strong beams are leading the weak beams. ICESat-2 is considered to be in transition while it is maneuvering between the two orientations. Science quality is potentially degraded while in transition mode."; String source "POD/PPD"; String flag_meanings "backward forward transition"; Int16 flag_values 0, 1, 2; Int16 valid_min 0; Int16 valid_max 2; String origname "sc_orient"; String fullnamepath "/orbit_info/sc_orient"; String coordinates "orbit_info_sc_orient_time"; } orbit_info_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "POD/PPD"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/orbit_info/rgt"; String coordinates "orbit_info_crossing_time"; } gt1r_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt1r/rgt"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt1r/qf_bias_fit"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt1r/sseg_mean_lon"; String coordinates "gt1r_delta_time"; } gt1r_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt1r/qf_ice"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt1r/inland_water_body_type"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt1r/inland_water_body_id"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt1r/segment_geoid"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt1r/inland_water_body_size"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt1r/err_slope_trk"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt1r/segment_slope_trk_bdy"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt1r/sseg_mean_lat"; String coordinates "gt1r_delta_time"; } gt1r_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt1r/qf_spec_width"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt1r/qf_bckgrd"; String coordinates "gt1r_delta_time gt1r_segment_lat gt1r_segment_lon"; } gt1r_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt1r/sseg_mean_time"; String coordinates "gt1r_delta_time"; } gt2r_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt2r/rgt"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt2r/qf_bias_fit"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt2r/sseg_mean_lon"; String coordinates "gt2r_delta_time"; } gt2r_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt2r/qf_ice"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt2r/inland_water_body_type"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt2r/inland_water_body_id"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt2r/segment_geoid"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt2r/inland_water_body_size"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt2r/err_slope_trk"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt2r/segment_slope_trk_bdy"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt2r/sseg_mean_lat"; String coordinates "gt2r_delta_time"; } gt2r_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt2r/qf_spec_width"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt2r/qf_bckgrd"; String coordinates "gt2r_delta_time gt2r_segment_lat gt2r_segment_lon"; } gt2r_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt2r/sseg_mean_time"; String coordinates "gt2r_delta_time"; } gt1l_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt1l/rgt"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt1l/qf_bias_fit"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt1l/sseg_mean_lon"; String coordinates "gt1l_delta_time"; } gt1l_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt1l/qf_ice"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt1l/inland_water_body_type"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt1l/inland_water_body_id"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt1l/segment_geoid"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt1l/inland_water_body_size"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt1l/err_slope_trk"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt1l/segment_slope_trk_bdy"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt1l/sseg_mean_lat"; String coordinates "gt1l_delta_time"; } gt1l_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt1l/qf_spec_width"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt1l/qf_bckgrd"; String coordinates "gt1l_delta_time gt1l_segment_lat gt1l_segment_lon"; } gt1l_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt1l/sseg_mean_time"; String coordinates "gt1l_delta_time"; } quality_assessment_qa_granule_fail_reason { String units "1"; String contentType "qualityInformation"; String long_name "Granule Failure Reason"; String description "Flag indicating granule failure reason. 0=no failure; 1=processing failure; 2=insufficient data; 3=TBD3; 4=TBD4; 5=TBD5"; String source "Operations"; String flag_meanings "no_failure processing_failure insufficient_data TBD3 TBD4 TBD5"; Int32 flag_values 0, 1, 2, 3, 4, 5; Int32 valid_min 0; Int32 valid_max 5; String origname "qa_granule_fail_reason"; String fullnamepath "/quality_assessment/qa_granule_fail_reason"; } quality_assessment_qa_granule_pass_fail { String units "1"; String contentType "qualityInformation"; String long_name "Granule Pass Flag"; String description "Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA."; String source "Operations"; String flag_meanings "PASS FAIL"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qa_granule_pass_fail"; String fullnamepath "/quality_assessment/qa_granule_pass_fail"; } gt3l_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt3l/rgt"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt3l/qf_bias_fit"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt3l/sseg_mean_lon"; String coordinates "gt3l_delta_time"; } gt3l_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt3l/qf_ice"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt3l/inland_water_body_type"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt3l/inland_water_body_id"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt3l/segment_geoid"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt3l/inland_water_body_size"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt3l/err_slope_trk"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt3l/segment_slope_trk_bdy"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt3l/sseg_mean_lat"; String coordinates "gt3l_delta_time"; } gt3l_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt3l/qf_spec_width"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt3l/qf_bckgrd"; String coordinates "gt3l_delta_time gt3l_segment_lat gt3l_segment_lon"; } gt3l_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt3l/sseg_mean_time"; String coordinates "gt3l_delta_time"; } gt2l_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt2l/rgt"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt2l/qf_bias_fit"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt2l/sseg_mean_lon"; String coordinates "gt2l_delta_time"; } gt2l_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt2l/qf_ice"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt2l/inland_water_body_type"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt2l/inland_water_body_id"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt2l/segment_geoid"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt2l/inland_water_body_size"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt2l/err_slope_trk"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt2l/segment_slope_trk_bdy"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt2l/sseg_mean_lat"; String coordinates "gt2l_delta_time"; } gt2l_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt2l/qf_spec_width"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt2l/qf_bckgrd"; String coordinates "gt2l_delta_time gt2l_segment_lat gt2l_segment_lon"; } gt2l_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt2l/sseg_mean_time"; String coordinates "gt2l_delta_time"; } ancillary_data_release { String units "1"; String contentType "auxiliaryInformation"; String long_name "Release Number"; 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."; String source "Operations"; String origname "release"; String fullnamepath "/ancillary_data/release"; } ancillary_data_end_geoseg { String units "1"; String contentType "auxiliaryInformation"; String long_name "Ending Geolocation Segment"; 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."; String source "Derived"; String origname "end_geoseg"; String fullnamepath "/ancillary_data/end_geoseg"; } ancillary_data_version { String units "1"; String contentType "auxiliaryInformation"; String long_name "Version"; 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."; String source "Operations"; String origname "version"; String fullnamepath "/ancillary_data/version"; } ancillary_data_end_region { String units "1"; String contentType "auxiliaryInformation"; String long_name "Ending Region"; 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."; String source "Derived"; String origname "end_region"; String fullnamepath "/ancillary_data/end_region"; } ancillary_data_atlas_sdp_gps_epoch { String units "seconds since 1980-01-06T00:00:00.000000Z"; String contentType "auxiliaryInformation"; String long_name "ATLAS Epoch Offset"; 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."; String source "Operations"; String origname "atlas_sdp_gps_epoch"; String fullnamepath "/ancillary_data/atlas_sdp_gps_epoch"; } ancillary_data_end_rgt { String units "1"; String contentType "auxiliaryInformation"; String long_name "Ending Reference Groundtrack"; 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."; String source "Derived"; Int32 valid_min 1; Int32 valid_max 1387; String origname "end_rgt"; String fullnamepath "/ancillary_data/end_rgt"; } ancillary_data_end_delta_time { String units "seconds since 2018-01-01"; String contentType "auxiliaryInformation"; String long_name "ATLAS End Time (Actual)"; String standard_name "time"; String description "Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed."; String source "Derived"; String origname "end_delta_time"; String fullnamepath "/ancillary_data/end_delta_time"; } ancillary_data_end_orbit { String units "1"; String contentType "auxiliaryInformation"; String long_name "Ending Orbit Number"; 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."; String source "Derived"; String origname "end_orbit"; String fullnamepath "/ancillary_data/end_orbit"; } ancillary_data_start_cycle { String units "1"; String contentType "auxiliaryInformation"; String long_name "Starting Cycle"; 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."; String source "Derived"; Int32 valid_min 0; Int32 valid_max 99; String origname "start_cycle"; String fullnamepath "/ancillary_data/start_cycle"; } ancillary_data_data_end_utc { String units "1"; String contentType "auxiliaryInformation"; String long_name "End UTC Time of Granule (CCSDS-A, Actual)"; String description "UTC (in CCSDS-A format) of the last data point within the granule."; String source "Derived"; String origname "data_end_utc"; String fullnamepath "/ancillary_data/data_end_utc"; } ancillary_data_control { String units "1"; String contentType "auxiliaryInformation"; String long_name "Control File"; String description "PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds."; String source "Operations"; String origname "control"; String fullnamepath "/ancillary_data/control"; } ancillary_data_start_gpssow { String units "seconds"; String contentType "auxiliaryInformation"; String long_name "Start GPS SOW of Granule (Actual)"; String description "GPS seconds-of-week of the first data point in the granule."; String source "Derived"; String origname "start_gpssow"; String fullnamepath "/ancillary_data/start_gpssow"; } ancillary_data_granule_end_utc { String units "1"; String contentType "auxiliaryInformation"; String long_name "End UTC Time of Granule (CCSDS-A, Requested)"; String description "Requested end time (in UTC CCSDS-A) of this granule."; String source "Derived"; String origname "granule_end_utc"; String fullnamepath "/ancillary_data/granule_end_utc"; } ancillary_data_end_cycle { String units "1"; String contentType "auxiliaryInformation"; String long_name "Ending Cycle"; 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."; String source "Derived"; Int32 valid_min 0; Int32 valid_max 99; String origname "end_cycle"; String fullnamepath "/ancillary_data/end_cycle"; } ancillary_data_granule_start_utc { String units "1"; String contentType "auxiliaryInformation"; String long_name "Start UTC Time of Granule (CCSDS-A, Requested)"; String description "Requested start time (in UTC CCSDS-A) of this granule."; String source "Derived"; String origname "granule_start_utc"; String fullnamepath "/ancillary_data/granule_start_utc"; } ancillary_data_start_delta_time { String units "seconds since 2018-01-01"; String contentType "auxiliaryInformation"; String long_name "ATLAS Start Time (Actual)"; String standard_name "time"; String description "Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed."; String source "Derived"; String origname "start_delta_time"; String fullnamepath "/ancillary_data/start_delta_time"; } ancillary_data_start_geoseg { String units "1"; String contentType "auxiliaryInformation"; String long_name "Starting Geolocation Segment"; 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."; String source "Derived"; String origname "start_geoseg"; String fullnamepath "/ancillary_data/start_geoseg"; } ancillary_data_inland_water_atm_window2 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "ATM Background Window Top"; String description "Upper limit of height above coarse water surface height for atmospheric background count calculation."; String source "ATBD Table 5-2"; String origname "atm_window2"; String fullnamepath "/ancillary_data/inland_water/atm_window2"; } ancillary_data_inland_water_b1_sseg1 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Small Segment Bin Size"; String description "Bin size to be used for histogramming of each small segment."; String source "ATBD Table 5-2"; String origname "b1_sseg1"; String fullnamepath "/ancillary_data/inland_water/b1_sseg1"; } ancillary_data_inland_water_s_seg1 { String units "1"; String contentType "auxiliaryInformation"; String long_name "Short Segment Length"; String description "Short segment size, operationally used as unit length over which to identify water surface height anomalies such as islands, bridges, etc."; String source "ATBD Table 5-2"; String origname "s_seg1"; String fullnamepath "/ancillary_data/inland_water/s_seg1"; } ancillary_data_inland_water_detrend_width { String units "1"; String contentType "auxiliaryInformation"; String long_name "Detrend Width"; String description "Number of standard deviations +/- mode to include in detrend band."; String source "ATBD Table 5-2"; String origname "detrend_width"; String fullnamepath "/ancillary_data/inland_water/detrend_width"; } ancillary_data_inland_water_sub_max { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Subsurf Max Vertical Profile"; String description "Maximum vertical profile of water subsurface to include in estimation of subsurface characteristics"; String source "ATBD Table 5-2"; String origname "sub_max"; String fullnamepath "/ancillary_data/inland_water/sub_max"; } ancillary_data_inland_water_ref_dist_iw_bdy { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Reference Difference"; String description "Maximum distance from a water body that a geosegment reference photon indicates the need for overlap testing each individual photon in the geosegment"; String source "ATBD Table 5-2"; String origname "ref_dist_iw_bdy"; String fullnamepath "/ancillary_data/inland_water/ref_dist_iw_bdy"; } ancillary_data_inland_water_sseg_mode_freq_test { String units "1"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mode Frequency Test"; String description "Threshold to test number of short segment histogram modes against for inclusion or exclusion of short segment."; String source "ATBD Table 5-2"; String origname "sseg_mode_freq_test"; String fullnamepath "/ancillary_data/inland_water/sseg_mode_freq_test"; } ancillary_data_inland_water_type_to_process { Int16 _FillValue 127; String units "1"; String long_name "Type to Process"; String description "Water body types that are to be processed by the ATL13 algorithm. This parameter is a rank 1 array of extent 9, with the body type digits coinciding with the array subscripts 1 through 9. Array elements are binary values, if 0 then process body type, 1 otherwise. Water body types are described in ATL13 chapter 4.7.1.2 and in Table 5-4."; String source "ATL13 ATBD, Section 4.7.1.2, Table 5-4"; String flag_meanings "process_type otherwise"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String contentType "auxiliaryInformation"; String origname "type_to_process"; String fullnamepath "/ancillary_data/inland_water/type_to_process"; } ancillary_data_inland_water_sig_threshold { String units "1"; String contentType "auxiliaryInformation"; String long_name "Signal Confidence Threshold"; String description "Minimum signal confidence required for photon to be included in analysis"; String source "ATBD Table 5-2"; String origname "sig_threshold"; String fullnamepath "/ancillary_data/inland_water/sig_threshold"; } ancillary_data_inland_water_size_to_process { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Size to Process"; String description "Water body sizes that are to be processed by the ATL13 algorithm for each water body type. This parameter is a rank 2 array of size 9x9, where array subscripts 1 through 9, coincide with body type digits along columns, and body size digits along rows. Array elements are binary values, if 0 then process body size for that type, 1 otherwise. Water body sizes are described in ATL13 chapter 4.7.1.2 and in Table 5-4."; String source "ATL13 ATBD, Section 4.7.1.2, Table 5-4"; String flag_meanings "process_size otherwise"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "size_to_process"; String fullnamepath "/ancillary_data/inland_water/size_to_process"; } ancillary_data_inland_water_gauss_pk_thres { String units "1"; String contentType "auxiliaryInformation"; String long_name "Gaussian Peak Threshold"; String description "Fraction of the peak amplitude above which Gaussian fit error analysis is executed (ie, calculate error on Gaussian only between the peak amplitude and gauss_pk_thres * peak)"; String source "ATBD Table 5-2"; String origname "gauss_pk_thres"; String fullnamepath "/ancillary_data/inland_water/gauss_pk_thres"; } ancillary_data_inland_water_sseg_mode_cnt_test { String units "1"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mode Count Test"; String description "Threshold to test number of values contained in short segment histogram multimodes against for inclusion or exclusion of short segment"; String source "ATBD Table 5-2"; String origname "sseg_mode_cnt_test"; String fullnamepath "/ancillary_data/inland_water/sseg_mode_cnt_test"; } ancillary_data_inland_water_shore_buffer { String units "1"; String contentType "auxiliaryInformation"; String long_name "Shore Buffer"; String description "Number of near-shore short segments to ignore in analysis due to near-shore influences."; String source "ATBD Table 5-2"; String origname "shore_buffer"; String fullnamepath "/ancillary_data/inland_water/shore_buffer"; } ancillary_data_inland_water_h_mavg_c { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Num Depth Bins C"; String description "Number of bins over which to calculate moving average"; String source "ATBD Table 5-2"; String origname "h_mavg_c"; String fullnamepath "/ancillary_data/inland_water/h_mavg_c"; } ancillary_data_inland_water_bckgrd_threshold { String units "counts/sec"; String contentType "auxiliaryInformation"; String long_name "Background Threshold"; String description "Thresholds outside of which computed background is flagged (High, Low)."; String source "ATBD Table 5-2"; String origname "bckgrd_threshold"; String fullnamepath "/ancillary_data/inland_water/bckgrd_threshold"; } ancillary_data_inland_water_f2_d_min { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Minimum Distance Thres"; String description "Minimum distance threshold between photons required for inclusion in algorithm."; String source "ATBD Table 5-2"; String origname "f2_d_min"; String fullnamepath "/ancillary_data/inland_water/f2_d_min"; } ancillary_data_inland_water_max_gseg_search { String units "1"; String contentType "auxiliaryInformation"; String long_name "Max Geoseg Search Radius"; String description "Maximum number of geosegments in either direction to search for reported water surface heights"; String source "ATBD Table 5-2"; String origname "max_gseg_search"; String fullnamepath "/ancillary_data/inland_water/max_gseg_search"; } ancillary_data_inland_water_sseg_length_test { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Short Segment Length Test"; String description "Threshold by which to test the length of a short segment to determine if it is anomalous or not anomalous."; String source "ATBD Table 5-2"; String origname "sseg_length_test"; String fullnamepath "/ancillary_data/inland_water/sseg_length_test"; } ancillary_data_inland_water_h_mavg_a { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Num Depth Bins A"; String description "Number of depth bins over which to compute H_mavg_a"; String source "ATBD Table 5-2"; String origname "h_mavg_a"; String fullnamepath "/ancillary_data/inland_water/h_mavg_a"; } ancillary_data_inland_water_signal_window_bottom { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Signal Window Bottom"; String description "Lower limit below coarse water surface to include photons for analysis."; String source "ATBD Table 5-2"; String origname "signal_window_bottom"; String fullnamepath "/ancillary_data/inland_water/signal_window_bottom"; } ancillary_data_inland_water_c_fresnel { String units "1"; String contentType "auxiliaryInformation"; String long_name "Fresnel Coeff"; String description "Fresnel specular reflection coefficient @ 532 nm"; String source "ATBD Table 5-2"; String origname "c_fresnel"; String fullnamepath "/ancillary_data/inland_water/c_fresnel"; } ancillary_data_inland_water_sseg_mode_spread_test { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mode Spread Test"; String description "Threshold to test distance between short segment histogram multimodes against for inclusion or exclusion of short segment."; String source "ATBD Table 5-2"; String origname "sseg_mode_spread_test"; String fullnamepath "/ancillary_data/inland_water/sseg_mode_spread_test"; } ancillary_data_inland_water_anmly_test { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Anomaly Test"; String description "Array containing threshold values against which to test segments for anomalous changes in height. The mode of each segment histogram will be tested against ht_water_coarse and excluded if the difference is greater than the value associated with the segment"; String source "ATBD Table 5-2"; String origname "anmly_test"; String fullnamepath "/ancillary_data/inland_water/anmly_test"; } ancillary_data_inland_water_c_adj { String units "1"; String contentType "auxiliaryInformation"; String description "Adjustment for the speed of light through water (cl)"; String source "ATBD Table 5-2"; String long_name "C Adjustment"; String origname "c_adj"; String fullnamepath "/ancillary_data/inland_water/c_adj"; } ancillary_data_inland_water_h_mavg_b { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Num Depth Bins B"; String description "Number of depth bins over which to compute H_mavg_b"; String source "ATBD Table 5-2"; String origname "h_mavg_b"; String fullnamepath "/ancillary_data/inland_water/h_mavg_b"; } ancillary_data_inland_water_b_long { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Long Bin Size"; String description "Bin size to be used by which to establish a histogram of long segments."; String source "ATBD Table 5-2"; String origname "b_long"; String fullnamepath "/ancillary_data/inland_water/b_long"; } ancillary_data_inland_water_bin_detrend { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Detrend Bin Size"; String description "Bin size used to establish a band of heights over which to determine the detrending equation."; String source "ATBD Table 5-2"; String origname "bin_detrend"; String fullnamepath "/ancillary_data/inland_water/bin_detrend"; } ancillary_data_inland_water_atm_window1 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "ATM Background Window Bottom"; String description "Lower limit of height above coarse water surface height for atmospheric background count calculation."; String source "ATBD Table 5-2"; String origname "atm_window1"; String fullnamepath "/ancillary_data/inland_water/atm_window1"; } ancillary_data_inland_water_m_avg_d { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Num Depth Bins D"; String description "Number of depth bins over which to compute P_ht_long_subsurf_mavg"; String source "ATBD Table 5-2"; String origname "m_avg_d"; String fullnamepath "/ancillary_data/inland_water/m_avg_d"; } ancillary_data_inland_water_l_surf { String units "1"; String contentType "auxiliaryInformation"; String long_name "Long Surface Segment Size"; String description "Long segment size, operationally used as unit length over which to detrend the water surface, characterize the surface, and deconvolve the instrument pulse and subsurface effects from the water surface response."; String source "ATBD Table 5-2"; String origname "l_surf"; String fullnamepath "/ancillary_data/inland_water/l_surf"; } ancillary_data_inland_water_signal_window_top { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Signal Window Top"; String description "Upper limit above coarse water surface to include photons for analysis."; String source "ATBD Table 5-2"; String origname "signal_window_top"; String fullnamepath "/ancillary_data/inland_water/signal_window_top"; } ancillary_data_inland_water_lsbr_threshold { String units "1"; String contentType "auxiliaryInformation"; String long_name "LSBR Threshold"; String description "Threshold at which the LSBR indicates a significant transition from signal photon richness to noise."; String source "ATBD Table 5-2"; String origname "lsbr_threshold"; String fullnamepath "/ancillary_data/inland_water/lsbr_threshold"; } ancillary_data_inland_water_l_sub { String units "1"; String contentType "auxiliaryInformation"; String long_name "Long Subsurface Segment Size"; String description "Long segment size, operationally used as unit length over which to characterize the subsurface, and deconvolve the instrument pulse and subsurface effects from the water surface response."; String source "ATBD Table 5-2"; String origname "l_sub"; String fullnamepath "/ancillary_data/inland_water/l_sub"; } ancillary_data_inland_water_b2_sseg1 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Small Segment Height Bin Size"; String description "Bin size to be used for histogramming of small segment heights."; String source "ATBD Table 5-2"; String origname "b2_sseg1"; String fullnamepath "/ancillary_data/inland_water/b2_sseg1"; } ancillary_data_start_orbit { String units "1"; String contentType "auxiliaryInformation"; String long_name "Starting Orbit Number"; 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."; String source "Derived"; String origname "start_orbit"; String fullnamepath "/ancillary_data/start_orbit"; } ancillary_data_data_start_utc { String units "1"; String contentType "auxiliaryInformation"; String long_name "Start UTC Time of Granule (CCSDS-A, Actual)"; String description "UTC (in CCSDS-A format) of the first data point within the granule."; String source "Derived"; String origname "data_start_utc"; String fullnamepath "/ancillary_data/data_start_utc"; } ancillary_data_end_gpsweek { String units "weeks from 1980-01-06"; String contentType "auxiliaryInformation"; String long_name "Ending GPSWeek of Granule (Actual)"; String description "GPS week number of the last data point in the granule."; String source "Derived"; String origname "end_gpsweek"; String fullnamepath "/ancillary_data/end_gpsweek"; } ancillary_data_start_rgt { String units "1"; String contentType "auxiliaryInformation"; String long_name "Starting Reference Groundtrack"; 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."; String source "Derived"; Int32 valid_min 1; Int32 valid_max 1387; String origname "start_rgt"; String fullnamepath "/ancillary_data/start_rgt"; } ancillary_data_end_gpssow { String units "seconds"; String contentType "auxiliaryInformation"; String long_name "Ending GPS SOW of Granule (Actual)"; String description "GPS seconds-of-week of the last data point in the granule."; String source "Derived"; String origname "end_gpssow"; String fullnamepath "/ancillary_data/end_gpssow"; } ancillary_data_start_region { String units "1"; String contentType "auxiliaryInformation"; String long_name "Starting Region"; 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."; String source "Derived"; String origname "start_region"; String fullnamepath "/ancillary_data/start_region"; } ancillary_data_start_gpsweek { String units "weeks from 1980-01-06"; String contentType "auxiliaryInformation"; String long_name "Start GPSWeek of Granule (Actual)"; String description "GPS week number of the first data point in the granule."; String source "Derived"; String origname "start_gpsweek"; String fullnamepath "/ancillary_data/start_gpsweek"; } gt3r_rgt { String units "1"; String contentType "referenceInformation"; String long_name "Reference Ground track"; 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."; String source "ATL03"; Int16 valid_min 1; Int16 valid_max 1387; String origname "rgt"; String fullnamepath "/gt3r/rgt"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_qf_bias_fit { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Height Bias Fit Quality Flag"; String description "The height bias fit flag is set based on the value of the goodness of fit bias estimated as the difference between the centroid elevations of the observed surface water histogram and fitted integrated water surface model histogram. The flag values are set as follows: = -3 if H_bias_fit < -0.10 (m); -2 if -0.10 <= H_bias_fit < -0.05;-1 when -0.05 <= H_bias_fit < -0.01; 0 if -0.01 <= H_bias_fit < 0.01 (m); 1 if 0.01 <= H_bias_fit < 0.05; 2 if 0.05 < H_bias_fit < 0.10; 3 if 0.10 <= H_bias_fit; 4 if H_bias_fit is invalid."; String source "Inland Water ATBD"; String flag_meanings "below_threshold1 below_threshold2 below_threshold3 below_threshold4 below_threshold5 below_threshold6 equal_to_or_above_threshold6 invalid"; Int32 flag_values -3, -2, -1, 0, 1, 2, 3, 4; Int32 valid_min -3; Int32 valid_max 4; String origname "qf_bias_fit"; String fullnamepath "/gt3r/qf_bias_fit"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_sseg_mean_lon { String units "degrees_east"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Longitude"; String description "Mean longitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "sseg_mean_lon"; String fullnamepath "/gt3r/sseg_mean_lon"; String coordinates "gt3r_delta_time"; } gt3r_qf_ice { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Ice Quality Flag"; String description "The quality flag for ice describes the likelihood of ice on the short water body surface segment. 0 for QF_Bckgrd<= 2; 1 for 2 < QF_Bckgrd<= 4; 2 for 4 < QF_Bckgrd; 3 for (4 < QF_Bckgrd and QF_Cloud=1)"; String source "Inland Water ATBD"; String flag_meanings "qf_bckgrd_le_2 qf_bckgrd_le_4 qf_bckgrd_gt_4 qf_bckgrd_w_cloud"; Int32 flag_values 0, 1, 2, 3; Int32 valid_min 0; Int32 valid_max 3; String origname "qf_ice"; String fullnamepath "/gt3r/qf_ice"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_inland_water_body_type { Int16 _FillValue 127; String units "1"; String contentType "auxiliaryInformation"; String long_name "Body Type"; String description "Type of Inland Water Body, where 1=Lake, 2=Known Reservoir, 3=(Reserved for future use), 4=Ephemeral Water, 5=River, 6=Estuary or Bay, 7=Coastal Water, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "Lake Known_Reservoir Reserved_for_future_use Ephemeral_Water River Estuary_or_Bay Coastal_Water Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_type"; String fullnamepath "/gt3r/inland_water_body_type"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_inland_water_body_id { String contentType "referenceInformation"; String long_name "Body ID"; String description "Identifying signature of an individual inland water body. Each body of water is represented by a unique numeric value."; String source "ATL13 ATBD, Section 5.3.1 (C)"; Int32 _FillValue 2147483647; String units "1"; String origname "inland_water_body_id"; String fullnamepath "/gt3r/inland_water_body_id"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_segment_geoid { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "auxiliaryInformation"; String long_name "Segment Geoid"; String description "Applicable geoid value at reporting location for all short segment statistics."; String source "ATL03"; String origname "segment_geoid"; String fullnamepath "/gt3r/segment_geoid"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_qf_sseg_length { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Short Segment Length flag"; String description "The Short Segment Length flag is set based on the length of the short segment. The flag is set as follows: 0 if sseg_length< 50 (meters); 1 if 50 10,000 km2, 2=10,000>A>=1,000, 3=1,000>A>=100, 4=100>A>=10, 5=10>A>=1, 6=1>A>=0.1, 7=0.01>A, 8=Reserved, 9=Reserved"; String source "ATL13 ATBD, Section 5.3.1 (C)"; String flag_meanings "A>10000 10000>A>=1000 1000>A>=100 100>A>=10 10>A>=1 1>A>=0.1 0.01>A Reserved Reserved"; Int16 flag_values 1, 2, 3, 4, 5, 6, 7, 8, 9; Int16 valid_min 1; Int16 valid_max 9; String origname "inland_water_body_size"; String fullnamepath "/gt3r/inland_water_body_size"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_err_slope_trk { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "qualityInformation"; String long_name "Slope Error"; String description "Error included in segment_slope_trk_local."; String source "section 5.3.3 (C)"; String origname "err_slope_trk"; String fullnamepath "/gt3r/err_slope_trk"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_segment_slope_trk_bdy { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "physicalMeasurement"; String long_name "Water Body Slope"; String description "Along track water body surface slope."; String source "section 5.3.5 (A)"; String origname "segment_slope_trk_bdy"; String fullnamepath "/gt3r/segment_slope_trk_bdy"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_sseg_mean_lat { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Latitude"; String description "Mean latitude of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "sseg_mean_lat"; String fullnamepath "/gt3r/sseg_mean_lat"; String coordinates "gt3r_delta_time"; } gt3r_qf_spec_width { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Spectral Width Flag"; String description "The Spectral Width flag is set based on threshold checks for the estimated Spectral Width. The flag is set as follows: 0 if spec_width < 0.5; 1 if spec_width >= +0.5."; String source "Inland Water ATBD"; String flag_meanings "below_0.5 above_0.5"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "qf_spec_width"; String fullnamepath "/gt3r/qf_spec_width"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_qf_bckgrd { Int32 _FillValue 2147483647; String units "1"; String contentType "qualityInformation"; String long_name "Background Quality Flag"; String description "Describes the degree of background photons present in each short segment. bckgrd_dnsty_threshold1= 0.001 (counts per bi per Lseg); bckgrd_dnsty_threshold2= 0.01 (counts per bin per Lseg); bckgrd_dnsty_threshold3= 0.05 (counts per bin per Lseg); bckgrd_dnsty_threshold4= 0.1 (counts per bin per Lseg); bckgrd_dnsty_threshold5= 0.3 (counts per bin per Lseg); bckgrd_dnsty_threshold6= 0.5 (counts per bin per Lseg)"; String source "Inland Water ATBD"; String flag_meanings "equal_to_or_below_threshold1 equal_to_or_below_threshold2 equal_to_or_below_threshold3 equal_to_or_below_threshold4 equal_to_or_below_threshold5 equal_to_or_below_threshold6 above_threshold6"; Int32 flag_values 0, 1, 2, 3, 4, 5, 6; Int32 valid_min 0; Int32 valid_max 6; String origname "qf_bckgrd"; String fullnamepath "/gt3r/qf_bckgrd"; String coordinates "gt3r_delta_time gt3r_segment_lat gt3r_segment_lon"; } gt3r_sseg_mean_time { String contentType "auxiliaryInformation"; String long_name "Short Segment Mean Time"; String description "Mean time of the signal-qualified photons in a short segment."; String source "Inland Water ATBD"; Float64 _FillValue 1.7976931348623157e+308; String units "Seconds since 2018-01-01"; String origname "sseg_mean_time"; String fullnamepath "/gt3r/sseg_mean_time"; String coordinates "gt3r_delta_time"; } gt1l_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt1l/delta_time"; } gt1r_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt1r/delta_time"; } gt2l_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt2l/delta_time"; } gt2r_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt2r/delta_time"; } gt3l_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt3l/delta_time"; } gt3r_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Delta Time"; String standard_name "time"; 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."; String source "ATL03"; String coordinates "segment_lat segment_lon"; String origname "delta_time"; String fullnamepath "/gt3r/delta_time"; } orbit_info_crossing_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Ascending Node Crossing Time"; String standard_name "time"; String description "The time, in seconds since the ATLAS SDP GPS Epoch, at which the ascending node crosses the equator. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed."; String source "POD/PPD"; String origname "crossing_time"; String fullnamepath "/orbit_info/crossing_time"; } orbit_info_sc_orient_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Time of Last Spacecraft Orientation Change"; String standard_name "time"; 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."; String source "POD/PPD"; String origname "sc_orient_time"; String fullnamepath "/orbit_info/sc_orient_time"; } FakeDim0 { String units "level"; } FakeDim1 { String units "level"; } FakeDim3 { String units "level"; } FakeDim4 { String units "level"; } FakeDim5 { String units "level"; } DODS_EXTRA { String Unlimited_Dimension "gt1l_delta_time", "gt1r_delta_time", "gt2l_delta_time", "gt2r_delta_time", "gt3l_delta_time", "gt3r_delta_time", "orbit_info_crossing_time", "orbit_info_sc_orient_time"; } }