Attributes { HDF5_GLOBAL { String granule_type "ATL10"; String short_name "ATL10"; String level "3A"; String description "Estimates of freeboard using sea ice heights and available sea surface heights within at km length scale; contains statistics of sea surface samples used in the estimates."; 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/ATL10.001"; String identifier_product_doi_authority "http://dx.doi.org"; String identifier_product_type "ATL10"; 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 "2019-05-26T17:03:17.000000Z"; String hdfversion "HDF5 1.10.3"; String history "2019-05-26T17:03:17.000000Z;2f93a440-4b7f-336d-827d-21c3cb49f736;Created by PGE atlas_l3a_fb Version 3.1"; String identifier_file_uuid "2f93a440-4b7f-336d-827d-21c3cb49f736"; String identifier_product_format_version "3.2"; Float64 time_coverage_duration 5658.0000000000000; String time_coverage_end "2018-12-27T23:25:31.000000Z"; String time_coverage_start "2018-12-27T21:51:13.000000Z"; Float64 geospatial_lat_min -76.343291547282632; Float64 geospatial_lon_min -161.61795052787238; Float64 geospatial_lat_max -67.049312327424531; Float64 geospatial_lon_max 11.507966597329181; 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 L2A Normalized Relative Backscatter Profiles"; String identifier_file_product_type "ATL10"; 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 ATL10 is to provide along-track freeboard estimates and associated statistics."; String keywords "EARTH SCIENCE > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > 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 "2A"; 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 " ATL10-02_20181227215113_13790101_001_01.h5 NSIDC DAAC > National Snow and Ice Data Center DAAC nsidc@nsidc.org http://nsidc.org/daac/ pointOfContact 2019-05-26T17:03:17.000000Z ISO 19115-2 Geographic information - Metadata - Part 2: Extensions for imagery and gridded data ISO 19115-2:2009-02-15 ATL10-02_20181227215113_13790101_001_01.h5 2019-05-26T17:03:17.000000Z creation ATL10 The ECS Short Name 001 The ECS Version ID ATL10-02_20181227215113_13790101_001_01.h5 ProducerGranuleId The ICESat-2 ATL10 standard data product contains estimates of freeboard using sea ice elevations and available sea surface height within km length scale It also contains statist ics of sea surface samples used in the estimates. onGoing ATL10 001 largerWorkCitation eng geoscientificInformation AscendingCrossing: -147.55325193334264 StartLatitude: 90.000000000000000 StartDirection:D EndLatitude: 27.000000000000000 EndDirection: A gov.nasa.esdis.umm.orbitparameters OrbitParameters OrbitNumber: 1580 EquatorCrossingLongitude: -147.55325193334264 EquatorCrossingDateTime: 2018-12-27T21:51:14.515259Z gov.nasa.esdis.umm.orbitcalculatedspatialdomains OrbitCalculatedSpatialDomains 2018-12-27T21:51:13.000000Z 2018-12-27T23:25:31.000000Z dataset 2019-05-26T17:03:17.000000Z;2f93a440-4b7f-336d-827d-21c3cb49f736;Created by PGE atlas_l3a_fb Version 3.1 2019-05-26T17:03:17.000000Z "; String iso_19139_series_xml " ATL10.001 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 L2A Normalized Relative Backscatter Profiles 2016-06-09 revision 001 ATL10 The ECS Short Name 001 The ECS Version ID doi:10.5067/ATLAS/ATL10.002 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 ATL10 standard data product contains estimates of freeboard using sea ice elevations and available sea surface height within km length scale It also contains statistics of sea surface samples used in the estimates. The purpose of ATL10 is to provide along-track freeboard estimates and associated statistics. The software that generates the ATL10 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 > SPECTRAL/ENGINEERING > LIDAR > LIDAR BACKSCATTER > 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: 1.0 StartCircularLatitude: 0.0 gov.nasa.esdis.umm.orbitparameters OrbitParameters 2005-01-01T00:00:00Z 2020-12-31T23:59:59Z 2A 2A 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 https://doi.org/10.5067/ATLAS/ATL10.002 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 "ATL10_SDP"; String title "ICESat-2-SIPS-SPEC-4207 - ATLAS Science Algorithm Standard Data Product (SDP) Volume 12 (ATL10). 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/ATL10.001"; 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 L2A Normalized Relative Backscatter Profiles"; String shortName "ATL10"; String revisionDate "2016-06-09"; String resourceProviderOrganizationName "National Aeronautics and Space Administration (NASA)"; String abstract "The ICESat-2 ATL10 standard data product contains estimates of freeboard using sea ice elevations and available sea surface height within km length scale It also contains statistics of sea surface samples used in the estimates."; String purpose "The purpose of ATL10 is to provide along-track freeboard estimates and associated statistics."; String credit "The software that generates the ATL10 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 "2019-05-26T17:03:17.000000Z"; String uuid "2f93a440-4b7f-336d-827d-21c3cb49f736"; String fileName "ATL10-02_20181227215113_13790101_001_01.h5"; String VersionID "001"; String language "eng"; String characterSet "utf8"; String shortName "ATL10"; String originatorOrganizationName "GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System"; String abstract "The ICESat-2 ATL10 standard data product contains estimates of freeboard using sea ice elevations and available sea surface height within km length scale It also contains statistics of sea surface samples used in the estimates."; String purpose "The purpose of ATL10 is to provide along-track freeboard estimates and associated statistics."; String credit "The software that generates the ATL10 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 -67.049312327424531; Float64 eastBoundLongitude 11.507966597329181; Float64 southBoundLatitude -76.343291547282632; Float64 westBoundLongitude -161.61795052787238; String rangeBeginningDateTime "2018-12-27T22:55:53.135649Z"; String rangeEndingDateTime "2018-12-27T23:07:40.551485Z"; 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 "2019-05-26T17:03:19.000000Z"; String fileName "ATL10-02_20181227215113_13790101_001_01.qa"; String fullnamepath "/METADATA/QADatasetIdentification"; } METADATA_Lineage { } METADATA_Lineage_ANC25_10 { String description "HDF5 template file that defines the organization and default content of the product."; String fileName "atl10_template.h5"; String shortName "ANC25-10"; String uuid "7bb9076a-4a4f-3144-bee3-2dbfb0e8ff1f"; String version "031"; String fullnamepath "/METADATA/Lineage/ANC25-10"; } METADATA_Lineage_ANC26_10 { String description "HDF5 template file that defines the organization and default content of the product metadata."; String fileName "atl10_metadata_template.h5"; String shortName "ANC26-10"; String uuid "84b439e2-04d4-3b4a-b972-cce018112f55"; String version "031"; String fullnamepath "/METADATA/Lineage/ANC26-10"; } METADATA_Lineage_ANC36_10 { String description "ISO 19139 XML file containing Series-level metadata information."; String fileName "ATL10.001.series.xml"; String shortName "ANC36-10"; String uuid "544e36e6-e501-396b-a5a3-98ff64047651"; String version "001"; String fullnamepath "/METADATA/Lineage/ANC36-10"; } METADATA_Lineage_ANC38_10 { String description "ISO 19139 XML file containing DataSet-level metadata information."; String fileName "ATL10.001.dataset.xml"; String shortName "ANC38-10"; String uuid "8cf42302-f885-3b63-bae4-a3b08abd8c8b"; String version "001"; String fullnamepath "/METADATA/Lineage/ANC38-10"; } METADATA_Lineage_ANC35 { String description "Distance-to-land map provided by the Sea Ice ATBD lead"; String fileName "distmap_ssmi_antarc_2km_20190227_01.dat"; String shortName "ANC35"; String uuid "680ca8f4-7498-33c8-b97f-d6ceb3fd9c0a"; String version "20190227"; String fullnamepath "/METADATA/Lineage/ANC35"; } METADATA_Lineage_ATL07 { String description "ATLAS/ICESat-2 L3A Sea Ice Height"; String fileName "ATL07-02_20181227215113_13790101_001_01.h5"; String shortName "ATL07"; String uuid "01ca7505-c8eb-3262-a6a8-3f8207f7fd23"; String version "001"; Int32 start_cycle 1; Int32 end_cycle 1; Int32 start_orbit 1580; Int32 end_orbit 1580; Int32 start_rgt 1379; Int32 end_rgt 1379; Int32 start_region 2; Int32 end_region 2; Int32 start_geoseg 1296754; Int32 end_geoseg 1672002; String fullnamepath "/METADATA/Lineage/ATL07"; } 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_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_fb_001408596.ctl"; String shortName "CNTL"; String version "1"; String fullnamepath "/METADATA/Lineage/Control"; } 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_fb_001408596.ctl"; String stepDateTime "2019-05-26T17:03:20.000000Z"; 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_fb_001408596.ctl"; String stepDateTime "2019-05-26T17:03:30.000000Z"; String fullnamepath "/METADATA/ProcessStep/Metadata"; } METADATA_ProcessStep_PGE { String ATBDDate "11/20/17"; String ATBDTitle "ICESat-2-SIPS-SPEC-160 - SIPs: Sea Ice Products L5 Specification Document"; String ATBDVersion "Draft"; String documentation "ICESat-2-SIPS-SPEC-5223 - ATLAS Science Algorithm Software Design Description (SDD) Volume 22 (atlas_l3a_fbi). Revision -."; String documentDate "12/1/17"; String processDescription "Computes estimates of freeboard using sea ice heights and available sea surface heights within at km length scale; contains statistics of sea surface samples used in the estimates."; String identifier "atlas_l3a_fb"; String softwareVersion "Version 3.1"; String softwareDate "Apr 23 2019"; String softwareTitle "ASAS L3A Sea Ice Freeboard PGE"; String runTimeParameters "CTL_atlas_l3a_fb_001408596.ctl"; String stepDateTime "2019-05-26T17:03:17.000000Z"; 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 "atl10_qa_util"; String softwareVersion "Version 3.1"; String softwareDate "Apr 23 2019"; String softwareTitle "ATL10 QA Utility"; String runTimeParameters "CTL_atlas_l3a_fb_001408596.ctl"; String stepDateTime "2019-05-26T17:03:19.000000Z"; String fullnamepath "/METADATA/ProcessStep/QA"; } gt1r { String Description "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce3"; String atlas_beam_type "strong"; String groundtrack_id "gt1r"; String atmosphere_profile "profile_1"; String atlas_spot_number "5"; String sc_orientation "Forward"; String fullnamepath "/gt1r"; } gt1r_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt1r/freeboard_beam_segment"; } gt1r_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments"; } gt1r_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard"; } gt1r_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical"; } gt1r_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt1r/leads"; } gt2r { String Description "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce2"; String atlas_beam_type "strong"; String groundtrack_id "gt2r"; String atmosphere_profile "profile_2"; String atlas_spot_number "3"; String sc_orientation "Forward"; String fullnamepath "/gt2r"; } gt2r_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt2r/freeboard_beam_segment"; } gt2r_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments"; } gt2r_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard"; } gt2r_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical"; } gt2r_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt2r/leads"; } gt1l { String Description "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce3"; String atlas_beam_type "weak"; String groundtrack_id "gt1l"; String atmosphere_profile "profile_1"; String atlas_spot_number "6"; String sc_orientation "Forward"; String fullnamepath "/gt1l"; } gt1l_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt1l/freeboard_beam_segment"; } gt1l_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments"; } gt1l_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard"; } gt1l_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical"; } gt1l_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt1l/leads"; } freeboard_swath_segment { String Description "Contains parameters related to quality and corrections on the the freeboard values"; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/freeboard_swath_segment"; } freeboard_swath_segment_gt1r { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce3"; String atlas_beam_type "strong"; String groundtrack_id "gt1r"; String atmosphere_profile "profile_1"; String atlas_spot_number "5"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt1r"; } freeboard_swath_segment_gt1r_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard"; } freeboard_swath_segment_gt2r { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce2"; String atlas_beam_type "strong"; String groundtrack_id "gt2r"; String atmosphere_profile "profile_2"; String atlas_spot_number "3"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt2r"; } freeboard_swath_segment_gt2r_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard"; } freeboard_swath_segment_gt1l { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce3"; String atlas_beam_type "weak"; String groundtrack_id "gt1l"; String atmosphere_profile "profile_1"; String atlas_spot_number "6"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt1l"; } freeboard_swath_segment_gt1l_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard"; } freeboard_swath_segment_gt3l { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce1"; String atlas_beam_type "weak"; String groundtrack_id "gt3l"; String atmosphere_profile "profile_3"; String atlas_spot_number "2"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt3l"; } freeboard_swath_segment_gt3l_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard"; } freeboard_swath_segment_gt2l { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce2"; String atlas_beam_type "weak"; String groundtrack_id "gt2l"; String atmosphere_profile "profile_2"; String atlas_spot_number "4"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt2l"; } freeboard_swath_segment_gt2l_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard"; } freeboard_swath_segment_gt3r { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String atlas_pce "pce1"; String atlas_beam_type "strong"; String groundtrack_id "gt3r"; String atmosphere_profile "profile_3"; String atlas_spot_number "1"; String sc_orientation "Forward"; String fullnamepath "/freeboard_swath_segment/gt3r"; } freeboard_swath_segment_gt3r_swath_freeboard { String Description "Contains freeboard estimate and associated height segment parameters computed by the swath reference surface."; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard"; } 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 "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce1"; String atlas_beam_type "weak"; String groundtrack_id "gt3l"; String atmosphere_profile "profile_3"; String atlas_spot_number "2"; String sc_orientation "Forward"; String fullnamepath "/gt3l"; } gt3l_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt3l/freeboard_beam_segment"; } gt3l_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments"; } gt3l_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard"; } gt3l_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical"; } gt3l_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt3l/leads"; } gt2l { String Description "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce2"; String atlas_beam_type "weak"; String groundtrack_id "gt2l"; String atmosphere_profile "profile_2"; String atlas_spot_number "4"; String sc_orientation "Forward"; String fullnamepath "/gt2l"; } gt2l_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt2l/freeboard_beam_segment"; } gt2l_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments"; } gt2l_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard"; } gt2l_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical"; } gt2l_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt2l/leads"; } ancillary_data { String Description "Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants."; String fullnamepath "/ancillary_data"; } ancillary_data_freeboard_estimation { String Description "Contains ancillary parameters related to the surface classification algorithm."; String fullnamepath "/ancillary_data/freeboard_estimation"; } gt3r { String Description "Each group contains the segments for one Ground Track. As ICESat-2 orbits the earth, sequential transmit pulses illuminate six ground tracks on the surface of the earth. The track width is approximately 10m wide. Each ground track is numbered, according to the laser spot number that generates a given ground track. Ground tracks from the strong beams are therefore numbered 1, 3 and 5; ground tracks from the weak beams are numbered 2, 4 and 6. See ICESat-2 L2A ATBD."; String atlas_pce "pce1"; String atlas_beam_type "strong"; String groundtrack_id "gt3r"; String atmosphere_profile "profile_3"; String atlas_spot_number "1"; String sc_orientation "Forward"; String fullnamepath "/gt3r"; } gt3r_freeboard_beam_segment { String Description "Contains freeboard estimate and associated height segment parameters for only the sea ice segments by beam."; String data_rate "Data within this group are stored at the freeboard swath segment rate."; String fullnamepath "/gt3r/freeboard_beam_segment"; } gt3r_freeboard_beam_segment_height_segments { String Description "Contains height segment parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments"; } gt3r_freeboard_beam_segment_beam_freeboard { String Description "Contains freeboard estimate and associated parameters computed by its beam reference surface."; String data_rate "Data within this group are stored at the variable segment rate."; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard"; } gt3r_freeboard_beam_segment_geophysical { String Description "Contains geophysical parameters from ATL07 associated with the freeboard height."; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical"; } gt3r_leads { String Description "Contains parameters relating to the freeboard values."; String data_rate "Data within this group are stored at the lead index rate."; String fullnamepath "/gt3r/leads"; } 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_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_fb_height"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude"; } gt1r_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt1r_freeboard_beam_segment_height_segments_delta_time gt1r_freeboard_beam_segment_height_segments_latitude gt1r_freeboard_beam_segment_height_segments_longitude"; } gt1r_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt1r/freeboard_beam_segment/longitude"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude"; } gt1r_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt1r/freeboard_beam_segment/latitude"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude"; } gt1r_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt1r_freeboard_beam_segment_beam_freeboard_delta_time gt1r_freeboard_beam_segment_beam_freeboard_latitude gt1r_freeboard_beam_segment_beam_freeboard_longitude"; } gt1r_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_fb_length"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude"; } gt1r_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt1r_freeboard_beam_segment_geophysical_delta_time gt1r_freeboard_beam_segment_geophysical_latitude gt1r_freeboard_beam_segment_geophysical_longitude"; } gt1r_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt1r/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_lead_n"; String coordinates "gt1r_freeboard_beam_segment_delta_time gt1r_freeboard_beam_segment_latitude gt1r_freeboard_beam_segment_longitude"; } gt1r_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt1r/leads/lead_height"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude gt1r_leads_longitude"; } gt1r_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt1r/leads/lead_length"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude gt1r_leads_longitude"; } gt1r_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt1r/leads/lead_sigma"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude gt1r_leads_longitude"; } gt1r_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt1r/leads/longitude"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude"; } gt1r_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt1r/leads/latitude"; String coordinates "gt1r_leads_delta_time gt1r_leads_longitude"; } gt1r_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt1r/leads/ssh_n"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude gt1r_leads_longitude"; } gt1r_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt1r/leads/ssh_ndx"; String coordinates "gt1r_leads_delta_time gt1r_leads_latitude gt1r_leads_longitude"; } gt2r_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_fb_height"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude"; } gt2r_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt2r_freeboard_beam_segment_height_segments_delta_time gt2r_freeboard_beam_segment_height_segments_latitude gt2r_freeboard_beam_segment_height_segments_longitude"; } gt2r_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt2r/freeboard_beam_segment/longitude"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude"; } gt2r_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt2r/freeboard_beam_segment/latitude"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude"; } gt2r_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt2r_freeboard_beam_segment_beam_freeboard_delta_time gt2r_freeboard_beam_segment_beam_freeboard_latitude gt2r_freeboard_beam_segment_beam_freeboard_longitude"; } gt2r_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_fb_length"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude"; } gt2r_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt2r_freeboard_beam_segment_geophysical_delta_time gt2r_freeboard_beam_segment_geophysical_latitude gt2r_freeboard_beam_segment_geophysical_longitude"; } gt2r_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt2r/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_lead_n"; String coordinates "gt2r_freeboard_beam_segment_delta_time gt2r_freeboard_beam_segment_latitude gt2r_freeboard_beam_segment_longitude"; } gt2r_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt2r/leads/lead_height"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude gt2r_leads_longitude"; } gt2r_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt2r/leads/lead_length"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude gt2r_leads_longitude"; } gt2r_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt2r/leads/lead_sigma"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude gt2r_leads_longitude"; } gt2r_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt2r/leads/longitude"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude"; } gt2r_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt2r/leads/latitude"; String coordinates "gt2r_leads_delta_time gt2r_leads_longitude"; } gt2r_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt2r/leads/ssh_n"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude gt2r_leads_longitude"; } gt2r_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt2r/leads/ssh_ndx"; String coordinates "gt2r_leads_delta_time gt2r_leads_latitude gt2r_leads_longitude"; } gt1l_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_fb_height"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude"; } gt1l_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt1l_freeboard_beam_segment_height_segments_delta_time gt1l_freeboard_beam_segment_height_segments_latitude gt1l_freeboard_beam_segment_height_segments_longitude"; } gt1l_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt1l/freeboard_beam_segment/longitude"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude"; } gt1l_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt1l/freeboard_beam_segment/latitude"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude"; } gt1l_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt1l_freeboard_beam_segment_beam_freeboard_delta_time gt1l_freeboard_beam_segment_beam_freeboard_latitude gt1l_freeboard_beam_segment_beam_freeboard_longitude"; } gt1l_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_fb_length"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude"; } gt1l_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt1l_freeboard_beam_segment_geophysical_delta_time gt1l_freeboard_beam_segment_geophysical_latitude gt1l_freeboard_beam_segment_geophysical_longitude"; } gt1l_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt1l/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_lead_n"; String coordinates "gt1l_freeboard_beam_segment_delta_time gt1l_freeboard_beam_segment_latitude gt1l_freeboard_beam_segment_longitude"; } gt1l_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt1l/leads/lead_height"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude gt1l_leads_longitude"; } gt1l_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt1l/leads/lead_length"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude gt1l_leads_longitude"; } gt1l_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt1l/leads/lead_sigma"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude gt1l_leads_longitude"; } gt1l_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt1l/leads/longitude"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude"; } gt1l_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt1l/leads/latitude"; String coordinates "gt1l_leads_delta_time gt1l_leads_longitude"; } gt1l_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt1l/leads/ssh_n"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude gt1l_leads_longitude"; } gt1l_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt1l/leads/ssh_ndx"; String coordinates "gt1l_leads_delta_time gt1l_leads_latitude gt1l_leads_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt2l { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt2l leads"; String description "Number of gt2l leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt2l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt2l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt2r { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt2r leads"; String description "Number of gt2r leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt2r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt2r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt3r { String units "1"; String contentType "referenceInformation"; String long_name "Swath index gt3r first lead"; String description "1-based index to first /gt3r/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String origname "fbswath_lead_ndx_gt3r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt3r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard swath-segment"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/fbswath_fb_height"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt1r { String units "1"; String long_name "Swath index gt1r first lead"; String description "1-based index to first /gt1r/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String contentType "referenceInformation"; String origname "fbswath_lead_ndx_gt1r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt1r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt1l { String units "1"; String contentType "referenceInformation"; String long_name "Swath index gt1l first lead"; String description "1-based index to first /gt1l/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String origname "fbswath_lead_ndx_gt1l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt1l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Reference surface height for the freeboard swath-segment"; String description "Reference surface computed by the weighted mean of leads in freeboard swath-segment"; String source "ATBD section 5"; String origname "fbswath_refsurf_height"; String fullnamepath "/freeboard_swath_segment/fbswath_refsurf_height"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt3r { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt3r leads"; String description "Number of gt3r leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt3r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt3r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_fb_length { String contentType "modelResult"; String long_name "Length of freeboard swath-segment"; String description "Length of freeboard swath-segment"; String source "ATBD section 5"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "fbswath_fb_length"; String fullnamepath "/freeboard_swath_segment/fbswath_fb_length"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String flag_meanings "n"; String origname "seg_dist_x"; String fullnamepath "/freeboard_swath_segment/seg_dist_x"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude"; } freeboard_swath_segment_gt1r_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt1r_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt1r_swath_freeboard_delta_time freeboard_swath_segment_gt1r_swath_freeboard_latitude freeboard_swath_segment_gt1r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude"; } freeboard_swath_segment_gt2r_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_gt2r_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt2r_swath_freeboard_delta_time freeboard_swath_segment_gt2r_swath_freeboard_latitude freeboard_swath_segment_gt2r_swath_freeboard_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt2r { String units "1"; String contentType "referenceInformation"; String long_name "Swath index gt2r first lead"; String description "1-based index to first /gt2r/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String origname "fbswath_lead_ndx_gt2r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt2r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude"; } freeboard_swath_segment_gt1l_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_gt1l_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt1l_swath_freeboard_delta_time freeboard_swath_segment_gt1l_swath_freeboard_latitude freeboard_swath_segment_gt1l_swath_freeboard_longitude"; } freeboard_swath_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/longitude"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude"; } freeboard_swath_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/latitude"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_fb_sigma { String contentType "modelResult"; String long_name "Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard swath-segment"; String source "ATBD section 5"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt1l { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt1l leads"; String description "Number of gt1l leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt1l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt1l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "freeboard histogram"; String description "Swath Freeboard (using fbswath reference surface height) histogram (distribution) for this freeboard swath-segment"; String source "ATBD section 5"; String origname "fbswath_fb_hist"; String fullnamepath "/freeboard_swath_segment/fbswath_fb_hist"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude"; } freeboard_swath_segment_gt3l_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_gt3l_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt3l_swath_freeboard_delta_time freeboard_swath_segment_gt3l_swath_freeboard_latitude freeboard_swath_segment_gt3l_swath_freeboard_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt2l { String units "1"; String contentType "referenceInformation"; String long_name "Swath index gt2l first lead"; String description "1-based index to first /gt2l/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String origname "fbswath_lead_ndx_gt2l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt2l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_refsurf_interp_flag { String units "1"; String contentType "referenceInformation"; String long_name "reference surface interpolation flag"; String description "Identifies swath segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; String origname "fbswath_refsurf_interp_flag"; String fullnamepath "/freeboard_swath_segment/fbswath_refsurf_interp_flag"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt3l { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt3l leads"; String description "Number of gt3l leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt3l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt3l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "sigma of freeboard swath-segment refsurf"; String description "The sigma (standard deviation) of reference surface for this freeboard swath-segment. weighted combination of the lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "fbswath_refsurf_sigma"; String fullnamepath "/freeboard_swath_segment/fbswath_refsurf_sigma"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_fb_width { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Width of freeboard swath-segment"; String description "Width of freeboard swath-segment"; String source "ATBD section 5"; String origname "fbswath_fb_width"; String fullnamepath "/freeboard_swath_segment/fbswath_fb_width"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_fbswath_lead_ndx_gt3l { String units "1"; String contentType "referenceInformation"; String long_name "Swath index gt3l first lead"; String description "1-based index to first /gt3l/leads lead used in this swath's reference surface"; String source "ATBD section 5"; String origname "fbswath_lead_ndx_gt3l"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_ndx_gt3l"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude"; } freeboard_swath_segment_gt2l_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_gt2l_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt2l_swath_freeboard_delta_time freeboard_swath_segment_gt2l_swath_freeboard_latitude freeboard_swath_segment_gt2l_swath_freeboard_longitude"; } freeboard_swath_segment_fbswath_lead_n_gt1r { String units "1"; String contentType "referenceInformation"; String long_name "Number of gt1r leads"; String description "Number of gt1r leads used for this swath's reference surface"; String source "Sea Ice ATBD"; String origname "fbswath_lead_n_gt1r"; String fullnamepath "/freeboard_swath_segment/fbswath_lead_n_gt1r"; String coordinates "freeboard_swath_segment_delta_time freeboard_swath_segment_latitude freeboard_swath_segment_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_fbswath_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "estimate of the freeboard height based on entire swath"; String source "ATBD section 5"; String origname "fbswath_fb_height"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/fbswath_fb_height"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_height_segment_id { String units "1"; String contentType "referenceInformation"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String origname "height_segment_id"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/height_segment_id"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_fbswath_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "fbswath_fb_confidence"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/fbswath_fb_confidence"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_longitude { String contentType "referenceInformation"; String long_name "Longitude"; Float64 _FillValue 1.7976931348623157e+308; String units "degrees_east"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "section 3.1.9"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/longitude"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude"; } freeboard_swath_segment_gt3r_swath_freeboard_latitude { Float64 _FillValue 1.7976931348623157e+308; String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "section 3.1.9"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/latitude"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_fbswath_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "Sigma ( standard deviation) estimate of the freeboard height"; String source "ATBD section 5"; String origname "fbswath_fb_sigma"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/fbswath_fb_sigma"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_fbswath_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "fbswath_fb_quality_flag"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/fbswath_fb_quality_flag"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } freeboard_swath_segment_gt3r_swath_freeboard_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment group. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/fbswath_ndx"; String coordinates "freeboard_swath_segment_gt3r_swath_freeboard_delta_time freeboard_swath_segment_gt3r_swath_freeboard_latitude freeboard_swath_segment_gt3r_swath_freeboard_longitude"; } 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 error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD_Failure; 5=other failure."; String source "Operations"; String flag_meanings "no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE"; 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_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_fb_height"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude"; } gt3l_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt3l_freeboard_beam_segment_height_segments_delta_time gt3l_freeboard_beam_segment_height_segments_latitude gt3l_freeboard_beam_segment_height_segments_longitude"; } gt3l_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt3l/freeboard_beam_segment/longitude"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude"; } gt3l_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt3l/freeboard_beam_segment/latitude"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude"; } gt3l_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt3l_freeboard_beam_segment_beam_freeboard_delta_time gt3l_freeboard_beam_segment_beam_freeboard_latitude gt3l_freeboard_beam_segment_beam_freeboard_longitude"; } gt3l_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_fb_length"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude"; } gt3l_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt3l_freeboard_beam_segment_geophysical_delta_time gt3l_freeboard_beam_segment_geophysical_latitude gt3l_freeboard_beam_segment_geophysical_longitude"; } gt3l_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt3l/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_lead_n"; String coordinates "gt3l_freeboard_beam_segment_delta_time gt3l_freeboard_beam_segment_latitude gt3l_freeboard_beam_segment_longitude"; } gt3l_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt3l/leads/lead_height"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude gt3l_leads_longitude"; } gt3l_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt3l/leads/lead_length"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude gt3l_leads_longitude"; } gt3l_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt3l/leads/lead_sigma"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude gt3l_leads_longitude"; } gt3l_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt3l/leads/longitude"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude"; } gt3l_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt3l/leads/latitude"; String coordinates "gt3l_leads_delta_time gt3l_leads_longitude"; } gt3l_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt3l/leads/ssh_n"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude gt3l_leads_longitude"; } gt3l_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt3l/leads/ssh_ndx"; String coordinates "gt3l_leads_delta_time gt3l_leads_latitude gt3l_leads_longitude"; } gt2l_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_fb_height"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude"; } gt2l_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt2l_freeboard_beam_segment_height_segments_delta_time gt2l_freeboard_beam_segment_height_segments_latitude gt2l_freeboard_beam_segment_height_segments_longitude"; } gt2l_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt2l/freeboard_beam_segment/longitude"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude"; } gt2l_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt2l/freeboard_beam_segment/latitude"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude"; } gt2l_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt2l_freeboard_beam_segment_beam_freeboard_delta_time gt2l_freeboard_beam_segment_beam_freeboard_latitude gt2l_freeboard_beam_segment_beam_freeboard_longitude"; } gt2l_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_fb_length"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude"; } gt2l_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt2l_freeboard_beam_segment_geophysical_delta_time gt2l_freeboard_beam_segment_geophysical_latitude gt2l_freeboard_beam_segment_geophysical_longitude"; } gt2l_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt2l/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_lead_n"; String coordinates "gt2l_freeboard_beam_segment_delta_time gt2l_freeboard_beam_segment_latitude gt2l_freeboard_beam_segment_longitude"; } gt2l_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt2l/leads/lead_height"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude gt2l_leads_longitude"; } gt2l_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt2l/leads/lead_length"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude gt2l_leads_longitude"; } gt2l_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt2l/leads/lead_sigma"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude gt2l_leads_longitude"; } gt2l_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt2l/leads/longitude"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude"; } gt2l_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt2l/leads/latitude"; String coordinates "gt2l_leads_delta_time gt2l_leads_longitude"; } gt2l_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt2l/leads/ssh_n"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude gt2l_leads_longitude"; } gt2l_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt2l/leads/ssh_ndx"; String coordinates "gt2l_leads_delta_time gt2l_leads_latitude gt2l_leads_longitude"; } 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_freeboard_estimation_fbswath_fb_hist_max { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Freeboard Histogram Maximum Height"; String description "Freeboard histogram maximum height bin center for any swath segment."; String source "Sea Ice ATBD"; String origname "fbswath_fb_hist_max"; String fullnamepath "/ancillary_data/freeboard_estimation/fbswath_fb_hist_max"; } ancillary_data_freeboard_estimation_multi_beam_disable_flag { String units "1"; String contentType "auxiliaryInformation"; String long_name "miltibeam_disable_flag"; String description "disable multi-beam (intra-pair and inter-pair) freeboard calculations"; String source "Sea Ice ATBD"; String flag_meanings "no yes"; Int32 flag_values 0, 1; Int32 valid_min 0; Int32 valid_max 1; String origname "multi_beam_disable_flag"; String fullnamepath "/ancillary_data/freeboard_estimation/multi_beam_disable_flag"; } ancillary_data_freeboard_estimation_fbswath_fb_hist_min { String units "meters"; String contentType "auxiliaryInformation"; String long_name "Freeboard Histogram Minimum Height"; String description "Freeboard histogram minimum height bin center for any swath segment."; String source "Sea Ice ATBD"; String origname "fbswath_fb_hist_min"; String fullnamepath "/ancillary_data/freeboard_estimation/fbswath_fb_hist_min"; } ancillary_data_freeboard_estimation_fill_height_pct { String units "1"; String contentType "auxiliaryInformation"; String long_name "fill_height_pct"; String description "percentile of sorted heights (in fraction)"; String source "Sea Ice ATBD"; String origname "fill_height_pct"; String fullnamepath "/ancillary_data/freeboard_estimation/fill_height_pct"; } ancillary_data_freeboard_estimation_ic_thresh1 { String units "1"; String contentType "auxiliaryInformation"; String long_name "minimum ice concentration filter 1"; String description "Minimum ice concentration for filtering reference surfaces"; String source "Sea Ice ATBD"; String origname "ic_thresh1"; String fullnamepath "/ancillary_data/freeboard_estimation/ic_thresh1"; } ancillary_data_freeboard_estimation_l { String units "meters"; String contentType "auxiliaryInformation"; String long_name "fb_seg_len"; String description "Along track swath segment length for freeboard calculations"; String source "Sea Ice ATBD"; String origname "l"; String fullnamepath "/ancillary_data/freeboard_estimation/l"; } ancillary_data_freeboard_estimation_refsurf_slope_fill { String units "degrees"; String contentType "auxiliaryInformation"; String long_name "ssh_slope_fill"; String description "Filled SSH sloper estimate"; String source "Sea Ice ATBD"; String origname "refsurf_slope_fill"; String fullnamepath "/ancillary_data/freeboard_estimation/refsurf_slope_fill"; } ancillary_data_freeboard_estimation_maxgapht { String units "meters"; String contentType "auxiliaryInformation"; String long_name "max gap height"; String description "Allowable height separation between refsurf heights across time gap"; String source "Sea Ice ATBD"; String origname "maxgapht"; String fullnamepath "/ancillary_data/freeboard_estimation/maxgapht"; } ancillary_data_freeboard_estimation_n_fillpass { String units "1"; String contentType "auxiliaryInformation"; String long_name "n_fillpass"; String description "Number of passes for gap filling"; String source "Sea Ice ATBD"; String origname "n_fillpass"; String fullnamepath "/ancillary_data/freeboard_estimation/n_fillpass"; } ancillary_data_freeboard_estimation_refsurf_h_offset1 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "h_offset1"; String description "height offset for fill refsurf bound check"; String source "Sea Ice ATBD"; String origname "refsurf_h_offset1"; String fullnamepath "/ancillary_data/freeboard_estimation/refsurf_h_offset1"; } ancillary_data_freeboard_estimation_refsurf_sd_fill { String units "meters"; String contentType "auxiliaryInformation"; String long_name "ssh_sd_fill"; String description "Filled SSH stdev estimate"; String source "Sea Ice ATBD"; String origname "refsurf_sd_fill"; String fullnamepath "/ancillary_data/freeboard_estimation/refsurf_sd_fill"; } ancillary_data_freeboard_estimation_refsurf_h_offset2 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "h_offset2"; String description "height offset for fill refsurf estimate"; String source "Sea Ice ATBD"; String origname "refsurf_h_offset2"; String fullnamepath "/ancillary_data/freeboard_estimation/refsurf_h_offset2"; } ancillary_data_freeboard_estimation_ht_thresh2 { String units "meters"; String contentType "auxiliaryInformation"; String long_name "height threshold 2"; String description "Refsurf height difference threshold for consecutive estimates"; String source "Sea Ice ATBD"; String origname "ht_thresh2"; String fullnamepath "/ancillary_data/freeboard_estimation/ht_thresh2"; } ancillary_data_freeboard_estimation_ht_thresh1 { String units "meters"; String contentType "auxiliaryInformation"; String description "Refsurf height difference threshold for low concentration cases"; String source "Sea Ice ATBD"; String long_name "height threshold 1"; String origname "ht_thresh1"; String fullnamepath "/ancillary_data/freeboard_estimation/ht_thresh1"; } ancillary_data_freeboard_estimation_refsurf_slope_ub { String units "degrees"; String contentType "auxiliaryInformation"; String long_name "ssh_slope_ub"; String description "Upper bound for SSH slope"; String source "Sea Ice ATBD"; String origname "refsurf_slope_ub"; String fullnamepath "/ancillary_data/freeboard_estimation/refsurf_slope_ub"; } ancillary_data_freeboard_estimation_lb_n_f { String units "1"; String contentType "auxiliaryInformation"; String long_name "lb_n_f"; String description "Lower bounds on number of SSH estimates"; String source "Sea Ice ATBD"; String origname "lb_n_f"; String fullnamepath "/ancillary_data/freeboard_estimation/lb_n_f"; } ancillary_data_freeboard_estimation_fill_ub_width { String units "meters"; String contentType "auxiliaryInformation"; String long_name "fill_ub_width"; String description "maximum width for fill segments (width of gaussian from fine tracking)"; String source "Sea Ice ATBD"; String origname "fill_ub_width"; String fullnamepath "/ancillary_data/freeboard_estimation/fill_ub_width"; } ancillary_data_freeboard_estimation_min_land_dist { String units "km"; String contentType "auxiliaryInformation"; String long_name "minimum distance from land"; String description "Minimum distance from land for filtering reference surface"; String source "Sea Ice ATBD"; String origname "min_land_dist"; String fullnamepath "/ancillary_data/freeboard_estimation/min_land_dist"; } ancillary_data_freeboard_estimation_fill_snow_depth { String units "1"; String contentType "auxiliaryInformation"; String long_name "fill_snow_depth"; String description "snow depth bias for fill segments"; String source "Sea Ice ATBD"; String origname "fill_snow_depth"; String fullnamepath "/ancillary_data/freeboard_estimation/fill_snow_depth"; } ancillary_data_freeboard_estimation_ic_thresh2 { String units "1"; String contentType "auxiliaryInformation"; String long_name "minimum ice concentration filter 2"; String description "Reference surfaces estimates filtered below this ice concentration"; String source "Sea Ice ATBD"; String origname "ic_thresh2"; String fullnamepath "/ancillary_data/freeboard_estimation/ic_thresh2"; } ancillary_data_freeboard_estimation_maxgaptime { String units "seconds"; String contentType "auxiliaryInformation"; String long_name "max gap time"; String description "Maximum allowable time gap for interpolation"; String source "Sea Ice ATBD"; String origname "maxgaptime"; String fullnamepath "/ancillary_data/freeboard_estimation/maxgaptime"; } ancillary_data_freeboard_estimation_height_segment_fit_quality_flag_min { String units "1"; String contentType "auxiliaryInformation"; String long_name "Minimum Fit Quality to Use"; String description "The minimum height segment fit quality flag value for which an ATL07 sea ice segment is considered for use within the freeboard height computations."; String source "Sea Ice ATBD"; String origname "height_segment_fit_quality_flag_min"; String fullnamepath "/ancillary_data/freeboard_estimation/height_segment_fit_quality_flag_min"; } ancillary_data_freeboard_estimation_height_segment_fit_quality_flag_max { String units "1"; String contentType "auxiliaryInformation"; String long_name "Maximum Fit Quality to Use"; String description "The maximum height segment fit quality flag value for which an ATL07 sea ice segment is considered for use within the freeboard height computations."; String source "Sea Ice ATBD"; String origname "height_segment_fit_quality_flag_max"; String fullnamepath "/ancillary_data/freeboard_estimation/height_segment_fit_quality_flag_max"; } ancillary_data_freeboard_estimation_b_fr { String units "meters"; String contentType "auxiliaryInformation"; String long_name "b_fr"; String description "Bin size of the freeboard histogram"; String source "Sea Ice ATBD"; String origname "b_fr"; String fullnamepath "/ancillary_data/freeboard_estimation/b_fr"; } 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_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_freeboard_beam_segment_beam_refsurf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface sigma"; String description "Reference surface height sigma (standard devaition) - weighted combination of lead sigmas in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_sigma"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_refsurf_sigma"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_refsurf_alongtrack_slope { Float32 _FillValue 3.402823466e+38; String units "degrees"; String contentType "modelResult"; String long_name "reference surface along track slope"; String description "Reference surface height along track slope"; String source "ATBD section 5"; String origname "beam_refsurf_alongtrack_slope"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_refsurf_alongtrack_slope"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_lead_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first lead"; String description "1-based index to the first /GTx/leads lead used for this beam's reference surface."; String source "Sea Ice ATBD"; String origname "beam_lead_ndx"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_lead_ndx"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard mean swath-segment"; String description "Mean of the Freeboard height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_fb_height"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_height_segments_msw_flag { String units "1"; String contentType "modelResult"; String long_name "multiple scattering warning flag"; String description "Multiple Scattering warning flag. The multiple scattering warning flag (ATL09 parameter msw_flag) has values from -1 to 5 where zero means no multiple scattering and 5 the greatest. If no layers were detected, then msw_flag = 0. If blowing snow is detected and its estimated optical depth is greater than or equal to 0.5, then msw_flag = 5. If the blowing snow optical depth is less than 0.5, then msw_flag = 4. If no blowing snow is detected but there are cloud or aerosol layers detected, the msw_flag assumes values of 1 to 3 based on the height of the bottom of the lowest layer: < 1 km, msw_flag = 3; 1-3 km, msw_flag = 2; > 3km, msw_flag = 1. A value of -1 indicates that the signal to noise of the data was too low to reliably ascertain the presence of cloud or blowing snow. We expect values of -1 to occur only during daylight."; String source "ATL09"; String flag_meanings "cannot_determine no_layers layer_gt_3km layer_between_1_and_3_km layer_lt_1km blow_snow_od_lt_0.5 blow_snow_od_gt_0.5"; Int16 flag_values -1, 0, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "msw_flag"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/msw_flag"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_cloud_flag_atm { String units "1"; String long_name "cloud flag atm"; String contentType "modelResult"; String description "Number of layers found from the backscatter profile using the DDA layer finder"; String source "ATL09"; Int16 valid_min 0; Int16 valid_max 10; String origname "cloud_flag_atm"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/cloud_flag_atm"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_length_seg { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "length of segment"; String description "Along-track length of segment containing n_photons_actual ATL07 length_seg)"; String source "Sea Ice ATBD"; String origname "height_segment_length_seg"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_length_seg"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_ib { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "inverted barometer effect"; String description "Inverted barometer effect calculated from surface pressure"; String source "ATBD section 4.2"; String origname "height_segment_ib"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_ib"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_bsnow_con { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Blowing snow confidence"; String description "Blowing snow confidence"; String source "ATL09"; String origname "bsnow_con"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/bsnow_con"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_layer_flag { String units "1"; String contentType "modelResult"; String long_name "consolidated cloud flag"; String description "This flag is a combination of multiple flags (cloud_flag_atm, cloud_flag_asr, and bsnow_con) and takes daytime/nighttime into consideration. A value of 1 means clouds or blowing snow are likely present. A value of 0 indicates the likely absence of clouds or blowing snow."; String source "ATL09"; String flag_meanings "likely_clear likely_cloudy"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "layer_flag"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/layer_flag"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_backgr_calc { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background count rate calculated"; String description "Calculated background count rate based on sun angle, surface slope, unit reflectance"; String source "ATL07"; String origname "backgr_calc"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/backgr_calc"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_bsnow_h { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Blowing snow top height"; String description "Blowing snow layer top height"; String source "ATL09"; String origname "bsnow_h"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/bsnow_h"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/longitude"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude"; } gt3r_freeboard_beam_segment_height_segments_background_r_norm { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "normalized background (50 shot)"; String description "Background rate normalized to a fixed solar elevation angle"; String source "ATL07"; String origname "background_r_norm"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/background_r_norm"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/latitude"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_ice_conc { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "sea ice concentration"; String description "Sea ice concentration percentage"; String source "ATL07/ANC31"; String origname "ice_conc"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/ice_conc"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_cloud_flag_asr { String units "1"; String contentType "modelResult"; String long_name "cloud flag asr"; String description "Cloud flag (probability) from apparent surface reflectance. 0=clear with high confidence; 1=clear with medium confidence; 2=clear with low confidence; 3=cloudy with low confidence; 4=cloudy with medium confidence; 5=cloudy with high confidence; 6=unknown"; String source "ATL09"; String flag_meanings "clear_with_high_confidence clear_with_medium_confidence clear_with_low_confidence cloudy_with_low_confidence cloudy_with_medium_confidence cloudy_with_high_confidence unknown"; Int16 flag_values 0, 1, 2, 3, 4, 5, 6; Int16 valid_min 0; Int16 valid_max 6; String origname "cloud_flag_asr"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/cloud_flag_asr"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_ssh_flag { String units "1"; String contentType "referenceInformation"; String long_name "Sea Surface Height Flag"; String description "Identifiesthe height segments that are candidates for use as sea surface reference in freeboard calculations in ATL10. The flags are set as follows: 0 = sea ice; 1 = sea surface"; String source "Sea Ice ATBD"; String flag_meanings "sea_ice ice_surface"; Int16 flag_values 0, 1; Int16 valid_min 0; Int16 valid_max 1; String origname "height_segment_ssh_flag"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_ssh_flag"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_surf_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "h surface sigma"; String description "Sigma (standard deviation) estimate of the surface height (ATL07 h_surface_error)"; String source "Sea Ice ATBD"; String origname "height_segment_surf_sigma"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_surf_sigma"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_backgr_r_200 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 200 hz"; String description "Background count rate, averaged over the segment based on ATLAS 50 pulse counts"; String source "ATL09"; String origname "backgr_r_200"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/backgr_r_200"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height of segment surface"; String description "Mean height from along-track segment fit detremined by the sea ice algorithm(ATL07 h_si)"; String source "Sea Ice ATBD"; String origname "height_segment_height"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_height"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_type { String units "1"; String contentType "referenceInformation"; String long_name "Segment surface type"; String description "Value that indicates segment surface type as sea ice or different types of sea surface. 0=cloud covered: rsurf"; String source "ATBD section 4.3"; String flag_meanings "cloud_covered other specular_lead_low_w_bkg specular_lead_low specular_lead_high_w_bkg specular_lead_high dark_lead_smooth_w_bkg dark_lead_smooth dark_lead_rough_w_bkg dark_lead_rough"; Int16 flag_values 0; Int16 valid_min 0; Int16 valid_max 9; String origname "height_segment_type"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_type"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Surface height confidence"; String description "Confidence level in the surface height estimate based on the number of photons; the background noise rate; and the error analysis (ATL07 h_confidence)"; String source "Sea Ice ATBD"; String origname "height_segment_confidence"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_confidence"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_asr_25 { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "Apparent surface reflectance at 25 hz"; String description "Apparent surface reflectance at 25 hz, average to the sea ice segment"; String source "ATL07"; String origname "asr_25"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/asr_25"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_w_gaussian { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "width of best fit gaussian"; String description "Width of best fit gaussian (ATL07 w_gaussian)"; String source "Sea Ice ATBD"; String origname "height_segment_w_gaussian"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_w_gaussian"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_photon_rate { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "modelResult"; String long_name "photon rate"; String description "Photon count rate, averaged over sea ice segment."; String source "ATL07"; String origname "photon_rate"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/photon_rate"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_backgr_r_25 { Float32 _FillValue 3.402823466e+38; String units "hz"; String contentType "modelResult"; String long_name "background rate 25 hz"; String description "Background count rate, averaged over the segment based on 25 hz atmosphere"; String source "ATL09"; String origname "backgr_r_25"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/backgr_r_25"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_height_segments_height_segment_rms { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "height rms"; String description "RMS difference between sea ice modeled and observed photon height distribution(ATL07 h_rms)"; String source "Sea Ice ATBD"; String origname "height_segment_rms"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/height_segment_rms"; String coordinates "gt3r_freeboard_beam_segment_height_segments_delta_time gt3r_freeboard_beam_segment_height_segments_latitude gt3r_freeboard_beam_segment_height_segments_longitude"; } gt3r_freeboard_beam_segment_beam_refsurf_interp_flag { String units "1"; String long_name "reference surface interpolation flag"; String description "Identifies segments with reference surface height filled through interpolation. -1 = no valid refrence surface was determined; 0= refsur computed from leads in this swath; 1 = reference surface inferred from data not in this swath; 2 = previous or next adjacent reference surface was used; 3 = filled based on the the upper height minus an offset"; String source "ATBD section 5"; String flag_meanings "no_surf leads_in_swath inferred neighbor_used upper_height_minus_offset"; Int16 flag_values -1, 0, 1, 2, 3; Int16 valid_min -1; Int16 valid_max 3; String contentType "referenceInformation"; String origname "beam_refsurf_interp_flag"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_refsurf_interp_flag"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of freeboard swath-segment"; String standard_name "longitude"; String description "Center longitude of freeboard swath-segment (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt3r/freeboard_beam_segment/longitude"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude"; } gt3r_freeboard_beam_segment_beam_refsurf_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "reference surface mean"; String description "Reference surface height -weighted combination of leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "beam_refsurf_height"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_refsurf_height"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of freeboard swath-segment"; String standard_name "latitude"; String description "Center latitude of freeboard swath-segment (mean of all freeboard latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt3r/freeboard_beam_segment/latitude"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_height_segment_id { String units "1"; String long_name "Identifier of each height segment"; String description "Identifier of each height segment"; String source "Sea Ice ATBD"; String contentType "referenceInformation"; String origname "height_segment_id"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/height_segment_id"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_beam_fb_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard estimate"; String description "Estimate of the freeboard height based on the beam h reference"; String source "ATBD section 5"; String origname "beam_fb_height"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/beam_fb_height"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_beam_refsur_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to beam refsur"; String description "1-based index to reference surface used for this freeboard height. Its value is identical to the fbswath_ndx. This index also idenifies the swath segment with which the beam freeboard associated."; String source "ATBD section 5"; String origname "beam_refsur_ndx"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/beam_refsur_ndx"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_seg_dist_x { String units "meters"; String contentType "physicalMeasurement"; String long_name "Along Track Distance"; String description "Along-track distance from the equator crossing to the segment center."; String source "Sea Ice ATBD"; String origname "seg_dist_x"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/seg_dist_x"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/longitude"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude"; } gt3r_freeboard_beam_segment_beam_freeboard_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String origname "latitude"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/latitude"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_geoseg_beg { String units "1"; String contentType "referenceInformation"; String long_name "Beginning GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the first photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_beg"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/geoseg_beg"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_beam_fb_confidence { Float32 _FillValue 3.402823466e+38; String units "1"; String contentType "referenceInformation"; String long_name "Freeboard confidence"; String description "Confidence level in the freeboard estimate"; String source "ATBD section 5"; String origname "beam_fb_confidence"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/beam_fb_confidence"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Freeboard sigma estimate"; String description "estimate of the sigma ( standard deviation) for each beam freeboard height"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/beam_fb_sigma"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_geoseg_end { String units "1"; String contentType "referenceInformation"; String long_name "Ending GEOSEG"; String description "Geolocation segment (geoseg) ID associated with the last photon used in this sea ice segment"; String source "Sea Ice ATBD"; String origname "geoseg_end"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/geoseg_end"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_freeboard_beam_fb_quality_flag { String units "1"; String contentType "referenceInformation"; String long_name "Flag describing the quality of the freeboard estimate"; String description "Flag describing the quality of the results of the along-track fit. (-1=height value is invalid; 1=ngrid_w < wlength/2; 2=ngrid_w >= wlength/2; 3=ngrid_dt < dtlength/2; 4=ngrid_dt >= dtlength/2; 5=ngrid_dt >= (dtlength-2): where 1 is best and 5 is poor)."; String source "ATBD section 5"; String flag_meanings "invalid best high med low poor"; Int16 flag_values -1, 1, 2, 3, 4, 5; Int16 valid_min -1; Int16 valid_max 5; String origname "beam_fb_quality_flag"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/beam_fb_quality_flag"; String coordinates "gt3r_freeboard_beam_segment_beam_freeboard_delta_time gt3r_freeboard_beam_segment_beam_freeboard_latitude gt3r_freeboard_beam_segment_beam_freeboard_longitude"; } gt3r_freeboard_beam_segment_beam_fb_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Length ofbeam freeboard swath-segment"; String description "Length of freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_length"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_fb_length"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_fb_hist { String units "1"; String contentType "referenceInformation"; String long_name "Beam freeboard histogram"; String description "Beam Freeboard (using beam fbswath reference surface height) histogram (distribution) for this freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_hist"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_fb_hist"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_dac { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Dynamic Atmosphere Correction"; String description "Dynamic Atmospheric Correction (DAC) includes inverted barometer (IB) effect (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_dac"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_dac"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_tide_pole { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Pole Tide"; String description "Pole Tide -Rotational deformation due to polar motion (-1.5 to 1.5 cm). (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_tide_pole"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_tide_pole"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Longitude"; String standard_name "longitude"; String description "Longitude, WGS84, East=+,Lon of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -180.00000000000000; Float64 valid_max 180.00000000000000; String origname "longitude"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/longitude"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude"; } gt3r_freeboard_beam_segment_geophysical_latitude { String units "degrees_north"; String long_name "Latitude"; String standard_name "latitude"; String description "Latitude, WGS84, North=+, Lat of segment center"; String source "Sea Ice ATBD"; Float64 valid_min -90.000000000000000; Float64 valid_max 90.000000000000000; String contentType "referenceInformation"; String origname "latitude"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/latitude"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_load { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Load Tide"; String description "Load Tide - Local displacement due to Ocean Loading (-6 to 0 cm).(From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_load"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_load"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_geoid { String contentType "referenceInformation"; String long_name "EGM2008 Geoid"; String description "Geoid height above WGS-84 reference ellipsoid (range -107 to 86m), based on the EGM2008 model.(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_geoid"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_geoid"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_ocean { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Ocean Tide"; String description "Ocean Tides including diurnal and semi-diurnal (harmonic analysis), and longer period tides (dynamic and self-consistent equilibrium) (From ATL07)"; String source "Sea Ice ATBD"; String origname "height_segment_ocean"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_ocean"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_mss { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "referenceInformation"; String long_name "Mean Sea Surface"; String description "Mean sea surface height above WGS-84 reference ellipsoid. (From ATL07, includes tide-free geoid and mean dynamic topography"; String source "Sea Ice ATBD"; String origname "height_segment_mss"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_mss"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_geophysical_height_segment_earth { String contentType "referenceInformation"; String long_name "Earth Tide"; String description "Solid Earth Tide(From ATL07)"; String source "Sea Ice ATBD"; Float32 _FillValue 3.402823466e+38; String units "meters"; String origname "height_segment_earth"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/height_segment_earth"; String coordinates "gt3r_freeboard_beam_segment_geophysical_delta_time gt3r_freeboard_beam_segment_geophysical_latitude gt3r_freeboard_beam_segment_geophysical_longitude"; } gt3r_freeboard_beam_segment_fbswath_ndx { String units "1"; String contentType "referenceInformation"; String long_name "Index to freeboard swath segment"; String description "The 1-based fbswath_nx identifies the swath associated with each element. There are the same number of elements in the group /freeboard_swath_segment and in each of the /GTx/freeboard_beam_segment groups. The fbswath_nx identifies the fbswath_refsurf_height used to compute the fbswath_fb_height. It is the same index number that idenitifies the beam_refsurf_height to its swath and the beam_refsurf_height used to computed the beam_fb_height."; String source "ATBD section 5"; String origname "fbswath_ndx"; String fullnamepath "/gt3r/freeboard_beam_segment/fbswath_ndx"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_fb_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Beam Freeboard standard deviation swath-segment"; String description "Freeboard standard deviation of the height-segments in freeboard beam-segment"; String source "ATBD section 5"; String origname "beam_fb_sigma"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_fb_sigma"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_freeboard_beam_segment_beam_lead_n { String units "1"; String contentType "referenceInformation"; String long_name "Number of leads"; String description "Number of leads used for this beam reference surface"; String source "Sea Ice ATBD"; String origname "beam_lead_n"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_lead_n"; String coordinates "gt3r_freeboard_beam_segment_delta_time gt3r_freeboard_beam_segment_latitude gt3r_freeboard_beam_segment_longitude"; } gt3r_leads_lead_height { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead height"; String description "Lead height - weighted mean of consective sea surface heights used for this lead"; String source "ATBD section 5"; String origname "lead_height"; String fullnamepath "/gt3r/leads/lead_height"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude gt3r_leads_longitude"; } gt3r_leads_lead_length { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead size"; String description "Along-track length of this lead"; String source "ATBD section 5"; String origname "lead_length"; String fullnamepath "/gt3r/leads/lead_length"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude gt3r_leads_longitude"; } gt3r_leads_lead_sigma { Float32 _FillValue 3.402823466e+38; String units "meters"; String contentType "modelResult"; String long_name "Lead sigma estimate"; String description "Lead height sigma (standard deviation) estimate - weighted combination of sea surface height sigmas used as leads in this beam for this swath segment"; String source "ATBD section 5"; String origname "lead_sigma"; String fullnamepath "/gt3r/leads/lead_sigma"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude gt3r_leads_longitude"; } gt3r_leads_longitude { String units "degrees_east"; String contentType "referenceInformation"; String long_name "Center longitude of lead"; String standard_name "longitude"; String description "Center longitude of lead (mean of all freeboard longitudes)"; String source "ATBD section 5"; String origname "longitude"; String fullnamepath "/gt3r/leads/longitude"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude"; } gt3r_leads_latitude { String units "degrees_north"; String contentType "referenceInformation"; String long_name "Center latitude of lead"; String standard_name "latitude"; String description "Center latitude of lead (mean of all sea surface height latitudes)"; String source "ATBD section 5"; String origname "latitude"; String fullnamepath "/gt3r/leads/latitude"; String coordinates "gt3r_leads_delta_time gt3r_leads_longitude"; } gt3r_leads_ssh_n { String units "1"; String contentType "referenceInformation"; String long_name "number of sea surface references"; String description "Number of sea surface height segments used for this lead"; String source "ATBD section 5"; String origname "ssh_n"; String fullnamepath "/gt3r/leads/ssh_n"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude gt3r_leads_longitude"; } gt3r_leads_ssh_ndx { String units "1"; String contentType "referenceInformation"; String long_name "index first sea surface"; String description "1-based index to the first freeboard element (i.e.first sea surface height segment) used for this lead"; String source "Sea Ice ATBD"; String origname "ssh_ndx"; String fullnamepath "/gt3r/leads/ssh_ndx"; String coordinates "gt3r_leads_delta_time gt3r_leads_latitude gt3r_leads_longitude"; } freeboard_swath_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "GPS elapsed time"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/delta_time"; } freeboard_swath_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/freeboard_swath_segment/ds_si_hist_bins"; } freeboard_swath_segment_gt1l_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt1l/swath_freeboard/delta_time"; } freeboard_swath_segment_gt1r_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt1r/swath_freeboard/delta_time"; } freeboard_swath_segment_gt2l_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt2l/swath_freeboard/delta_time"; } freeboard_swath_segment_gt2r_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt2r/swath_freeboard/delta_time"; } freeboard_swath_segment_gt3l_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt3l/swath_freeboard/delta_time"; } freeboard_swath_segment_gt3r_swath_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/freeboard_swath_segment/gt3r/swath_freeboard/delta_time"; } gt1l_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1l/freeboard_beam_segment/beam_freeboard/delta_time"; } gt1l_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1l/freeboard_beam_segment/delta_time"; } gt1l_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt1l/freeboard_beam_segment/ds_si_hist_bins"; } gt1l_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1l/freeboard_beam_segment/geophysical/delta_time"; } gt1l_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1l/freeboard_beam_segment/height_segments/delta_time"; } gt1l_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1l/leads/delta_time"; } gt1r_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1r/freeboard_beam_segment/beam_freeboard/delta_time"; } gt1r_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1r/freeboard_beam_segment/delta_time"; } gt1r_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt1r/freeboard_beam_segment/ds_si_hist_bins"; } gt1r_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1r/freeboard_beam_segment/geophysical/delta_time"; } gt1r_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1r/freeboard_beam_segment/height_segments/delta_time"; } gt1r_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt1r/leads/delta_time"; } gt2l_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2l/freeboard_beam_segment/beam_freeboard/delta_time"; } gt2l_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2l/freeboard_beam_segment/delta_time"; } gt2l_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt2l/freeboard_beam_segment/ds_si_hist_bins"; } gt2l_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2l/freeboard_beam_segment/geophysical/delta_time"; } gt2l_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2l/freeboard_beam_segment/height_segments/delta_time"; } gt2l_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2l/leads/delta_time"; } gt2r_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2r/freeboard_beam_segment/beam_freeboard/delta_time"; } gt2r_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2r/freeboard_beam_segment/delta_time"; } gt2r_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt2r/freeboard_beam_segment/ds_si_hist_bins"; } gt2r_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2r/freeboard_beam_segment/geophysical/delta_time"; } gt2r_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2r/freeboard_beam_segment/height_segments/delta_time"; } gt2r_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt2r/leads/delta_time"; } gt3l_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3l/freeboard_beam_segment/beam_freeboard/delta_time"; } gt3l_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3l/freeboard_beam_segment/delta_time"; } gt3l_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt3l/freeboard_beam_segment/ds_si_hist_bins"; } gt3l_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3l/freeboard_beam_segment/geophysical/delta_time"; } gt3l_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3l/freeboard_beam_segment/height_segments/delta_time"; } gt3l_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3l/leads/delta_time"; } gt3r_freeboard_beam_segment_beam_freeboard_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3r/freeboard_beam_segment/beam_freeboard/delta_time"; } gt3r_freeboard_beam_segment_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "The center time assigned to this freeboard swath segment (mean of all freeboard times), in elapsed GPS seconds since the ATLAS SDP GPS 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 "ATBD section 5"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3r/freeboard_beam_segment/delta_time"; } gt3r_freeboard_beam_segment_ds_si_hist_bins { String units "1"; String contentType "auxiliaryInformation"; String long_name "Sea Ice Histogram Bins Dimension Scale"; String description "Dimension scale indexing the sea ice histogram bins. The bin heights must be computed from information contained within the same group as the histogram."; String source "SeaIce ATBD"; String origname "ds_si_hist_bins"; String fullnamepath "/gt3r/freeboard_beam_segment/ds_si_hist_bins"; } gt3r_freeboard_beam_segment_geophysical_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3r/freeboard_beam_segment/geophysical/delta_time"; } gt3r_freeboard_beam_segment_height_segments_delta_time { String units "seconds since 2018-01-01"; String contentType "referenceInformation"; String long_name "Elapsed GPS seconds"; 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3r/freeboard_beam_segment/height_segments/delta_time"; } gt3r_leads_delta_time { String units "seconds since 2018-01-01"; String contentType "physicalMeasurement"; String long_name "Elapsed GPS seconds"; String standard_name "time"; String description "Center time of the lead in seconds since the ATLAS SDP GPS 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 "Derived via Time Tagging"; String coordinates "latitude longitude"; String origname "delta_time"; String fullnamepath "/gt3r/leads/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"; } DODS_EXTRA { String Unlimited_Dimension "freeboard_swath_segment_delta_time", "freeboard_swath_segment_ds_si_hist_bins", "freeboard_swath_segment_gt1l_swath_freeboard_delta_time", "freeboard_swath_segment_gt1r_swath_freeboard_delta_time", "freeboard_swath_segment_gt2l_swath_freeboard_delta_time", "freeboard_swath_segment_gt2r_swath_freeboard_delta_time", "freeboard_swath_segment_gt3l_swath_freeboard_delta_time", "freeboard_swath_segment_gt3r_swath_freeboard_delta_time", "gt1l_freeboard_beam_segment_beam_freeboard_delta_time", "gt1l_freeboard_beam_segment_delta_time", "gt1l_freeboard_beam_segment_ds_si_hist_bins", "gt1l_freeboard_beam_segment_geophysical_delta_time", "gt1l_freeboard_beam_segment_height_segments_delta_time", "gt1l_leads_delta_time", "gt1r_freeboard_beam_segment_beam_freeboard_delta_time", "gt1r_freeboard_beam_segment_delta_time", "gt1r_freeboard_beam_segment_ds_si_hist_bins", "gt1r_freeboard_beam_segment_geophysical_delta_time", "gt1r_freeboard_beam_segment_height_segments_delta_time", "gt1r_leads_delta_time", "gt2l_freeboard_beam_segment_beam_freeboard_delta_time", "gt2l_freeboard_beam_segment_delta_time", "gt2l_freeboard_beam_segment_ds_si_hist_bins", "gt2l_freeboard_beam_segment_geophysical_delta_time", "gt2l_freeboard_beam_segment_height_segments_delta_time", "gt2l_leads_delta_time", "gt2r_freeboard_beam_segment_beam_freeboard_delta_time", "gt2r_freeboard_beam_segment_delta_time", "gt2r_freeboard_beam_segment_ds_si_hist_bins", "gt2r_freeboard_beam_segment_geophysical_delta_time", "gt2r_freeboard_beam_segment_height_segments_delta_time", "gt2r_leads_delta_time", "gt3l_freeboard_beam_segment_beam_freeboard_delta_time", "gt3l_freeboard_beam_segment_delta_time", "gt3l_freeboard_beam_segment_ds_si_hist_bins", "gt3l_freeboard_beam_segment_geophysical_delta_time", "gt3l_freeboard_beam_segment_height_segments_delta_time", "gt3l_leads_delta_time", "gt3r_freeboard_beam_segment_beam_freeboard_delta_time", "gt3r_freeboard_beam_segment_delta_time", "gt3r_freeboard_beam_segment_ds_si_hist_bins", "gt3r_freeboard_beam_segment_geophysical_delta_time", "gt3r_freeboard_beam_segment_height_segments_delta_time", "gt3r_leads_delta_time", "orbit_info_crossing_time", "orbit_info_sc_orient_time"; } }