DAP4 Data Request Form ATL11_051911_0328_007_01.h5

dataset: ATL11_051911_0328_007_01.h5
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    • short_name: ATL11 (Type is String)
    • Conventions: CF-1.6 (Type is String)
    • contributor_name: Thomas A Neumann (thomas.neumann@nasa.gov), Thorsten Markus (thorsten.markus@nasa.gov), Suneel Bhardwaj (suneel.bhardwaj@nasa.gov) David W Hancock III (david.w.hancock@nasa.gov) (Type is String)
    • date_created: 2025-09-22T17:29:20.169101Z (Type is String)
    • contributor_role: Instrument Engineer, Investigator, Principle Investigator, Data Producer, Data Producer (Type is String)
    • date_type: UTC (Type is String)
    • featureType: trajectory (Type is String)
    • geospatial_lat_max: -78.994011517244402 (Type is Float64)
    • geospatial_lat_min: -88.037139860977035 (Type is Float64)
    • geospatial_lat_units: degrees_north (Type is String)
    • geospatial_lon_max: 157.91700093027168 (Type is Float64)
    • geospatial_lon_min: -3.1996215593138118 (Type is Float64)
    • geospatial_lon_units: degrees_east (Type is String)
    • granule_type: ATL11 (Type is String)
    • hdfversion: HDF5 1.14.4 (Type is String)
    • history: 2025-09-22T17:29:20.171089Z (Type is String)
    • identifier_file_uuid: d21ba820-2fe0-32f9-876d-e345fd646ef0 (Type is String)
    • identifier_product_doi_authority: http://dx.doi.org (Type is String)
    • identifier_product_format_version: 3.0 (Type is String)
    • level: L3B (Type is String)
    • license: Data may not be reproduced or distributed without including the citation for this product included in this metadata. Data may not be distributed in an altered form without the written permission of the ICESat-2 Science Project Office at NASA/GSFC. (Type is String)
    • naming_authority: http://dx.doi.org (Type is String)
    • spatial_coverage_type: Horizontal (Type is String)
    • standard_name_vocabulary: CF-1.6 (Type is String)
    • time_coverage_start: 2019-03-29T08:39:11.000000Z (Type is String)
    • time_type: CCSDS UTC-A (Type is String)
    • time_coverage_duration: 191254180.57086730 (Type is Float64)
    • time_coverage_end: 2025-04-19T22:48:44.000000Z (Type is String)
    • publisher_email: nsidc@nsidc.org (Type is String)
    • publisher_url: http://nsidc.org/daac/ (Type is String)
    • identifier_product_type: ATL11 (Type is String)
    • title: ATLAS/ICESat-2 L3B Slope-Corrected Land Ice Height Time Series (Type is String)
    • platform: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
    • publisher_name: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String)
    • identifier_product_doi: doi:10.5067/ATLAS/ATL11.007 (Type is String)
    • institution: National Aeronautics and Space Administration (NASA) (Type is String)
    • creator_name: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String)
    • description: This data set provides time series of land-ice surface heights derived from the ICESat-2 ATL06 Land Ice Height product. It is a spatially organized product that allows easy access to height-change information derived from ICESat-2 observations. (Type is String)
    • summary: The purpose of ATL11 is to provide an ICESat-2 satellite cycle summary of heights and height changes of land-based ice and will be provided as input to ATL14 and ATL15, gridded estimates of heights and height-changes. (Type is String)
    • keywords: EARTH SCIENCE > CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION > NONE > NONE > NONE (Type is String)
    • keywords_vocabulary: NASA/GCMD Science Keywords (Type is String)
    • citation: Cite these data in publications as follows: The data used in this study were produced by the ICESat-2 Science Project Office at NASA/GSFC. The data archive site is the NASA National Snow and Ice Data Center Distributed Active Archive Center. (Type is String)
    • processing_level: 3B (Type is String)
    • references: http://nsidc.org/data/icesat2/data.html (Type is String)
    • source: Spacecraft (Type is String)
    • project: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
    • instrument: ATLAS > Advanced Topographic Laser Altimeter System (Type is String)
      • METADATA
        • Description: ISO19115 Structured Metadata Represented within HDF5 (Type is String)
        • fullnamepath: /METADATA (Type is String)
    • METADATA_AcquisitionInformation: (Type is Container)
      • METADATA_AcquisitionInformation_lidar
        • pulse_rate: 10000 pps (Type is String)
        • wavelength: 532 nm (Type is String)
        • identifier: ATLAS (Type is String)
        • type: Laser Altimeter (Type is String)
        • description: ATLAS on ICESat-2 determines the range between the satellite and the Earth's surface by measuring the two-way time delay of short pulses of laser light that it transmits in six beams. It is different from previous operational ice-sheet altimeters in that it is a photon-counting LIDAR. ATLAS records a set of arrival times for individual photons, which are then analyzed to derive surface, vegetation, and cloud properties. ATLAS has six beams arranged in three pairs, so that it samples each of three reference pair tracks with a pair of beams; ATLAS transmits pulses at 10 kHz, giving approximately one pulse every 0.7 m along track; ATLAS's expected pointing control will be better than 90 m RMS. (Type is String)
        • fullnamepath: /METADATA/AcquisitionInformation/lidar (Type is String)
      • METADATA_AcquisitionInformation_lidarDocument
        • edition: Pre-Release (Type is String)
        • publicationDate: 12/31/17 (Type is String)
        • title: A document describing the ATLAS instrument will be provided by the ICESat-2 Project Science Office. (Type is String)
        • fullnamepath: /METADATA/AcquisitionInformation/lidarDocument (Type is String)
      • METADATA_AcquisitionInformation_platform
        • identifier: ICESat-2 (Type is String)
        • description: Ice, Cloud, and land Elevation Satellite-2 (Type is String)
        • type: Spacecraft (Type is String)
        • fullnamepath: /METADATA/AcquisitionInformation/platform (Type is String)
      • METADATA_AcquisitionInformation_platformDocument
        • edition: 31-Dec-16 (Type is String)
        • publicationDate: 31-Dec-16 (Type is String)
        • title: The Ice, Cloud, and land Elevation Satellite-2 (ICESat-2): Science requirements, concept, and implementation. Thorsten Markus, Tom Neumann, Anthony Martino, Waleed Abdalati, Kelly Brunt, Beata Csatho, Sinead Farrell, Helen Fricker, Alex Gardner, David Harding, Michael Jasinski, Ron Kwok, Lori Magruder, Dan Lubin, Scott Luthcke, James Morison, Ross Nelson, Amy Neuenschwander, Stephen Palm, Sorin Popescu, CK Shum, Bob E. Schutz, Benjamin Smith, Yuekui Yang, Jay Zwally. http://dx.doi.org/10.1016/j.rse.2016.12.029 (Type is String)
        • fullnamepath: /METADATA/AcquisitionInformation/platformDocument (Type is String)
      • METADATA_DataQuality
        • scope: NOT_SET (Type is String)
        • fullnamepath: /METADATA/DataQuality (Type is String)
      • METADATA_DataQuality_CompletenessOmission
        • evaluationMethodType: directInternal (Type is String)
        • measureDescription: TBD (Type is String)
        • nameOfMeasure: TBD (Type is String)
        • unitofMeasure: TBD (Type is String)
        • value: NOT_SET (Type is String)
        • fullnamepath: /METADATA/DataQuality/CompletenessOmission (Type is String)
      • METADATA_DataQuality_DomainConsistency
        • evaluationMethodType: directInternal (Type is String)
        • measureDescription: TBD (Type is String)
        • nameOfMeasure: TBD (Type is String)
        • unitofMeasure: TBD (Type is String)
        • value: NOT_SET (Type is String)
        • fullnamepath: /METADATA/DataQuality/DomainConsistency (Type is String)
      • METADATA_ProductSpecificationDocument
        • ShortName: ATL11_SDP (Type is String)
        • characterSet: utf8 (Type is String)
        • edition: v4.3 (Type is String)
        • language: eng (Type is String)
        • publicationDate: Feb 2020 (Type is String)
        • title: ICESat-2-SIPS-SPEC-4260 - ATLAS Science Algorithm Standard Data Product (SDP) Volume 5 (ATL06). (Type is String)
        • fullnamepath: /METADATA/ProductSpecificationDocument (Type is String)
      • METADATA_SeriesIdentification
        • maintenanceAndUpdateFrequency: asNeeded (Type is String)
        • maintenanceDate: SET_BY_META (Type is String)
        • VersionID: 3.0 (Type is String)
        • language: eng (Type is String)
        • characterSet: utf8 (Type is String)
        • pointOfContact: NSIDC DAAC > NASA National Snow and Ice Data Center Distributed Active Archive Center (Type is String)
        • longName: ATLAS/ICESat-2 L3B Slope-Corrected Land Ice Height Time Series (Type is String)
        • shortName: ATL11 (Type is String)
        • identifier_product_DOI: doi:10.5067/ATLAS/ATL11.007 (Type is String)
        • revisionDate: 2023-05-31 (Type is String)
        • resourceProviderOrganizationName: National Aeronautics and Space Administration (NASA) (Type is String)
        • abstract: This data set provides time series of land-ice surface heights derived from the ICESat-2 ATL06 Land Ice Height product. It is a spatially organized product that allows easy access to height-change information derived from ICESat-2 observations. (Type is String)
        • purpose: The purpose of ATL11 is to provide an ICESat-2 satellite cycle summary of heights and height changes of land-based ice and will be provided as input to ATL14 and ATL15, gridded estimates of heights and height-changes. (Type is String)
        • credit: The software that generates the ATL11 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String)
        • status: onGoing (Type is String)
        • format: HDF (Type is String)
        • formatVersion: 5 (Type is String)
        • topicCategory: geoscientificInformation (Type is String)
        • mission: ICESat-2 > Ice, Cloud, and land Elevation Satellite-2 (Type is String)
        • fullnamepath: /METADATA/SeriesIdentification (Type is String)
      • METADATA_DatasetIdentification
        • spatialRepresentationType: along-track (Type is String)
        • fileName: ATL11_051911_0328_007_01.h5 (Type is String)
        • uuid: 001be65d-b38b-4ec8-85f8-d8900912aa53 (Type is String)
        • VersionID: 007 (Type is String)
        • creationDate: 2025-09-22T17:29:20.171089Z (Type is String)
        • language: eng (Type is String)
        • characterSet: utf8 (Type is String)
        • shortName: ATL11 (Type is String)
        • originatorOrganizationName: GSFC I-SIPS > ICESat-2 Science Investigator-led Processing System (Type is String)
        • abstract: This data set provides time series of land-ice surface heights derived from the ICESat-2 ATL06 Land Ice Height product. It is a spatially organized product that allows easy access to height-change information derived from ICESat-2 observations. (Type is String)
        • purpose: The purpose of ATL11 is to provide an ICESat-2 satellite cycle summary of heights and height changes of land-based ice and will be provided as input to ATL14 and ATL15, gridded estimates of heights and height-changes. (Type is String)
        • credit: The software that generates the ATL11 product was designed and implemented within the ICESat-2 Science Investigator-led Processing System at the NASA Goddard Space Flight Center in Greenbelt, Maryland. (Type is String)
        • status: onGoing (Type is String)
        • topicCategory: geoscientificInformation (Type is String)
        • fullnamepath: /METADATA/DatasetIdentification (Type is String)
      • METADATA_Extent
        • northBoundLatitude: -78.994011517244402 (Type is Float64)
        • eastBoundLongitude: 157.91700093027168 (Type is Float64)
        • southBoundLatitude: -88.037139860977035 (Type is Float64)
        • westBoundLongitude: -3.1996215593138118 (Type is Float64)
        • rangeBeginningDateTime: 2019-03-29T08:39:11.000000Z (Type is String)
        • rangeEndingDateTime: 2025-04-19T22:48:51.570867Z (Type is String)
        • fullnamepath: /METADATA/Extent (Type is String)
      • METADATA_QADatasetIdentification
        • abstract: An ASCII product that contains statistical information on data product results. These statistics enable data producers and users to assess the quality of the data in the data product granule (Type is String)
        • creationDate: 2025-09-22T21:29:51.000000Z (Type is String)
        • fileName: ATL11_051911_0328_007_01.h5.qa (Type is String)
        • fullnamepath: /METADATA/QADatasetIdentification (Type is String)
    • METADATA_Lineage: (Type is Container)
      • METADATA_Lineage_ANC36_11
        • fileName: DsESDTAtATL11.001.series.xml (Type is String)
        • shortName: ANC36-11 (Type is String)
        • uuid: 5BFCCB48-D68E-4897-92C6-389DE6A1C32B (Type is String)
        • version: 001 (Type is String)
        • fullnamepath: /METADATA/Lineage/ANC36-11 (Type is String)
      • METADATA_Lineage_ANC38_11
        • fileName: DsESDTAtATL11.001.dataset.xml (Type is String)
        • shortName: ANC38-11 (Type is String)
        • uuid: 95BF65A6-F1E7-445E-9E94-ADD030917038 (Type is String)
        • version: 001 (Type is String)
        • fullnamepath: /METADATA/Lineage/ANC38-11 (Type is String)
      • METADATA_Lineage_ATL06
        • description: ICESat-2 ATLAS Land Ice (Type is String)
        • fileName: ATL06_20190502064932_05190311_007_01.h5, ATL06_20190801022913_05190411_007_01.h5, ATL06_20191030220909_05190511_007_01.h5, ATL06_20200129174854_05190611_007_01.h5, ATL06_20200429132840_05190711_007_01.h5, ATL06_20200729090828_05190811_007_01.h5, ATL06_20201028044815_05190911_007_01.h5, ATL06_20210127002810_05191011_007_01.h5, ATL06_20210427200759_05191111_007_01.h5, ATL06_20210727154752_05191211_007_01.h5, ATL06_20211026112750_05191311_007_01.h5, ATL06_20220125070742_05191411_007_01.h5, ATL06_20220426024733_05191511_007_01.h5, ATL06_20220725222735_05191611_007_01.h5, ATL06_20221024180719_05191711_007_01.h5, ATL06_20230123134701_05191811_007_01.h5, ATL06_20230424092649_05191911_007_01.h5, ATL06_20230724050601_05192011_007_01.h5, ATL06_20231023004536_05192111_007_01.h5, ATL06_20240121202505_05192211_007_01.h5, ATL06_20240421160429_05192311_007_01.h5, ATL06_20240721114420_05192411_007_01.h5, ATL06_20241020072408_05192511_007_01.h5, ATL06_20250119030337_05192611_007_01.h5, ATL06_20250419224301_05192711_007_01.h5 (Type is String)
        • shortName: ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06, ATL06 (Type is String)
        • start_orbit: 3494, 4881, 6268, 7655, 9042, 10429, 11816, 13203, 14590, 15977, 17364, 18751, 20138, 21525, 22912, 24299, 25686, 27073, 28460, 29847, 31234, 32621, 34008, 35395, 36782 (Type is Int32)
        • end_orbit: 3494, 4881, 6268, 7655, 9042, 10429, 11816, 13203, 14590, 15977, 17364, 18751, 20138, 21525, 22912, 24299, 25686, 27073, 28460, 29847, 31234, 32621, 34008, 35395, 36782 (Type is Int32)
        • start_cycle: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 (Type is Int32)
        • end_cycle: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27 (Type is Int32)
        • start_rgt: 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519 (Type is Int32)
        • end_rgt: 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519, 519 (Type is Int32)
        • start_region: 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 (Type is Int32)
        • end_region: 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11 (Type is Int32)
        • start_geoseg: 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588, 1443588 (Type is Int32)
        • end_geoseg: 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334, 1565334 (Type is Int32)
        • uuid: d21ba820-2fe0-32f9-876d-e345fd646ef0, 14de28aa-bcc7-352a-827b-088791e1c7bd, 7dd21ede-9e87-3796-abb2-f43919ede536, 3029a40a-fe75-3fac-9980-7e828ffcfc20, cca07f9a-2189-31c7-b190-f0c49f2efefe, 327afdc4-cb46-3bff-af1d-66e46a4d8389, 45bb5642-4f54-3161-a7e2-1beaa068734c, e8080f75-0665-38d1-b4e9-1e94205b4a35, f228e68a-05f2-393d-aaa9-e0f04ac5abd4, f4e38bce-b052-3527-93cd-00d22214c5f6, 221c73f4-253d-391c-9f93-7cbf901b7695, b5a91645-2ce7-37b1-a6ae-f027c77c207a, 25e9d01c-1de1-3789-8a99-8bef835ff7dd, 5d58ab44-bb2f-3afd-99ea-d437e6129b9c, a4587ef4-e307-37fe-90d7-533526a97680, 4d511bc3-4161-31d3-9f06-a1490003e25e, 948e30c0-9838-3e6e-8ccb-c4141657e024, 12cd9b57-d14b-3208-9cfc-c0a2c41278e6, 5cd6b1aa-c537-3b3b-bc00-c99210387efd, 5d296ef6-0434-3ebb-8db1-3d0ac1c28d82, 9fde3810-a06f-3f31-84ec-11a465ce8299, e341ee99-3989-331b-8d9c-db38957b3880, 46bbdb6f-eceb-3e44-b347-0ce6aab0098d, 688ddf14-f5b0-364d-870e-01c868245b88, 944e7cf1-0273-3cd8-a0e8-d743aa762c0e (Type is String)
        • version: 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01, 01 (Type is String)
        • fullnamepath: /METADATA/Lineage/ATL06 (Type is String)
      • METADATA_Lineage_Control
        • description: Exact command line execution of ICESat-2/ATL11 algorithm providing all of the conditions required for each individual run of the software. (Type is String)
        • shortName: CNTL (Type is String)
        • version: 1 (Type is String)
        • control: /gpfsm/dnb34/bjelley/miniforge3/envs/ATL11/bin/ATL06_to_ATL11.py 519 11 --cycles 3 28 -d /discover/nobackup/bjelley/ATL06_copy/Antarctic/007/cycle_*/ -R 7 -V 1 -o /discover/nobackup/bjelley/ATL11_processing/Antarctic_007_cycle_03_28_v01/007 -H -1 --tile_dir_glob /discover/nobackup/projects/tse-icesat2/tiles/Antarctic/007/cycle_* --xy_bias_file /gpfsm/dnb34/bjelley/python/ATL11/ATL11/package_data/xy_biases_rel007_c1_28_plateau__0_800km_3day_2025-09-12.csv --sec_offset 31151 --start_date 2019 03 29 --scratch --xover_output_dir /discover/nobackup/bjelley/ATL11_processing/Antarctic_007_cycle_03_28_v01/xover --verbose (Type is String)
        • fullnamepath: /METADATA/Lineage/Control (Type is String)
    • METADATA_ProcessStep: (Type is Container)
      • METADATA_ProcessStep_Browse
        • identifier: SET_BY_PGE (Type is 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. (Type is String)
        • runTimeParameters: SET_BY_PGE (Type is String)
        • softwareDate: SET_BY_PGE (Type is String)
        • softwareTitle: SET_BY_PGE (Type is String)
        • softwareVersion: SET_BY_PGE (Type is String)
        • stepDateTime: SET_BY_PGE (Type is String)
        • fullnamepath: /METADATA/ProcessStep/Browse (Type is String)
      • METADATA_ProcessStep_Metadata
        • processDescription: Metadata information is processed by the metadata utility for each granule produced by SIPS. During PGE processing, dynamic metadata are written to the product. Additional static information is provided with the metadata template. The metadata utility reads ISO Dataset and Series metadata files and updates the product with static information from within those files. The utility then merges the static and dynamic metadata to creates output ISO19139 Dataset and Series XML files. Finally the utility reads the ISO19139 Dataset and Series XML files into memory and stores the textual representations as attributes attached to the /METADATA group. (Type is String)
        • identifier: atlas_meta (Type is String)
        • softwareVersion: Version 5.1.3 (Type is String)
        • softwareDate: Sep 3 2025 (Type is String)
        • softwareTitle: Creates ATLAS XML metadata files (Type is String)
        • runTimeParameters: ATL11_051911_0328_007_01.h5.ctl (Type is String)
        • stepDateTime: 2025-09-22T21:29:21.000000Z (Type is String)
        • fullnamepath: /METADATA/ProcessStep/Metadata (Type is String)
      • METADATA_ProcessStep_PGE
        • ATBDDate: 12/04/2019 (Type is String)
        • ATBDTitle: Algorithm Theoretical Basis Document (ATBD) For Land-Ice Along-Track Products Part 2: Land-ice H(t)/ATL11 (Type is String)
        • ATBDVersion: N/A (Type is String)
        • documentDate: Feb 2020 (Type is String)
        • documentation: ATLAS Science Algorithm Software Design Description (SDD) - Volume 9 (atlas_l3a_is) (Type is String)
        • processDescription: Computes surface heights for each beam, along and across-track slopes calculated for beam pairs. (Type is String)
        • runTimeParameters: /gpfsm/dnb34/bjelley/miniforge3/envs/ATL11/bin/ATL06_to_ATL11.py 519 11 --cycles 3 28 -d /discover/nobackup/bjelley/ATL06_copy/Antarctic/007/cycle_*/ -R 7 -V 1 -o /discover/nobackup/bjelley/ATL11_processing/Antarctic_007_cycle_03_28_v01/007 -H -1 --tile_dir_glob /discover/nobackup/projects/tse-icesat2/tiles/Antarctic/007/cycle_* --xy_bias_file /gpfsm/dnb34/bjelley/python/ATL11/ATL11/package_data/xy_biases_rel007_c1_28_plateau__0_800km_3day_2025-09-12.csv --sec_offset 31151 --start_date 2019 03 29 --scratch --xover_output_dir /discover/nobackup/bjelley/ATL11_processing/Antarctic_007_cycle_03_28_v01/xover --verbose (Type is String)
        • identifier: atlas_l3b_is (Type is String)
        • softwareDate: September 01 2025 (Type is String)
        • softwareTitle: ASAS L3B Land Ice PGE (Type is String)
        • stepDateTime: 2025-09-22T17:29:20.171089Z (Type is String)
        • softwareVersion: 3.0 (Type is String)
        • fullnamepath: /METADATA/ProcessStep/PGE (Type is String)
      • METADATA_ProcessStep_QA
        • processDescription: QA processing is performed by an external utility on each granule produced by SIPS. The utility reads the granule, performs both generic and product-specific quality-assessment calculations, and writes a text-based quality assessment report. The name and creation data of this report are identified within the QADatasetIdentification metadata (Type is String)
        • identifier: atl11_qa_util (Type is String)
        • softwareVersion: Version 2.1 (Type is String)
        • softwareDate: Sep 3 2025 (Type is String)
        • softwareTitle: ATL11 QA Utility (Type is String)
        • runTimeParameters: ATL11_051911_0328_007_01.h5.ctl (Type is String)
        • stepDateTime: 2025-09-22T21:29:51.000000Z (Type is String)
        • fullnamepath: /METADATA/ProcessStep/QA (Type is String)
      • ancillary_data
        • data_rate: Data within this group pertain to the granule in its entirety. (Type is String)
        • description: Contains information ancillary to the data product. This may include product characteristics, instrument characteristics and/or processing constants. (Type is String)
        • fullnamepath: /ancillary_data (Type is String)
      • orbit_info
        • description: Contains orbit information. (Type is String)
        • fullnamepath: /orbit_info (Type is String)
      • pt1
        • beam_pair: 1 (Type is Int64)
        • ReferenceGroundTrack: 519 (Type is Int64)
        • first_cycle: 3 (Type is Int64)
        • last_cycle: 28 (Type is Int64)
        • description: data for pair track %pair_track% (Type is String)
        • L_search_AT: 60 (Type is Int64)
        • L_search_XT: 65 (Type is Int64)
        • seg_sigma_threshold_min: 0.050000000000000003 (Type is Float64)
        • beam_spacing: 90 (Type is Int64)
        • seg_atc_spacing: 100 (Type is Int64)
        • N_search: 3.0000000000000000 (Type is Float64)
        • poly_max_degree_AT: 3 (Type is Int64)
        • poly_max_degree_XT: 2 (Type is Int64)
        • xy_scale: 100.00000000000000 (Type is Float64)
        • t_scale: 31557600.000000000 (Type is Float64)
        • max_fit_iterations: 20 (Type is Int64)
        • equatorial_radius: 6378137 (Type is Int64)
        • polar_radius: 6356752.2999999998 (Type is Float64)
        • seg_number_skip: 3.0000000000000000 (Type is Float64)
        • pair_yatc_ctr_tol: 1000 (Type is Int64)
        • min_valid_h: -460 (Type is Int64)
        • max_valid_h: 8400 (Type is Int64)
        • N_coeffs: 8 (Type is Int64)
        • ATL06_xover_field_list: delta_time, h_li, h_li_sigma, latitude, longitude, atl06_quality_summary, segment_id, x_atc, y_atc, dh_fit_dx, rgt, cycle_number, BP, LR, ref_azimuth, ref_coelv, seg_azimuth, spot, sigma_geo_xt, sigma_geo_at, sigma_geo_h, dac, tide_ocean (Type is String)
        • N_poly_coeffs: 8 (Type is Int64)
        • fullnamepath: /pt1 (Type is String)
      • pt1_cycle_stats
        • description: Parameters describing the input data for each cycle at each reference point (Type is String)
        • fullnamepath: /pt1/cycle_stats (Type is String)
      • pt1_ref_surf
        • description: Parameters describing the reference surface at each reference point (Type is String)
        • poly_exponent_x: 1, 0, 2, 1, 0, 3, 2, 1 (Type is Int64)
        • poly_exponent_y: 0, 1, 0, 1, 2, 0, 1, 2 (Type is Int64)
        • fullnamepath: /pt1/ref_surf (Type is String)
      • pt2
        • beam_pair: 2 (Type is Int64)
        • ReferenceGroundTrack: 519 (Type is Int64)
        • first_cycle: 3 (Type is Int64)
        • last_cycle: 28 (Type is Int64)
        • description: data for pair track %pair_track% (Type is String)
        • L_search_AT: 60 (Type is Int64)
        • L_search_XT: 65 (Type is Int64)
        • seg_sigma_threshold_min: 0.050000000000000003 (Type is Float64)
        • beam_spacing: 90 (Type is Int64)
        • seg_atc_spacing: 100 (Type is Int64)
        • N_search: 3.0000000000000000 (Type is Float64)
        • poly_max_degree_AT: 3 (Type is Int64)
        • poly_max_degree_XT: 2 (Type is Int64)
        • xy_scale: 100.00000000000000 (Type is Float64)
        • t_scale: 31557600.000000000 (Type is Float64)
        • max_fit_iterations: 20 (Type is Int64)
        • equatorial_radius: 6378137 (Type is Int64)
        • polar_radius: 6356752.2999999998 (Type is Float64)
        • seg_number_skip: 3.0000000000000000 (Type is Float64)
        • pair_yatc_ctr_tol: 1000 (Type is Int64)
        • min_valid_h: -460 (Type is Int64)
        • max_valid_h: 8400 (Type is Int64)
        • N_coeffs: 8 (Type is Int64)
        • ATL06_xover_field_list: delta_time, h_li, h_li_sigma, latitude, longitude, atl06_quality_summary, segment_id, x_atc, y_atc, dh_fit_dx, rgt, cycle_number, BP, LR, ref_azimuth, ref_coelv, seg_azimuth, spot, sigma_geo_xt, sigma_geo_at, sigma_geo_h, dac, tide_ocean (Type is String)
        • N_poly_coeffs: 8 (Type is Int64)
        • fullnamepath: /pt2 (Type is String)
      • pt2_cycle_stats
        • description: Parameters describing the input data for each cycle at each reference point (Type is String)
        • fullnamepath: /pt2/cycle_stats (Type is String)
      • pt2_ref_surf
        • description: Parameters describing the reference surface at each reference point (Type is String)
        • poly_exponent_x: 1, 0, 2, 1, 0, 3, 2, 1 (Type is Int64)
        • poly_exponent_y: 0, 1, 0, 1, 2, 0, 1, 2 (Type is Int64)
        • fullnamepath: /pt2/ref_surf (Type is String)
      • pt3
        • beam_pair: 3 (Type is Int64)
        • ReferenceGroundTrack: 519 (Type is Int64)
        • first_cycle: 3 (Type is Int64)
        • last_cycle: 28 (Type is Int64)
        • description: data for pair track %pair_track% (Type is String)
        • L_search_AT: 60 (Type is Int64)
        • L_search_XT: 65 (Type is Int64)
        • seg_sigma_threshold_min: 0.050000000000000003 (Type is Float64)
        • beam_spacing: 90 (Type is Int64)
        • seg_atc_spacing: 100 (Type is Int64)
        • N_search: 3.0000000000000000 (Type is Float64)
        • poly_max_degree_AT: 3 (Type is Int64)
        • poly_max_degree_XT: 2 (Type is Int64)
        • xy_scale: 100.00000000000000 (Type is Float64)
        • t_scale: 31557600.000000000 (Type is Float64)
        • max_fit_iterations: 20 (Type is Int64)
        • equatorial_radius: 6378137 (Type is Int64)
        • polar_radius: 6356752.2999999998 (Type is Float64)
        • seg_number_skip: 3.0000000000000000 (Type is Float64)
        • pair_yatc_ctr_tol: 1000 (Type is Int64)
        • min_valid_h: -460 (Type is Int64)
        • max_valid_h: 8400 (Type is Int64)
        • N_coeffs: 8 (Type is Int64)
        • ATL06_xover_field_list: delta_time, h_li, h_li_sigma, latitude, longitude, atl06_quality_summary, segment_id, x_atc, y_atc, dh_fit_dx, rgt, cycle_number, BP, LR, ref_azimuth, ref_coelv, seg_azimuth, spot, sigma_geo_xt, sigma_geo_at, sigma_geo_h, dac, tide_ocean (Type is String)
        • N_poly_coeffs: 8 (Type is Int64)
        • fullnamepath: /pt3 (Type is String)
      • pt3_cycle_stats
        • description: Parameters describing the input data for each cycle at each reference point (Type is String)
        • fullnamepath: /pt3/cycle_stats (Type is String)
      • pt3_ref_surf
        • description: Parameters describing the reference surface at each reference point (Type is String)
        • poly_exponent_x: 1, 0, 2, 1, 0, 3, 2, 1 (Type is Int64)
        • poly_exponent_y: 0, 1, 0, 1, 2, 0, 1, 2 (Type is Int64)
        • fullnamepath: /pt3/ref_surf (Type is String)
      • quality_assessment
        • description: Contains quality assessment data. This may include QA counters, QA along-track data and/or QA summary data. (Type is String)
        • fullnamepath: /quality_assessment (Type is String)
Global Dimensions
  • View/Hide
      [ /orbit_info_bounding_polygon_dim1 = 0..26 ]
      [ /pt1_cycle_number = 0..25 ]
      [ /pt1_ref_pt = 0..40569 ]
      [ /pt1_ref_surf_poly_exponent_x = 0..7 ]
      [ /pt1_ref_surf_poly_exponent_y = 0..7 ]
      [ /pt2_cycle_number = 0..25 ]
      [ /pt2_ref_pt = 0..40557 ]
      [ /pt2_ref_surf_poly_exponent_x = 0..7 ]
      [ /pt2_ref_surf_poly_exponent_y = 0..7 ]
      [ /pt3_cycle_number = 0..25 ]
      [ /pt3_ref_pt = 0..40534 ]
      [ /pt3_ref_surf_poly_exponent_x = 0..7 ]
      [ /pt3_ref_surf_poly_exponent_y = 0..7 ]
      [ /FakeDim0 = 0..0 ]
Variables
orbit_info_bounding_polygon_dim1[ /orbit_info_bounding_polygon_dim1= 0..26] (Type is Int32)
  • attributes
    • description: Polygon extent vertex count (Type is String)
    • units: 1 (Type is String)
    • long_name: Polygon vertex count (Type is String)
    • source: model (Type is String)
    • origname: bounding_polygon_dim1 (Type is String)
    • fullnamepath: /orbit_info/bounding_polygon_dim1 (Type is String)
pt1_cycle_number[ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: cycle_number (Type is String)
    • units: counts (Type is String)
    • description: cycle number (Type is String)
    • long_name: cycle number (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 1 (Type is Int8)
    • valid_max: 99 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cycle_number (Type is String)
    • fullnamepath: /pt1/cycle_number (Type is String)
pt1_ref_pt[ /pt1_ref_pt= 0..40569] (Type is Int32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: The reference point is the segment_id corresponding to the center of the ATL06 data used for each ATL11 point. Segment_id is counted from the equator crossing of the RGT, with one segment every 20m. (Type is String)
    • long_name: reference point number (Type is String)
    • source: ATL06 (Type is String)
    • coordinates: delta_time latitude longitude (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 2000000 (Type is Int32)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: ref_pt (Type is String)
    • fullnamepath: /pt1/ref_pt (Type is String)
pt1_ref_surf_poly_exponent_x[ /pt1_ref_surf_poly_exponent_x= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_x (Type is String)
    • units: counts (Type is String)
    • description: exponents for the x factors in the surface polynomial (Type is String)
    • long_name: polynomial x exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_x (Type is String)
    • fullnamepath: /pt1/ref_surf/poly_exponent_x (Type is String)
pt1_ref_surf_poly_exponent_y[ /pt1_ref_surf_poly_exponent_y= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_y (Type is String)
    • units: counts (Type is String)
    • description: exponents for the y factors in the surface polynomial (Type is String)
    • long_name: polynomial y exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_y (Type is String)
    • fullnamepath: /pt1/ref_surf/poly_exponent_y (Type is String)
pt2_cycle_number[ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: cycle_number (Type is String)
    • units: counts (Type is String)
    • description: cycle number (Type is String)
    • long_name: cycle number (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 1 (Type is Int8)
    • valid_max: 99 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cycle_number (Type is String)
    • fullnamepath: /pt2/cycle_number (Type is String)
pt2_ref_pt[ /pt2_ref_pt= 0..40557] (Type is Int32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: The reference point is the segment_id corresponding to the center of the ATL06 data used for each ATL11 point. Segment_id is counted from the equator crossing of the RGT, with one segment every 20m. (Type is String)
    • long_name: reference point number (Type is String)
    • source: ATL06 (Type is String)
    • coordinates: delta_time latitude longitude (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 2000000 (Type is Int32)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: ref_pt (Type is String)
    • fullnamepath: /pt2/ref_pt (Type is String)
pt2_ref_surf_poly_exponent_x[ /pt2_ref_surf_poly_exponent_x= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_x (Type is String)
    • units: counts (Type is String)
    • description: exponents for the x factors in the surface polynomial (Type is String)
    • long_name: polynomial x exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_x (Type is String)
    • fullnamepath: /pt2/ref_surf/poly_exponent_x (Type is String)
pt2_ref_surf_poly_exponent_y[ /pt2_ref_surf_poly_exponent_y= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_y (Type is String)
    • units: counts (Type is String)
    • description: exponents for the y factors in the surface polynomial (Type is String)
    • long_name: polynomial y exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_y (Type is String)
    • fullnamepath: /pt2/ref_surf/poly_exponent_y (Type is String)
pt3_cycle_number[ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: cycle_number (Type is String)
    • units: counts (Type is String)
    • description: cycle number (Type is String)
    • long_name: cycle number (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 1 (Type is Int8)
    • valid_max: 99 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cycle_number (Type is String)
    • fullnamepath: /pt3/cycle_number (Type is String)
pt3_ref_pt[ /pt3_ref_pt= 0..40534] (Type is Int32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: The reference point is the segment_id corresponding to the center of the ATL06 data used for each ATL11 point. Segment_id is counted from the equator crossing of the RGT, with one segment every 20m. (Type is String)
    • long_name: reference point number (Type is String)
    • source: ATL06 (Type is String)
    • coordinates: delta_time latitude longitude (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 2000000 (Type is Int32)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: ref_pt (Type is String)
    • fullnamepath: /pt3/ref_pt (Type is String)
pt3_ref_surf_poly_exponent_x[ /pt3_ref_surf_poly_exponent_x= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_x (Type is String)
    • units: counts (Type is String)
    • description: exponents for the x factors in the surface polynomial (Type is String)
    • long_name: polynomial x exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_x (Type is String)
    • fullnamepath: /pt3/ref_surf/poly_exponent_x (Type is String)
pt3_ref_surf_poly_exponent_y[ /pt3_ref_surf_poly_exponent_y= 0..7] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: poly_exponent_y (Type is String)
    • units: counts (Type is String)
    • description: exponents for the y factors in the surface polynomial (Type is String)
    • long_name: polynomial y exponents (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • origname: poly_exponent_y (Type is String)
    • fullnamepath: /pt3/ref_surf/poly_exponent_y (Type is String)
FakeDim0[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • units: level (Type is String)
METADATA_iso_19139_dataset_xml[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: ISO 19139 Dataset XML (Type is String)
    • description: ISO 19139 Dataset XML (Type is String)
    • origname: iso_19139_dataset_xml (Type is String)
    • fullnamepath: /METADATA/iso_19139_dataset_xml (Type is String)
METADATA_iso_19139_series_xml[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: ISO 19139 Series XML (Type is String)
    • description: ISO 19139 Series XML (Type is String)
    • origname: iso_19139_series_xml (Type is String)
    • fullnamepath: /METADATA/iso_19139_series_xml (Type is String)
ancillary_data_release[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: Release Number (Type is String)
    • units: 1 (Type is String)
    • source: Operations (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Release number of the granule. The release number is incremented when the software or ancillary data used to create the granule has been changed. (Type is String)
    • origname: release (Type is String)
    • fullnamepath: /ancillary_data/release (Type is String)
ancillary_data_end_geoseg[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending Geolocation Segment (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. (Type is String)
    • origname: end_geoseg (Type is String)
    • fullnamepath: /ancillary_data/end_geoseg (Type is String)
ancillary_data_version[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: Version (Type is String)
    • units: 1 (Type is String)
    • source: Operations (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Version number of this granule within the release. It is a sequential number corresponding to the number of times the granule has been reprocessed for the current release. (Type is String)
    • origname: version (Type is String)
    • fullnamepath: /ancillary_data/version (Type is String)
ancillary_data_end_region[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending Region (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. (Type is String)
    • origname: end_region (Type is String)
    • fullnamepath: /ancillary_data/end_region (Type is String)
ancillary_data_atlas_sdp_gps_epoch[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: ATLAS Epoch Offset (Type is String)
    • units: seconds since 1980-01-06T00:00:00.000000Z (Type is String)
    • source: Operations (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS Standard Data Product (SDP) epoch (2018-01-01:T00.00.00.000000 UTC). Add this value to delta time parameters to compute full gps_seconds (relative to the GPS epoch) for each data point. (Type is String)
    • origname: atlas_sdp_gps_epoch (Type is String)
    • fullnamepath: /ancillary_data/atlas_sdp_gps_epoch (Type is String)
ancillary_data_end_rgt[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending Reference Groundtrack (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • valid_min: 1 (Type is Int32)
    • valid_max: 1387 (Type is Int32)
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. (Type is String)
    • origname: end_rgt (Type is String)
    • fullnamepath: /ancillary_data/end_rgt (Type is String)
ancillary_data_end_delta_time[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: ATLAS End Time (Actual) (Type is String)
    • standard_name: time (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Number of GPS seconds since the ATLAS SDP epoch at the last data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • origname: end_delta_time (Type is String)
    • fullnamepath: /ancillary_data/end_delta_time (Type is String)
ancillary_data_end_orbit[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending Orbit Number (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. (Type is String)
    • origname: end_orbit (Type is String)
    • fullnamepath: /ancillary_data/end_orbit (Type is String)
ancillary_data_start_cycle[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Starting Cycle (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 99 (Type is Int32)
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. (Type is String)
    • origname: start_cycle (Type is String)
    • fullnamepath: /ancillary_data/start_cycle (Type is String)
ancillary_data_data_end_utc[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: End UTC Time of Granule (CCSDS-A, Actual) (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: UTC (in CCSDS-A format) of the last data point within the granule. (Type is String)
    • origname: data_end_utc (Type is String)
    • fullnamepath: /ancillary_data/data_end_utc (Type is String)
ancillary_data_control[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: Control File (Type is String)
    • units: 1 (Type is String)
    • source: Operations (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: PGE-specific control file used to generate this granule. To re-use, replace breaks (BR) with linefeeds. (Type is String)
    • origname: control (Type is String)
    • fullnamepath: /ancillary_data/control (Type is String)
ancillary_data_start_gpssow[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: Start GPS SOW of Granule (Actual) (Type is String)
    • units: seconds (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS seconds-of-week of the first data point in the granule. (Type is String)
    • origname: start_gpssow (Type is String)
    • fullnamepath: /ancillary_data/start_gpssow (Type is String)
ancillary_data_granule_end_utc[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: End UTC Time of Granule (CCSDS-A, Requested) (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Requested end time (in UTC CCSDS-A) of this granule. (Type is String)
    • origname: granule_end_utc (Type is String)
    • fullnamepath: /ancillary_data/granule_end_utc (Type is String)
ancillary_data_end_cycle[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending Cycle (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 99 (Type is Int32)
    • contentType: auxiliaryInformation (Type is String)
    • description: The ending cycle number associated with the data contained within this granule. The cycle number is the counter of the number of 91-day repeat cycles completed by the mission. (Type is String)
    • origname: end_cycle (Type is String)
    • fullnamepath: /ancillary_data/end_cycle (Type is String)
ancillary_data_granule_start_utc[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: Start UTC Time of Granule (CCSDS-A, Requested) (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Requested start time (in UTC CCSDS-A) of this granule. (Type is String)
    • origname: granule_start_utc (Type is String)
    • fullnamepath: /ancillary_data/granule_start_utc (Type is String)
ancillary_data_start_delta_time[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: ATLAS Start Time (Actual) (Type is String)
    • standard_name: time (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Number of GPS seconds since the ATLAS SDP epoch at the first data point in the file. The ATLAS Standard Data Products (SDP) epoch offset is defined within /ancillary_data/atlas_sdp_gps_epoch as the number of GPS seconds between the GPS epoch (1980-01-06T00:00:00.000000Z UTC) and the ATLAS SDP epoch. By adding the offset contained within atlas_sdp_gps_epoch to delta time parameters, the time in gps_seconds relative to the GPS epoch can be computed. (Type is String)
    • origname: start_delta_time (Type is String)
    • fullnamepath: /ancillary_data/start_delta_time (Type is String)
ancillary_data_start_geoseg[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Starting Geolocation Segment (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting geolocation segment number associated with the data contained within this granule. ICESat granule geographic regions are further refined by geolocation segments. During the geolocation process, a geolocation segment is created approximately every 20m from the start of the orbit to the end. The geolocation segments help align the ATLAS strong a weak beams and provide a common segment length for the L2 and higher products. The geolocation segment indices differ slightly from orbit-to-orbit because of the irregular shape of the Earth. The geolocation segment indices on ATL01 and ATL02 are only approximate because beams have not been aligned at the time of their creation. (Type is String)
    • origname: start_geoseg (Type is String)
    • fullnamepath: /ancillary_data/start_geoseg (Type is String)
ancillary_data_start_orbit[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Starting Orbit Number (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting orbit number associated with the data contained within this granule. The orbit number increments each time the spacecraft completes a full orbit of the Earth. (Type is String)
    • origname: start_orbit (Type is String)
    • fullnamepath: /ancillary_data/start_orbit (Type is String)
ancillary_data_data_start_utc[ /FakeDim0= 0..0] (Type is String)
  • attributes
    • long_name: Start UTC Time of Granule (CCSDS-A, Actual) (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: UTC (in CCSDS-A format) of the first data point within the granule. (Type is String)
    • origname: data_start_utc (Type is String)
    • fullnamepath: /ancillary_data/data_start_utc (Type is String)
ancillary_data_end_gpsweek[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Ending GPSWeek of Granule (Actual) (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS week number of the last data point in the granule. (Type is String)
    • units: weeks from 1980-01-06 (Type is String)
    • source: Derived (Type is String)
    • origname: end_gpsweek (Type is String)
    • fullnamepath: /ancillary_data/end_gpsweek (Type is String)
ancillary_data_start_rgt[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Starting Reference Groundtrack (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • valid_min: 1 (Type is Int32)
    • valid_max: 1387 (Type is Int32)
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting reference groundtrack (RGT) number associated with the data contained within this granule. There are 1387 reference groundtrack in the ICESat-2 repeat orbit. The reference groundtrack increments each time the spacecraft completes a full orbit of the Earth and resets to 1 each time the spacecraft completes a full cycle. (Type is String)
    • origname: start_rgt (Type is String)
    • fullnamepath: /ancillary_data/start_rgt (Type is String)
ancillary_data_end_gpssow[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: Ending GPS SOW of Granule (Actual) (Type is String)
    • units: seconds (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS seconds-of-week of the last data point in the granule. (Type is String)
    • origname: end_gpssow (Type is String)
    • fullnamepath: /ancillary_data/end_gpssow (Type is String)
ancillary_data_qa_at_interval[ /FakeDim0= 0..0] (Type is Float64)
  • attributes
    • long_name: QA Along-Track Interval (Type is String)
    • units: seconds/cell (Type is String)
    • source: control (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: Statistics time interval for along-track QA data. (Type is String)
    • origname: qa_at_interval (Type is String)
    • fullnamepath: /ancillary_data/qa_at_interval (Type is String)
ancillary_data_start_region[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Starting Region (Type is String)
    • units: 1 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: The starting product-specific region number associated with the data contained within this granule. ICESat-2 data products are separated by geographic regions. The data contained within a specific region are the same for ATL01 and ATL02. ATL03 regions differ slightly because of different geolocation segment locations caused by the irregular shape of the Earth. The region indices for other products are completely independent. (Type is String)
    • origname: start_region (Type is String)
    • fullnamepath: /ancillary_data/start_region (Type is String)
ancillary_data_start_gpsweek[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Start GPSWeek of Granule (Actual) (Type is String)
    • units: weeks from 1980-01-06 (Type is String)
    • source: Derived (Type is String)
    • contentType: auxiliaryInformation (Type is String)
    • description: GPS week number of the first data point in the granule. (Type is String)
    • origname: start_gpsweek (Type is String)
    • fullnamepath: /ancillary_data/start_gpsweek (Type is String)
orbit_info_bounding_polygon_lat1[ /orbit_info_bounding_polygon_dim1= 0..26] (Type is Float32)
  • attributes
    • description: Polygon extent vertex latitude (Type is String)
    • units: degrees North (Type is String)
    • long_name: Polygon vertex latitude (Type is String)
    • source: model (Type is String)
    • origname: bounding_polygon_lat1 (Type is String)
    • fullnamepath: /orbit_info/bounding_polygon_lat1 (Type is String)
    • coordinates: orbit_info_bounding_polygon_dim1 (Type is String)
orbit_info_bounding_polygon_lon1[ /orbit_info_bounding_polygon_dim1= 0..26] (Type is Float32)
  • attributes
    • description: Polygon extent vertex longitude (Type is String)
    • units: degrees East (Type is String)
    • long_name: Polygon vertex longitude (Type is String)
    • source: model (Type is String)
    • origname: bounding_polygon_lon1 (Type is String)
    • fullnamepath: /orbit_info/bounding_polygon_lon1 (Type is String)
    • coordinates: orbit_info_bounding_polygon_dim1 (Type is String)
pt1_cycle_stats_atl06_summary_zero_count[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Number of segments with ATL06_quality_summary==0 (0 indicates the best-quality data) (Type is String)
    • long_name: ATL06 best quality count (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • valid_min: 0 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: atl06_summary_zero_count (Type is String)
    • fullnamepath: /pt1/cycle_stats/atl06_summary_zero_count (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_bsnow_conf[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Maximum bsnow_conf flag from ATL06: indicates the greatest (among segments) confidence flag for presence of blowing snow for each cycle (Type is String)
    • long_name: maxmimum blowing snow confidence flag (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -5 (Type is Int8)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_max: 6 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: bsnow_conf (Type is String)
    • fullnamepath: /pt1/cycle_stats/bsnow_conf (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_bsnow_h[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average blowing snow layer height for each cycle (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average blowing snow height (Type is String)
    • source: ATL06 (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: bsnow_h (Type is String)
    • fullnamepath: /pt1/cycle_stats/bsnow_h (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_cloud_flg_asr[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum apparent-surface-reflectance -based cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: Minimum apparent surface reflectance flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 5 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_asr (Type is String)
    • fullnamepath: /pt1/cycle_stats/cloud_flg_asr (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_cloud_flg_atm[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: minimum cloud flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 10 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_atm (Type is String)
    • fullnamepath: /pt1/cycle_stats/cloud_flg_atm (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_dac[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average dynamic atmosphere correction for each pass (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average dynamic atmosphere correction (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dac (Type is String)
    • fullnamepath: /pt1/cycle_stats/dac (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_dh_geoloc[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Height correction to correct for Antarctic geolocation bias (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: geolocation height bias (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dh_geoloc (Type is String)
    • fullnamepath: /pt1/cycle_stats/dh_geoloc (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_h_mean[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: Weighted-average of surface heights, not including the correction for the reference surface (Type is String)
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average uncorrected surface heights (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_mean (Type is String)
    • fullnamepath: /pt1/cycle_stats/h_mean (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_h_rms_misfit[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • long_name: weighted average RMS fit error (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average RMS misfit between PE heights and along-track land-ice segment fit (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_rms_misfit (Type is String)
    • fullnamepath: /pt1/cycle_stats/h_rms_misfit (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_min_signal_selection_source[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • long_name: minimum signal selection source (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 4 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • units: 1 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of the ATL06 signal_selection_source value (indicates the highest-quality segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • origname: min_signal_selection_source (Type is String)
    • fullnamepath: /pt1/cycle_stats/min_signal_selection_source (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_min_snr_significance[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: minumum signal-noise ration significance (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of SNR_significance (indicates the quality of the best segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 1.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: min_snr_significance (Type is String)
    • fullnamepath: /pt1/cycle_stats/min_snr_significance (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_r_eff[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: Weighted-average effective, uncorrected reflectance for each pass. (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average reflectance (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: r_eff (Type is String)
    • fullnamepath: /pt1/cycle_stats/r_eff (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_seg_count[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int32)
  • attributes
    • description: Number of segments marked as valid for each cycle. Equal to 0 for those cycles not included in the reference-surface shape fit. (Type is String)
    • long_name: number valid segments (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 14 (Type is Int32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: seg_count (Type is String)
    • fullnamepath: /pt1/cycle_stats/seg_count (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_sigma_geo_at[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate x horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • source: ATL06 (Type is String)
    • long_name: average horizontal x-coordinate geolocation error (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_at (Type is String)
    • fullnamepath: /pt1/cycle_stats/sigma_geo_at (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_sigma_geo_h[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average total vertical geolocation error due to PPD and POD (Type is String)
    • long_name: average vertical geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_h (Type is String)
    • fullnamepath: /pt1/cycle_stats/sigma_geo_h (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_sigma_geo_xt[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate y horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • long_name: average horizontal y-coordinate geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_xt (Type is String)
    • fullnamepath: /pt1/cycle_stats/sigma_geo_xt (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_tide_ocean[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average ocean tide for each pass (Type is String)
    • long_name: weighted average ocean tide (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: tide_ocean (Type is String)
    • fullnamepath: /pt1/cycle_stats/tide_ocean (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_x_atc[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted average of pair-center RGT x coordinates for each cycle (Type is String)
    • long_name: weighted average rgt x-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt1/cycle_stats/x_atc (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_cycle_stats_y_atc[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted mean of pair-center RGT y coordinates for each cycle (Type is String)
    • long_name: weighted average rgt y-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -30000.000000000000 (Type is Float64)
    • valid_max: 30000.000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt1/cycle_stats/y_atc (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_delta_time[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float64)
  • attributes
    • description: Mean number of GPS seconds since the ATLAS SDP epoch (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /pt1/delta_time (Type is String)
    • coordinates: pt1_latitude pt1_longitude (Type is String)
pt1_h_corr[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the mean corrected height (Type is String)
    • long_name: mean corrected height (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_corr (Type is String)
    • fullnamepath: /pt1/h_corr (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_h_corr_sigma[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 15.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the formal error in the corrected height (Type is String)
    • long_name: mean corrected height error (Type is String)
    • origname: h_corr_sigma (Type is String)
    • fullnamepath: /pt1/h_corr_sigma (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_h_corr_sigma_systematic[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: the magnitude of all errors that might be correlated at scales larger than a single fit center (e.g. pointing errors, GPS errors, etc) (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • long_name: corrected height error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • origname: h_corr_sigma_systematic (Type is String)
    • fullnamepath: /pt1/h_corr_sigma_systematic (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_latitude[ /pt1_ref_pt= 0..40569] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees North (Type is String)
    • description: center latitude based on selected segments (Type is String)
    • long_name: latitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -90.000000000000000 (Type is Float64)
    • valid_max: 90.000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: latitude (Type is String)
    • fullnamepath: /pt1/latitude (Type is String)
    • coordinates: pt1_delta_time pt1_longitude (Type is String)
pt1_longitude[ /pt1_ref_pt= 0..40569] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees East (Type is String)
    • description: center longitude based on selected segments (Type is String)
    • long_name: longitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -180.00000000000000 (Type is Float64)
    • valid_max: 180.00000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: longitude (Type is String)
    • fullnamepath: /pt1/longitude (Type is String)
    • coordinates: pt1_delta_time pt1_latitude (Type is String)
pt1_quality_summary[ /pt1_ref_pt= 0..40569] [ /pt1_cycle_number= 0..25] (Type is Int8)
  • attributes
    • units: 1 (Type is String)
    • description: Summary flag: zero indicates high-quality cycles: where min_signal_selection_source <=1 and min_SNR_significance < 0.02, and ATL06_summary_zero_count >0. (Type is String)
    • long_name: quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • origname: quality_summary (Type is String)
    • fullnamepath: /pt1/quality_summary (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_cycle_number (Type is String)
pt1_ref_surf_at_slope[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean along-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: along-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: at_slope (Type is String)
    • fullnamepath: /pt1/ref_surf/at_slope (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_complex_surface_flag[ /pt1_ref_pt= 0..40569] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • long_name: complex surface flag (Type is String)
    • description: 0 indicates that normal fitting was attempted, 1 indicates that the signal selection algorithm rejected too many repeats, and only a linear fit was attempted (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: complex_surface_flag (Type is String)
    • fullnamepath: /pt1/ref_surf/complex_surface_flag (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_curvature[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the RMS of the slope of the fit polynomial within 50 m of the fit center (Type is String)
    • long_name: curvature (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: curvature (Type is String)
    • fullnamepath: /pt1/ref_surf/curvature (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_deg_x[ /pt1_ref_pt= 0..40569] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in x (Type is String)
    • long_name: max-degree x polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_x (Type is String)
    • fullnamepath: /pt1/ref_surf/deg_x (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_deg_y[ /pt1_ref_pt= 0..40569] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in y (Type is String)
    • long_name: max-degree y polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_y (Type is String)
    • fullnamepath: /pt1/ref_surf/deg_y (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_dem_h[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: DEM elevation, derived from ATL06 /gtxx/atl06_segments/dem/dem_h (Type is String)
    • long_name: DEM elevation (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -400.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dem_h (Type is String)
    • fullnamepath: /pt1/ref_surf/dem_h (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_e_slope[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean East-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: east-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: e_slope (Type is String)
    • fullnamepath: /pt1/ref_surf/e_slope (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_fit_quality[ /pt1_ref_pt= 0..40569] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Indicates quality of the fit: 0: no problem identified, 1: One or more polynomial coefficients has an error of 10 or larger, 2: One or more surface slope components is greater than 0.02, 3: both 1 and 2 (Type is String)
    • long_name: fit quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: fit_quality (Type is String)
    • fullnamepath: /pt1/ref_surf/fit_quality (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_geoid_free2mean[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Additive value to convert geoid heights from the tide-free system to the mean-tide system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_free2mean (Type is String)
    • long_name: Geoid Free-to-Mean conversion (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -10.00000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_free2mean (Type is String)
    • fullnamepath: /pt1/ref_surf/geoid_free2mean (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_geoid_h[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Geoid height above WGS-84 reference ellipsoid in the tide-free system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_h (Type is String)
    • long_name: Geoid Height (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -110.0000000 (Type is Float32)
    • valid_max: 500.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_h (Type is String)
    • fullnamepath: /pt1/ref_surf/geoid_h (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_misfit_chi2r[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • description: misfit chi square, divided by the number of degrees in the solution (Type is String)
    • long_name: misfit chi square (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_chi2r (Type is String)
    • fullnamepath: /pt1/ref_surf/misfit_chi2r (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_misfit_rms[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: RMS misfit for the surface-polynomial fit (Type is String)
    • long_name: misfit RMS (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_rms (Type is String)
    • fullnamepath: /pt1/ref_surf/misfit_rms (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_n_slope[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean North-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: north-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: n_slope (Type is String)
    • fullnamepath: /pt1/ref_surf/n_slope (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_poly_coeffs[ /pt1_ref_pt= 0..40569] [ /pt1_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: polynomial coefficients (Type is String)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • description: polynomial coefficients (up to degree 3), for polynomial components scaled by 100 m (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: poly_coeffs (Type is String)
    • fullnamepath: /pt1/ref_surf/poly_coeffs (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_ref_surf_poly_exponent_x pt1_ref_surf_poly_exponent_y (Type is String)
pt1_ref_surf_poly_coeffs_sigma[ /pt1_ref_pt= 0..40569] [ /pt1_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: formal errors for the polynomial coefficients (Type is String)
    • long_name: polynomial coefficients error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • origname: poly_coeffs_sigma (Type is String)
    • fullnamepath: /pt1/ref_surf/poly_coeffs_sigma (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude pt1_ref_surf_poly_exponent_x pt1_ref_surf_poly_exponent_y (Type is String)
pt1_ref_surf_rgt_azimuth[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees (Type is String)
    • description: Reference track azimuth, in degrees east of local north (Type is String)
    • long_name: RGT azimuth (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -180.0000000 (Type is Float32)
    • valid_max: 180.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: rgt_azimuth (Type is String)
    • fullnamepath: /pt1/ref_surf/rgt_azimuth (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_x_atc[ /pt1_ref_pt= 0..40569] (Type is Float64)
  • attributes
    • valid_min: 0.0000000000000000 (Type is Float64)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Along-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Along track distance (Type is String)
    • source: ATL06 (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt1/ref_surf/x_atc (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_xt_slope[ /pt1_ref_pt= 0..40569] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean cross-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: across-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: xt_slope (Type is String)
    • fullnamepath: /pt1/ref_surf/xt_slope (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt1_ref_surf_y_atc[ /pt1_ref_pt= 0..40569] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Across-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Across track distance (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -20000.000000000000 (Type is Float64)
    • valid_max: 20000.000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt1/ref_surf/y_atc (Type is String)
    • coordinates: pt1_delta_time pt1_latitude pt1_longitude (Type is String)
pt2_cycle_stats_atl06_summary_zero_count[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Number of segments with ATL06_quality_summary==0 (0 indicates the best-quality data) (Type is String)
    • long_name: ATL06 best quality count (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • valid_min: 0 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: atl06_summary_zero_count (Type is String)
    • fullnamepath: /pt2/cycle_stats/atl06_summary_zero_count (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_bsnow_conf[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Maximum bsnow_conf flag from ATL06: indicates the greatest (among segments) confidence flag for presence of blowing snow for each cycle (Type is String)
    • long_name: maxmimum blowing snow confidence flag (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -5 (Type is Int8)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_max: 6 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: bsnow_conf (Type is String)
    • fullnamepath: /pt2/cycle_stats/bsnow_conf (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_bsnow_h[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average blowing snow layer height for each cycle (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average blowing snow height (Type is String)
    • source: ATL06 (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: bsnow_h (Type is String)
    • fullnamepath: /pt2/cycle_stats/bsnow_h (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_cloud_flg_asr[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum apparent-surface-reflectance -based cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: Minimum apparent surface reflectance flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 5 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_asr (Type is String)
    • fullnamepath: /pt2/cycle_stats/cloud_flg_asr (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_cloud_flg_atm[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: minimum cloud flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 10 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_atm (Type is String)
    • fullnamepath: /pt2/cycle_stats/cloud_flg_atm (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_dac[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average dynamic atmosphere correction for each pass (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average dynamic atmosphere correction (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dac (Type is String)
    • fullnamepath: /pt2/cycle_stats/dac (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_dh_geoloc[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Height correction to correct for Antarctic geolocation bias (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: geolocation height bias (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dh_geoloc (Type is String)
    • fullnamepath: /pt2/cycle_stats/dh_geoloc (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_h_mean[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: Weighted-average of surface heights, not including the correction for the reference surface (Type is String)
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average uncorrected surface heights (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_mean (Type is String)
    • fullnamepath: /pt2/cycle_stats/h_mean (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_h_rms_misfit[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • long_name: weighted average RMS fit error (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average RMS misfit between PE heights and along-track land-ice segment fit (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_rms_misfit (Type is String)
    • fullnamepath: /pt2/cycle_stats/h_rms_misfit (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_min_signal_selection_source[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • long_name: minimum signal selection source (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 4 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • units: 1 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of the ATL06 signal_selection_source value (indicates the highest-quality segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • origname: min_signal_selection_source (Type is String)
    • fullnamepath: /pt2/cycle_stats/min_signal_selection_source (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_min_snr_significance[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: minumum signal-noise ration significance (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of SNR_significance (indicates the quality of the best segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 1.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: min_snr_significance (Type is String)
    • fullnamepath: /pt2/cycle_stats/min_snr_significance (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_r_eff[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: Weighted-average effective, uncorrected reflectance for each pass. (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average reflectance (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: r_eff (Type is String)
    • fullnamepath: /pt2/cycle_stats/r_eff (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_seg_count[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int32)
  • attributes
    • description: Number of segments marked as valid for each cycle. Equal to 0 for those cycles not included in the reference-surface shape fit. (Type is String)
    • long_name: number valid segments (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 14 (Type is Int32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: seg_count (Type is String)
    • fullnamepath: /pt2/cycle_stats/seg_count (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_sigma_geo_at[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate x horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • source: ATL06 (Type is String)
    • long_name: average horizontal x-coordinate geolocation error (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_at (Type is String)
    • fullnamepath: /pt2/cycle_stats/sigma_geo_at (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_sigma_geo_h[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average total vertical geolocation error due to PPD and POD (Type is String)
    • long_name: average vertical geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_h (Type is String)
    • fullnamepath: /pt2/cycle_stats/sigma_geo_h (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_sigma_geo_xt[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate y horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • long_name: average horizontal y-coordinate geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_xt (Type is String)
    • fullnamepath: /pt2/cycle_stats/sigma_geo_xt (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_tide_ocean[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average ocean tide for each pass (Type is String)
    • long_name: weighted average ocean tide (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: tide_ocean (Type is String)
    • fullnamepath: /pt2/cycle_stats/tide_ocean (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_x_atc[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted average of pair-center RGT x coordinates for each cycle (Type is String)
    • long_name: weighted average rgt x-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt2/cycle_stats/x_atc (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_cycle_stats_y_atc[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted mean of pair-center RGT y coordinates for each cycle (Type is String)
    • long_name: weighted average rgt y-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -30000.000000000000 (Type is Float64)
    • valid_max: 30000.000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt2/cycle_stats/y_atc (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_delta_time[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float64)
  • attributes
    • description: Mean number of GPS seconds since the ATLAS SDP epoch (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /pt2/delta_time (Type is String)
    • coordinates: pt2_latitude pt2_longitude (Type is String)
pt2_h_corr[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the mean corrected height (Type is String)
    • long_name: mean corrected height (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_corr (Type is String)
    • fullnamepath: /pt2/h_corr (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_h_corr_sigma[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 15.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the formal error in the corrected height (Type is String)
    • long_name: mean corrected height error (Type is String)
    • origname: h_corr_sigma (Type is String)
    • fullnamepath: /pt2/h_corr_sigma (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_h_corr_sigma_systematic[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: the magnitude of all errors that might be correlated at scales larger than a single fit center (e.g. pointing errors, GPS errors, etc) (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • long_name: corrected height error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • origname: h_corr_sigma_systematic (Type is String)
    • fullnamepath: /pt2/h_corr_sigma_systematic (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_latitude[ /pt2_ref_pt= 0..40557] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees North (Type is String)
    • description: center latitude based on selected segments (Type is String)
    • long_name: latitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -90.000000000000000 (Type is Float64)
    • valid_max: 90.000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: latitude (Type is String)
    • fullnamepath: /pt2/latitude (Type is String)
    • coordinates: pt2_delta_time pt2_longitude (Type is String)
pt2_longitude[ /pt2_ref_pt= 0..40557] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees East (Type is String)
    • description: center longitude based on selected segments (Type is String)
    • long_name: longitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -180.00000000000000 (Type is Float64)
    • valid_max: 180.00000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: longitude (Type is String)
    • fullnamepath: /pt2/longitude (Type is String)
    • coordinates: pt2_delta_time pt2_latitude (Type is String)
pt2_quality_summary[ /pt2_ref_pt= 0..40557] [ /pt2_cycle_number= 0..25] (Type is Int8)
  • attributes
    • units: 1 (Type is String)
    • description: Summary flag: zero indicates high-quality cycles: where min_signal_selection_source <=1 and min_SNR_significance < 0.02, and ATL06_summary_zero_count >0. (Type is String)
    • long_name: quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • origname: quality_summary (Type is String)
    • fullnamepath: /pt2/quality_summary (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_cycle_number (Type is String)
pt2_ref_surf_at_slope[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean along-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: along-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: at_slope (Type is String)
    • fullnamepath: /pt2/ref_surf/at_slope (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_complex_surface_flag[ /pt2_ref_pt= 0..40557] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • long_name: complex surface flag (Type is String)
    • description: 0 indicates that normal fitting was attempted, 1 indicates that the signal selection algorithm rejected too many repeats, and only a linear fit was attempted (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: complex_surface_flag (Type is String)
    • fullnamepath: /pt2/ref_surf/complex_surface_flag (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_curvature[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the RMS of the slope of the fit polynomial within 50 m of the fit center (Type is String)
    • long_name: curvature (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: curvature (Type is String)
    • fullnamepath: /pt2/ref_surf/curvature (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_deg_x[ /pt2_ref_pt= 0..40557] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in x (Type is String)
    • long_name: max-degree x polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_x (Type is String)
    • fullnamepath: /pt2/ref_surf/deg_x (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_deg_y[ /pt2_ref_pt= 0..40557] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in y (Type is String)
    • long_name: max-degree y polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_y (Type is String)
    • fullnamepath: /pt2/ref_surf/deg_y (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_dem_h[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: DEM elevation, derived from ATL06 /gtxx/atl06_segments/dem/dem_h (Type is String)
    • long_name: DEM elevation (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -400.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dem_h (Type is String)
    • fullnamepath: /pt2/ref_surf/dem_h (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_e_slope[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean East-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: east-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: e_slope (Type is String)
    • fullnamepath: /pt2/ref_surf/e_slope (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_fit_quality[ /pt2_ref_pt= 0..40557] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Indicates quality of the fit: 0: no problem identified, 1: One or more polynomial coefficients has an error of 10 or larger, 2: One or more surface slope components is greater than 0.02, 3: both 1 and 2 (Type is String)
    • long_name: fit quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: fit_quality (Type is String)
    • fullnamepath: /pt2/ref_surf/fit_quality (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_geoid_free2mean[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Additive value to convert geoid heights from the tide-free system to the mean-tide system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_free2mean (Type is String)
    • long_name: Geoid Free-to-Mean conversion (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -10.00000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_free2mean (Type is String)
    • fullnamepath: /pt2/ref_surf/geoid_free2mean (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_geoid_h[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Geoid height above WGS-84 reference ellipsoid in the tide-free system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_h (Type is String)
    • long_name: Geoid Height (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -110.0000000 (Type is Float32)
    • valid_max: 500.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_h (Type is String)
    • fullnamepath: /pt2/ref_surf/geoid_h (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_misfit_chi2r[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • description: misfit chi square, divided by the number of degrees in the solution (Type is String)
    • long_name: misfit chi square (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_chi2r (Type is String)
    • fullnamepath: /pt2/ref_surf/misfit_chi2r (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_misfit_rms[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: RMS misfit for the surface-polynomial fit (Type is String)
    • long_name: misfit RMS (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_rms (Type is String)
    • fullnamepath: /pt2/ref_surf/misfit_rms (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_n_slope[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean North-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: north-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: n_slope (Type is String)
    • fullnamepath: /pt2/ref_surf/n_slope (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_poly_coeffs[ /pt2_ref_pt= 0..40557] [ /pt2_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: polynomial coefficients (Type is String)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • description: polynomial coefficients (up to degree 3), for polynomial components scaled by 100 m (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: poly_coeffs (Type is String)
    • fullnamepath: /pt2/ref_surf/poly_coeffs (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_ref_surf_poly_exponent_x pt2_ref_surf_poly_exponent_y (Type is String)
pt2_ref_surf_poly_coeffs_sigma[ /pt2_ref_pt= 0..40557] [ /pt2_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: formal errors for the polynomial coefficients (Type is String)
    • long_name: polynomial coefficients error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • origname: poly_coeffs_sigma (Type is String)
    • fullnamepath: /pt2/ref_surf/poly_coeffs_sigma (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude pt2_ref_surf_poly_exponent_x pt2_ref_surf_poly_exponent_y (Type is String)
pt2_ref_surf_rgt_azimuth[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees (Type is String)
    • description: Reference track azimuth, in degrees east of local north (Type is String)
    • long_name: RGT azimuth (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -180.0000000 (Type is Float32)
    • valid_max: 180.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: rgt_azimuth (Type is String)
    • fullnamepath: /pt2/ref_surf/rgt_azimuth (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_x_atc[ /pt2_ref_pt= 0..40557] (Type is Float64)
  • attributes
    • valid_min: 0.0000000000000000 (Type is Float64)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Along-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Along track distance (Type is String)
    • source: ATL06 (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt2/ref_surf/x_atc (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_xt_slope[ /pt2_ref_pt= 0..40557] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean cross-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: across-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: xt_slope (Type is String)
    • fullnamepath: /pt2/ref_surf/xt_slope (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt2_ref_surf_y_atc[ /pt2_ref_pt= 0..40557] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Across-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Across track distance (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -20000.000000000000 (Type is Float64)
    • valid_max: 20000.000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt2/ref_surf/y_atc (Type is String)
    • coordinates: pt2_delta_time pt2_latitude pt2_longitude (Type is String)
pt3_cycle_stats_atl06_summary_zero_count[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Number of segments with ATL06_quality_summary==0 (0 indicates the best-quality data) (Type is String)
    • long_name: ATL06 best quality count (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • valid_min: 0 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: atl06_summary_zero_count (Type is String)
    • fullnamepath: /pt3/cycle_stats/atl06_summary_zero_count (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_bsnow_conf[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Maximum bsnow_conf flag from ATL06: indicates the greatest (among segments) confidence flag for presence of blowing snow for each cycle (Type is String)
    • long_name: maxmimum blowing snow confidence flag (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -5 (Type is Int8)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_max: 6 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: bsnow_conf (Type is String)
    • fullnamepath: /pt3/cycle_stats/bsnow_conf (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_bsnow_h[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average blowing snow layer height for each cycle (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average blowing snow height (Type is String)
    • source: ATL06 (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: bsnow_h (Type is String)
    • fullnamepath: /pt3/cycle_stats/bsnow_h (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_cloud_flg_asr[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum apparent-surface-reflectance -based cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: Minimum apparent surface reflectance flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 5 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_asr (Type is String)
    • fullnamepath: /pt3/cycle_stats/cloud_flg_asr (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_cloud_flg_atm[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • description: Minimum cloud flag from ATL06: Flag indicates confidence that clouds with OT > 0.2 are present in the lower 3 km of the atmosphere based on ATL09 (Type is String)
    • long_name: minimum cloud flag (Type is String)
    • source: ATL06 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: 1 (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 10 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: cloud_flg_atm (Type is String)
    • fullnamepath: /pt3/cycle_stats/cloud_flg_atm (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_dac[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Weighted-average dynamic atmosphere correction for each pass (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average dynamic atmosphere correction (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dac (Type is String)
    • fullnamepath: /pt3/cycle_stats/dac (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_dh_geoloc[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • description: Height correction to correct for Antarctic geolocation bias (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: geolocation height bias (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dh_geoloc (Type is String)
    • fullnamepath: /pt3/cycle_stats/dh_geoloc (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_h_mean[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: Weighted-average of surface heights, not including the correction for the reference surface (Type is String)
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average uncorrected surface heights (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_mean (Type is String)
    • fullnamepath: /pt3/cycle_stats/h_mean (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_h_rms_misfit[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • long_name: weighted average RMS fit error (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average RMS misfit between PE heights and along-track land-ice segment fit (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_rms_misfit (Type is String)
    • fullnamepath: /pt3/cycle_stats/h_rms_misfit (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_min_signal_selection_source[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • long_name: minimum signal selection source (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 4 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • units: 1 (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of the ATL06 signal_selection_source value (indicates the highest-quality segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • origname: min_signal_selection_source (Type is String)
    • fullnamepath: /pt3/cycle_stats/min_signal_selection_source (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_min_snr_significance[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: minumum signal-noise ration significance (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Minimum of SNR_significance (indicates the quality of the best segment in the cycle) (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 1.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: min_snr_significance (Type is String)
    • fullnamepath: /pt3/cycle_stats/min_snr_significance (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_r_eff[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: Weighted-average effective, uncorrected reflectance for each pass. (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • long_name: weighted average reflectance (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: r_eff (Type is String)
    • fullnamepath: /pt3/cycle_stats/r_eff (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_seg_count[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int32)
  • attributes
    • description: Number of segments marked as valid for each cycle. Equal to 0 for those cycles not included in the reference-surface shape fit. (Type is String)
    • long_name: number valid segments (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 14 (Type is Int32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: counts (Type is String)
    • _FillValue: 2147483647 (Type is Int64)
    • origname: seg_count (Type is String)
    • fullnamepath: /pt3/cycle_stats/seg_count (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_sigma_geo_at[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate x horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • source: ATL06 (Type is String)
    • long_name: average horizontal x-coordinate geolocation error (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_at (Type is String)
    • fullnamepath: /pt3/cycle_stats/sigma_geo_at (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_sigma_geo_h[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: Root-mean-weighted-square-average total vertical geolocation error due to PPD and POD (Type is String)
    • long_name: average vertical geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_h (Type is String)
    • fullnamepath: /pt3/cycle_stats/sigma_geo_h (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_sigma_geo_xt[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Root-mean-weighted-square-average local-coordinate y horizontal geolocation error for each cycle due to PPD and POD (Type is String)
    • long_name: average horizontal y-coordinate geolocation error (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: sigma_geo_xt (Type is String)
    • fullnamepath: /pt3/cycle_stats/sigma_geo_xt (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_tide_ocean[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • description: Weighted-average ocean tide for each pass (Type is String)
    • long_name: weighted average ocean tide (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -50.00000000 (Type is Float32)
    • valid_max: 50.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: tide_ocean (Type is String)
    • fullnamepath: /pt3/cycle_stats/tide_ocean (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_x_atc[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted average of pair-center RGT x coordinates for each cycle (Type is String)
    • long_name: weighted average rgt x-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt3/cycle_stats/x_atc (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_cycle_stats_y_atc[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float64)
  • attributes
    • units: meters (Type is String)
    • description: weighted mean of pair-center RGT y coordinates for each cycle (Type is String)
    • long_name: weighted average rgt y-coordinates (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -30000.000000000000 (Type is Float64)
    • valid_max: 30000.000000000000 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt3/cycle_stats/y_atc (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_delta_time[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float64)
  • attributes
    • description: Mean number of GPS seconds since the ATLAS SDP epoch (Type is String)
    • long_name: Elapsed GPS seconds (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: 0.0000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: seconds since 2018-01-01 (Type is String)
    • origname: delta_time (Type is String)
    • fullnamepath: /pt3/delta_time (Type is String)
    • coordinates: pt3_latitude pt3_longitude (Type is String)
pt3_h_corr[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the mean corrected height (Type is String)
    • long_name: mean corrected height (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: -460.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: h_corr (Type is String)
    • fullnamepath: /pt3/h_corr (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_h_corr_sigma[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • valid_max: 15.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • description: the formal error in the corrected height (Type is String)
    • long_name: mean corrected height error (Type is String)
    • origname: h_corr_sigma (Type is String)
    • fullnamepath: /pt3/h_corr_sigma (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_h_corr_sigma_systematic[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Float32)
  • attributes
    • description: the magnitude of all errors that might be correlated at scales larger than a single fit center (e.g. pointing errors, GPS errors, etc) (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • units: meters (Type is String)
    • long_name: corrected height error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • origname: h_corr_sigma_systematic (Type is String)
    • fullnamepath: /pt3/h_corr_sigma_systematic (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_latitude[ /pt3_ref_pt= 0..40534] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees North (Type is String)
    • description: center latitude based on selected segments (Type is String)
    • long_name: latitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -90.000000000000000 (Type is Float64)
    • valid_max: 90.000000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: latitude (Type is String)
    • fullnamepath: /pt3/latitude (Type is String)
    • coordinates: pt3_delta_time pt3_longitude (Type is String)
pt3_longitude[ /pt3_ref_pt= 0..40534] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees East (Type is String)
    • description: center longitude based on selected segments (Type is String)
    • long_name: longitude (Type is String)
    • source: ATL06 segments (Type is String)
    • valid_min: -180.00000000000000 (Type is Float64)
    • valid_max: 180.00000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: longitude (Type is String)
    • fullnamepath: /pt3/longitude (Type is String)
    • coordinates: pt3_delta_time pt3_latitude (Type is String)
pt3_quality_summary[ /pt3_ref_pt= 0..40534] [ /pt3_cycle_number= 0..25] (Type is Int8)
  • attributes
    • units: 1 (Type is String)
    • description: Summary flag: zero indicates high-quality cycles: where min_signal_selection_source <=1 and min_SNR_significance < 0.02, and ATL06_summary_zero_count >0. (Type is String)
    • long_name: quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • DIMENSION_LABELS: ref_pt, cycle_number (Type is String)
    • origname: quality_summary (Type is String)
    • fullnamepath: /pt3/quality_summary (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_cycle_number (Type is String)
pt3_ref_surf_at_slope[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean along-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: along-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: at_slope (Type is String)
    • fullnamepath: /pt3/ref_surf/at_slope (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_complex_surface_flag[ /pt3_ref_pt= 0..40534] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • long_name: complex surface flag (Type is String)
    • description: 0 indicates that normal fitting was attempted, 1 indicates that the signal selection algorithm rejected too many repeats, and only a linear fit was attempted (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 1 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: complex_surface_flag (Type is String)
    • fullnamepath: /pt3/ref_surf/complex_surface_flag (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_curvature[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the RMS of the slope of the fit polynomial within 50 m of the fit center (Type is String)
    • long_name: curvature (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: curvature (Type is String)
    • fullnamepath: /pt3/ref_surf/curvature (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_deg_x[ /pt3_ref_pt= 0..40534] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in x (Type is String)
    • long_name: max-degree x polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_x (Type is String)
    • fullnamepath: /pt3/ref_surf/deg_x (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_deg_y[ /pt3_ref_pt= 0..40534] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: counts (Type is String)
    • description: Maximum degree of non-zero polynomial components in y (Type is String)
    • long_name: max-degree y polynomial (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: deg_y (Type is String)
    • fullnamepath: /pt3/ref_surf/deg_y (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_dem_h[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: DEM elevation, derived from ATL06 /gtxx/atl06_segments/dem/dem_h (Type is String)
    • long_name: DEM elevation (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -400.0000000 (Type is Float32)
    • valid_max: 8400.000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: dem_h (Type is String)
    • fullnamepath: /pt3/ref_surf/dem_h (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_e_slope[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean East-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: east-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: e_slope (Type is String)
    • fullnamepath: /pt3/ref_surf/e_slope (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_fit_quality[ /pt3_ref_pt= 0..40534] (Type is Int8)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Indicates quality of the fit: 0: no problem identified, 1: One or more polynomial coefficients has an error of 10 or larger, 2: One or more surface slope components is greater than 0.02, 3: both 1 and 2 (Type is String)
    • long_name: fit quality summary (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0 (Type is Int8)
    • valid_max: 3 (Type is Int8)
    • _FillValue: 127 (Type is Int64)
    • origname: fit_quality (Type is String)
    • fullnamepath: /pt3/ref_surf/fit_quality (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_geoid_free2mean[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Additive value to convert geoid heights from the tide-free system to the mean-tide system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_free2mean (Type is String)
    • long_name: Geoid Free-to-Mean conversion (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -10.00000000 (Type is Float32)
    • valid_max: 10.00000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_free2mean (Type is String)
    • fullnamepath: /pt3/ref_surf/geoid_free2mean (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_geoid_h[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Geoid height above WGS-84 reference ellipsoid in the tide-free system, derived from ATL06 /gtxx/atl06_segments/dem/geoid_h (Type is String)
    • long_name: Geoid Height (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -110.0000000 (Type is Float32)
    • valid_max: 500.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: geoid_h (Type is String)
    • fullnamepath: /pt3/ref_surf/geoid_h (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_misfit_chi2r[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • units: meters (Type is String)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • description: misfit chi square, divided by the number of degrees in the solution (Type is String)
    • long_name: misfit chi square (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_chi2r (Type is String)
    • fullnamepath: /pt3/ref_surf/misfit_chi2r (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_misfit_rms[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: RMS misfit for the surface-polynomial fit (Type is String)
    • long_name: misfit RMS (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • valid_min: 0.000000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: misfit_rms (Type is String)
    • fullnamepath: /pt3/ref_surf/misfit_rms (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_n_slope[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: the mean North-component slope for the reference surface within 50 m of the fit center (Type is String)
    • long_name: north-component slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: n_slope (Type is String)
    • fullnamepath: /pt3/ref_surf/n_slope (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_poly_coeffs[ /pt3_ref_pt= 0..40534] [ /pt3_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • long_name: polynomial coefficients (Type is String)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • description: polynomial coefficients (up to degree 3), for polynomial components scaled by 100 m (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: poly_coeffs (Type is String)
    • fullnamepath: /pt3/ref_surf/poly_coeffs (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_ref_surf_poly_exponent_x pt3_ref_surf_poly_exponent_y (Type is String)
pt3_ref_surf_poly_coeffs_sigma[ /pt3_ref_pt= 0..40534] [ /pt3_ref_surf_poly_exponent_x= 0..7] (Type is Float32)
  • attributes
    • units: 1 (Type is String)
    • description: formal errors for the polynomial coefficients (Type is String)
    • long_name: polynomial coefficients error (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • DIMENSION_LABELS: ref_pt, (poly_exponent_x, poly_exponent_y) (Type is String)
    • origname: poly_coeffs_sigma (Type is String)
    • fullnamepath: /pt3/ref_surf/poly_coeffs_sigma (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude pt3_ref_surf_poly_exponent_x pt3_ref_surf_poly_exponent_y (Type is String)
pt3_ref_surf_rgt_azimuth[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: degrees (Type is String)
    • description: Reference track azimuth, in degrees east of local north (Type is String)
    • long_name: RGT azimuth (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -180.0000000 (Type is Float32)
    • valid_max: 180.0000000 (Type is Float32)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: rgt_azimuth (Type is String)
    • fullnamepath: /pt3/ref_surf/rgt_azimuth (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_x_atc[ /pt3_ref_pt= 0..40534] (Type is Float64)
  • attributes
    • valid_min: 0.0000000000000000 (Type is Float64)
    • valid_max: 40200000.000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Along-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Along track distance (Type is String)
    • source: ATL06 (Type is String)
    • origname: x_atc (Type is String)
    • fullnamepath: /pt3/ref_surf/x_atc (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_xt_slope[ /pt3_ref_pt= 0..40534] (Type is Float32)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: 1 (Type is String)
    • description: Mean cross-track component of the slope of the reference surface within 50 m of the fit center (Type is String)
    • long_name: across-track slope (Type is String)
    • source: derived, ATL11 algorithm (Type is String)
    • _FillValue: 3.402823466e+38 (Type is Float32)
    • origname: xt_slope (Type is String)
    • fullnamepath: /pt3/ref_surf/xt_slope (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
pt3_ref_surf_y_atc[ /pt3_ref_pt= 0..40534] (Type is Float64)
  • attributes
    • DIMENSION_LABELS: ref_pt (Type is String)
    • units: meters (Type is String)
    • description: Across-track coordinate of the reference point, measured along the RGT from its first equator crossing. (Type is String)
    • long_name: Across track distance (Type is String)
    • source: ATL06 (Type is String)
    • valid_min: -20000.000000000000 (Type is Float64)
    • valid_max: 20000.000000000000 (Type is Float64)
    • _FillValue: 1.7976931348623157e+308 (Type is Float64)
    • origname: y_atc (Type is String)
    • fullnamepath: /pt3/ref_surf/y_atc (Type is String)
    • coordinates: pt3_delta_time pt3_latitude pt3_longitude (Type is String)
quality_assessment_qa_granule_fail_reason[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Granule Failure Reason (Type is String)
    • units: 1 (Type is String)
    • source: Operations (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 5 (Type is Int32)
    • contentType: qualityInformation (Type is String)
    • description: Flag indicating granule failure reason. 0=no failure; 1=processing error; 2=Insufficient output data was generated; 3=TBD Failure; 4=TBD_Failure; 5=other failure. (Type is String)
    • flag_meanings: no_failure PROCESS_ERROR INSUFFICIENT_OUTPUT failure_3 failure_4 OTHER_FAILURE (Type is String)
    • flag_values: 0, 1, 2, 3, 4, 5 (Type is Int32)
    • origname: qa_granule_fail_reason (Type is String)
    • fullnamepath: /quality_assessment/qa_granule_fail_reason (Type is String)
quality_assessment_qa_granule_pass_fail[ /FakeDim0= 0..0] (Type is Int32)
  • attributes
    • long_name: Granule Pass Flag (Type is String)
    • units: 1 (Type is String)
    • source: Operations (Type is String)
    • valid_min: 0 (Type is Int32)
    • valid_max: 1 (Type is Int32)
    • contentType: qualityInformation (Type is String)
    • description: Flag indicating granule quality. 0=granule passes automatic QA. 1=granule fails automatic QA. (Type is String)
    • flag_meanings: PASS FAIL (Type is String)
    • flag_values: 0, 1 (Type is Int32)
    • origname: qa_granule_pass_fail (Type is String)
    • fullnamepath: /quality_assessment/qa_granule_pass_fail (Type is String)
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