2026-05-14T11:13:14Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/ATL10.0042026-04-01T18:16:22Zcumulusretirednasa_nsidc_daac
ATL10.004ATLAS/ICESat-2 L3A Sea Ice FreeboardKwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science TeamATLAS/ICESat-2 L3A Sea Ice Freeboard2021-04-13Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center4false10.5067/ATLAS/ATL10.004https://nsidc.org/sites/default/files/atl10-v004-userguide_1.pdfATL10Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHERESEA ICEFREEBOARD Climatology/Meteorology/Atmosphereicesat2-projectSea Ice Prediction Network-projectSIPN ice thickness-projectSIPN-projectATLASAdvanced Topographic Laser Altimeter SystemICESat-2Ice, Cloud, and land Elevation Satellite-22018-10-142021-07-15deprecated-9090-180180GEOGRAPHIC REGIONNORTHERN HEMISPHEREGEOGRAPHIC REGIONSOUTHERN HEMISPHEREVaries91 dayThese data have been retired and are no longer accessible, though a more recent version of these data may be available.These data have been retired and are no longer available for use, though a more recent version of these data may be available. Cite any prior or planned use of these data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright. For more information on the NASA ESDIS Data Use Guidance, see https://www.earthdata.nasa.gov/engage/open-data-services-software-policies/data-use-guidance.EnglishNASA/GSFC/SED/ESD/I2-SIPSNASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAHTTPSHDF5This data set (ATL10) contains estimates of sea ice freeboard, calculated using three different approaches. Sea ice leads used to establish the reference sea surface and descriptive statistics used in the height estimates are also provided. The data were acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/atl10-v004-userguide_1.pdfATLAS/ICESat-2 L3A Sea Ice Freeboard, Version 4 User GuideCEOS IDN DIFVERSION 9.92021-04-132026-04-01NSIDCVersion SummaryImplemented freeboard beam along-track slope for ATL10; referenced surface along-track slope is now reported on ATL10; Updated the default value of the controllable parameter height_segment_fit_quality_flag_max to 4; The default values of upper and lower bounds of the freeboard reference surface and ht_thresh2 have been updated to match the ATBD; Mean sea surface, geoid, and height data products are placed into a consistent tide-free system. Free-to-mean tide conversion factors are included to easily change to mean tide system.NSIDCMinor VersionNSIDCSpatial Reference SystemsEPSG:4326WGS 84NSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationKwok, R., Petty, A. A., Cunningham, G., Markus, T., Hancock, D., Ivanoff, A., Wimert, J., Bagnardi, M., Kurtz, N. & the ICESat-2 Science Team. (2021). <i>ATLAS/ICESat-2 L3A Sea Ice Freeboard</i>. (ATL10, Version 4). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/ATLAS/ATL10.004">https://doi.org/10.5067/ATLAS/ATL10.004</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredtrue