2026-10-27T16:54:51Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/ATL03.0032026-03-24T14:43:11Zcumulusretirednasa_nsidc_daac
ATL03.003ATLAS/ICESat-2 L2A Global Geolocated Photon DataNeumann, T. A., Brenner, A., Hancock, D., Robbins, J., Saba, J., Harbeck, K., Gibbons, A., Lee, J., Luthcke, S. B., Rebold, T. et alATLAS/ICESat-2 L2A Global Geolocated Photon Data2020-05-05Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center3false10.5067/ATLAS/ATL03.003https://nsidc.org/sites/default/files/atl03-v003-userguide_1.pdfATL03Technical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCELAND SURFACETOPOGRAPHYTERRAIN ELEVATION Climatology/Meteorology/Atmosphereicesat2-projectATLASAdvanced Topographic Laser Altimeter SystemICESat-2Ice, Cloud, and land Elevation Satellite-22018-10-132020-11-11deprecated-9090-180180GEOGRAPHIC REGIONGLOBAL70 cm70 cm91 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 (ATL03) contains height above the WGS 84 ellipsoid (ITRF2014 reference frame), latitude, longitude, and time for all photons downlinked by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the Ice, Cloud and land Elevation Satellite-2 (ICESat-2) observatory. The ATL03 product was designed to be a single source for all photon data and ancillary information needed by higher-level ATLAS/ICESat-2 products. As such, it also includes spacecraft and instrument parameters and ancillary data not explicitly required for ATL03.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/default/files/atl03-v003-userguide_1.pdfATLAS/ICESat-2 L2A Global Geolocated Photon Data, Version 3 User GuideCEOS IDN DIFVERSION 9.92020-05-052026-03-24NSIDCVersion SummaryAdded a QA parameter that indicates the percent of reference photons within a certain distance from the reference DEM (at the geolocation segment rate); Fixed a logic error in the code that combines the POD and PPD degrade values. In conjunction with this fix, the definition of the podppd_flag parameter was changed to simply indicate if POD, PPD, or both report, in general, a degraded geolocation solution; Effectively removed from consideration by the signal classification processing any photons from telemetry bands that do not intersect the DEM height within a +/- 30 m buffer. Additionally, photons that are poorly geolocated (as indicated by the podppd_flag) are no longer classified as potential signal; Created two new parameters (near_sat_frac and full_sat_frac) that indicate nearly or fully saturated ATLAS shots.NSIDCMinor VersionNSIDCSpatial Reference SystemsEPSG:4326WGS 84NSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationNeumann, T. A., Brenner, A., Hancock, D., Robbins, J., Saba, J., Harbeck, K., Gibbons, A., Lee, J., Luthcke, S. B., Rebold, T. et al. (2020). <i>ATLAS/ICESat-2 L2A Global Geolocated Photon Data</i>. (ATL03, Version 3). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/ATLAS/ATL03.003">https://doi.org/10.5067/ATLAS/ATL03.003</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredtrue