2024-03-28T23:55:35Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/NSIDC-00532024-02-26T18:15:56Zv0_daacv0_allnasa_nsidc_daac
NSIDC-0053Seasat and GEOSAT Altimetry for the Antarctic and Greenland Ice SheetsZwally, J. and A. BrennerSeasat and GEOSAT Altimetry for the Antarctic and Greenland Ice Sheets1997-01-01Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/MTIF60G86H86https://doi.org/10.5067/MTIF60G86H86NSIDC-0053InvestigatorH.JayZwallyJay.Zwally@nasa.gov1-301-614-56431-301-614-5644Laboratory for Hydrospheric ProcessesNASA/Goddard Space Flight CenterCode 971GreenbeltMD20771USAInvestigatorAnitaBrenneranita.brenner@gsfc.nasa.govCode 614.5GreenbeltMD20771USATechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSGLACIER ELEVATION/ICE SHEET ELEVATION EARTH SCIENCETERRESTRIAL HYDROSPHEREGLACIERS/ICE SHEETSGLACIER ELEVATION/ICE SHEET ELEVATION EARTH SCIENCECRYOSPHEREGLACIERS/ICE SHEETSICE SHEETS EARTH SCIENCETERRESTRIAL HYDROSPHEREGLACIERS/ICE SHEETSICE SHEETS AltimetryAntarcticDEMs Antarctica-projectDEMs Greenland-projectDEMs-projectGoddard Space Flight CenterGreenlandice sheetsNASARadarRadar AltimetrySatellite Radar DataRADAR ALTIMETERSGEOSATGeodetic SatelliteSEASATOcean Dynamics Satellite1978-06-011986-09-30complete6072-60-20ContinentNorth AmericaGreenlandContinentAntarcticaESIPEarth Science Information Partners ProgramEOSDISEarth Observing System Data Information SystemThese data are freely, openly, and fully accessible, provided that you are logged into your NASA Earthdata profile (https://urs.earthdata.nasa.gov/).These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/use_copyright.html. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.EnglishNASA 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 ColoradoBoulderCO80309-0449USAFTPBinaryFTPASCIINational Snow and Ice Data Center. 1985-1986. Users' Manual on the Ice Altimetry System CD-ROM.
NSIDC Distributed Active Archive Center, University of Colorado at
Boulder. Seasat and GEOSAT Ice Altimetry Data. Digital data available
from nsidc@kryos.colorado.edu. Boulder, Colorado.
Zwally, H. J., A. C. Brenner, J. A. Major, T. V. Martin, and R. A.
Bindschadler. 1990. Satellite radar altimetry over ice. Processing and
corrections of Seasat data over Greenland. NASA Reference Publication 1:
1233.
Zwally, H. Jay, Judy A. Major, Anita C. Brenner, and Robert A.
Bindschadler. 1987. Ice measurements by GEOSAT radar altimetry. Johns
Hopkins APL Technical Digest. 8:2:251-254.<p><font color="#FF0000">Note: This data set is now on HTTPS so references to CD-ROM are historic and no longer applicable.</font></p>
The Ice Altimetry System (IAS) data seet contains surface elevations of the Antarctic and Greenland ice sheets derived from Seasat and GEOSAT radar altimetry data. The Seasat data were collected for a continuous 90 days in 1978, at latitudes between 72 degrees South and 72 degrees North. GEOSAT was launched in 1985 and placed in a nearly identical orbit to Seasat, also at latitudes of between 72 degrees South and 72 degrees North. The orbit was designed to provide high-density measurements over the Earth's surface, at a maximum grid spacing of 2.7 kilometers at the equator and much denser spacing over polar ice sheets. Data were acquired between April 1985 and September 1986.
Initially acquired by the Johns Hopkins APL (Applied Physics Lab) satellite tracking facility, the raw altimetry satellite data from Seasat and GEOSAT were passed on to NASA, via the US Navy. NASA developed slope correction routines for the higher slopes over the ice sheets, relative to ocean surfaces. The data are height profile Level 3 data and gridded height Level 4 data provided by the Oceans and Ice branch of the Laboratory for Hydrospheric Physics of Goddard Space Flight Center. Elevations from the full data rate (i.e., one measurement every 662.5 m) are provided in georeferenced databases. These elevations are relative to the WGS-84 ellipsoid. Gridded elevations at 10-kilometer and 20-kilometer spacing are provided in the gridded data sets created from the GEOSAT and Seasat data, respectively. Software to extract and browse subsets of these data is included. The IAS software also allows the user to view contours created from the gridded data and groundtracks of the full-rate data.VIEW RELATED INFORMATIONhttps://doi.org/10.5067/MTIF60G86H86DocumentationGET DATAhttps://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0053_icesheets_surf_elev_v01/HTTPSVIEW RELATED INFORMATIONhttp://nsidc.org/data/dems/index.htmlPolar Ice Sheet DEMs and Elevation DataUSA/NASACEOS IDN DIFVERSION 9.91997-01-012024-02-26NSIDCVersion SummaryNSIDCMinor VersionNSIDCCurrent Version1NSIDCLevel of ServiceBasicNSIDCFull Dataset Citation1997. <i>Seasat and GEOSAT Altimetry for the Antarctic and Greenland Ice Sheets.</i> [indicate subset used]. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/MTIF60G86H86">https://doi.org/10.5067/MTIF60G86H86</a>. [Date Accessed].NSIDCRetiredfalseNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalseamy.steikermmt_service_12717S1977897447-NSIDCV0NSIDCV05service2022-06-14T16:33:23.589Zhttps://daacdata.apps.nsidc.org/NSIDCV0_DAAC_Data_HTTPS_File_SystemNOT PROVIDED1HTTPS File SystemQuickly download a few files using a web browser, or access the data through a command-line utility such as WGET.https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.orgDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service.DEVELOPERORIGINATORPUBLISHERSERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC Home Pagehttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://daacdata.apps.nsidc.org/pub/DATASETS/nsidc0053_icesheets_surf_elev_v01/