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Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry Entry ID: NSIDC-0076 |
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Summary
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Abstract:
This data set provides a digital elevation model (DEM) for Antarctica to 81.5 degrees south latitude, at a resolution of 5 km. Approximately twenty million data points were used to generate this data set. Data points were derived from ERS-1 radar altimetry during the geodetic phase from March 1994 to May 1995. The improved density in coverage and resolution, compared with past satellite altimetry missions, provides better detection of topographic detail such as surface undulations, ice streams, grounding zones, and interstream ridges. DEM data are in a polar stereographic projection with the origin at the south pole, and are referenced to the OSU91A geoid. The ERS-1 satellite radar altimeter measurements are highly useful for determining precise ice sheet elevations in Antarctica. The orthometric heights derived from the ERS-1 data contribute to a more accurate and complete mapping of the Antarctic Ice Sheets than previously possible, and therefore to ongoing studies of ice mass balance studies in Antarctica. The DEM is provided as a single ASCII text file, accessible by ftp. Data access is unrestricted, but we recommend that users register with us. Registered users automatically receive e-mail notification of product updates and changes to processing.
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Related URL
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Link:
GET DATA
Description: FTP site for obtaining these data. Link: GET DATA > ECHO Description: Refine your granule search with ECHO's next generation Earth Science discovery tool (Reverb) using information from this record. Link: GET SERVICE > GET WEB MAP SERVICE (WMS) Description: Access these data as map images using the Open Geospatial Consortium (OGC) Web Map Service (WMS). Link: GET SERVICE > GET WEB FEATURE SERVICE (WFS) Description: Access these contours of these data in Geography Markup Language (GML) using the Open Geospatial Consortium (OGC) Web Feature Service (WFS). Link: GET SERVICE > GET WEB COVERAGE SERVICE (WCS) Description: Access these data in GeoTIFF format using the Open Geospatial Consortium (OGC) Web Coverage Service (WCS). Link: GET SERVICE > ACCESS MAP VIEWER Description: View these and other data in NSIDC's Antarctic Cryosphere Access Portal (A-CAP) online map viewer. Link: VIEW PROJECT HOME PAGE Description: The Radarsat Antarctic Mapping Project (RAMP) Link: VIEW RELATED INFORMATION Description: Polar Ice Sheet DEMs and Topographic Data at NSIDC |
Geographic Coverage
| N: -65.0 | S: -81.0 | E: 180.0 | W: -180.0 |
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Data Set Citation
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Dataset Originator/Creator:
Jonathan Bamber
Dataset Title: Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry Dataset Release Date: 2000-01-01 Dataset Release Place: Boulder, CO U.S.A. Dataset Publisher: National Snow and Ice Data Center (NSIDC) Online Resource: http://nsidc.org/data/nsidc-0076.html |
Temporal Coverage
| Start Date: 1994-03-01 |
| Stop Date: 1995-05-31 |
Location Keywords
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CONTINENT
> ANTARCTICA
GEOGRAPHIC REGION > POLAR |
Data Resolution
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Temporal Resolution:
Daily
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Science Keywords
| CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS [Definition] |
| TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS [Definition] |
| LAND SURFACE >TOPOGRAPHY >TOPOGRAPHICAL RELIEF [Definition] |
| LAND SURFACE >TOPOGRAPHY >SURFACE ROUGHNESS [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY [Definition] |
| CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER ELEVATION/ICE SHEET ELEVATION [Definition] |
| TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY [Definition] |
| TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >GLACIER ELEVATION/ICE SHEET ELEVATION [Definition] |
ISO Topic Category
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ELEVATION
GEOSCIENTIFIC INFORMATION INLAND WATERS |
Platform
| ERS-1 >European Remote Sensing Satellite-1 [Information] |
| SATELLITES [Information] |
Instrument
| RA >ERS Radar Altimeter [Information] |
| Radar Altimeters [Information] |
Project
| EOSDIS >Earth Observing System Data Information System [Information] |
| ESIP >Earth Science Information Partners Program [Information] |
Quality
| Various methods were applied to improve the accuracy of elevation estimates over the Antarctic ice sheet, including waveform tracking, slope correction, data filtering (tests for return-echo waveform shape, backscatter coefficient, and retracking correction values for each altimeter height estimate), and removal of anomalous orbits. |
Keywords
| Altimetry |
| Antarctic |
| Antarctica |
| DAAC |
| Dem |
| Digital Elevation Model |
| EOSDIS |
| Ice Sheet Elevation |
| ice sheets |
| NASA |
| NSIDC |
| Surface Elevation |
| Topography |
Data Set Progress
| COMPLETE |
Data Center
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NSIDC Distributed Active Archive Center
[Information]
Data Center URL: http://nsidc.org/daac/index.html Dataset ID: NSIDC-0076
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National Snow and Ice Data Center
[Information]
Data Center URL: http://nsidc.org Dataset ID: NSIDC-0076
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Distribution
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Distribution_Media:
FTP
Distribution_Size: 39.6 MB uncompressed Distribution_Format: ASCII |
Personnel
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JONATHAN
BAMBER Role: INVESTIGATOR Email: j.l.bamber at bristol.ac.uk Contact Address: Bristol Glaciology Centre School of Geographical Sciences University Road City: Bristol Postal Code: BS8 1SS Country: United Kingdom |
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RUSSELL
L. L.
LAYBERRY Role: INVESTIGATOR Email: R.Layberry at susx.ac.uk Contact Address: School of Chemistry Physics and Environmental Science University of Sussex City: Falmer Province or State: Brighton Country: UK |
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S.
P.
GOGENINI Role: INVESTIGATOR |
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NSIDC
USER SERVICES Role: TECHNICAL CONTACT Phone: +1 (303) 492-6199 Fax: +1 (303) 492-2468 Email: nsidc at nsidc.org Contact Address: National Snow and Ice Data Center CIRES, 449 UCB University of Colorado City: Boulder Province or State: CO Postal Code: 80309-0449 Country: USA |
Creation and Review Dates
DIF Creation Date:
2003-06-26
Last DIF Revision Date:
2012-12-20
Future DIF Review Date:
2004-06-24
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