Antarctic 5-km Digital Elevation Model from ERS-1 AltimetryEntry ID: NSIDC-0076
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.
Data Set Citation
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, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data CenterOnline Resource: http://nsidc.org/data/nsidc-0076.html
Start Date: 1994-03-01Stop Date: 1995-05-31
Temporal Resolution: 1 day
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION
CRYOSPHERE > GLACIERS/ICE SHEETS > GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY
CRYOSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
LAND SURFACE > TOPOGRAPHY > SURFACE ROUGHNESS
LAND SURFACE > TOPOGRAPHY > TOPOGRAPHICAL RELIEF
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER ELEVATION/ICE SHEET ELEVATION
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY
TERRESTRIAL HYDROSPHERE > GLACIERS/ICE SHEETS > ICE SHEETS
ISO Topic Category
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.
Data Set Progress
Distribution Media: FTP
Distribution Size: 39.6 MB
Email: j.l.bamber at bristol.ac.uk
Bristol Glaciology Centre School of Geographical Sciences University Road
Postal Code: BS8 1SS
Country: United Kingdom
Email: R.Layberry at susx.ac.uk
School of Chemistry Physics and Environmental Science University of Sussex
Province or State: Brighton
Role: TECHNICAL CONTACT
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at nsidc.org
National Snow and Ice Data Center CIRES, 449 UCB University of Colorado
Province or State: CO
Postal Code: 80309-0449
Bamber, J.L. and R.A. Bindschadler. 1997. An improved elevation dataset for climate and ice-sheet modelling: validation with satellite imagery. Annals of Glaciology 25:438-444.
Bamber, J.L. and P. Huybrechts. 1996. Geometric boundary conditions for modelling the velocity field of the Antarctic ice sheet. Annals of Glaciology 23:364-373.
Bamber, J. and C. Bentley. 1994. A comparison of ... satellite-altimetry and ice-thickness measurements of the Ross Ice Shelf, Antarctica. Annals of Glaciology 20:357-364.
Bamber, J. 1994. A digital elevation model of the Antarctic ice sheet derived from ERS-1 altimeter data and comparison with terrestrial measurements. Annals of Glaciology 20:48-54.
Bamber, J. 1994. Ice sheet altimeter processing scheme. International Journal of Remote Sensing 15:925-938.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-01-01
Last DIF Revision Date: 2013-08-15