Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry
Entry ID: NSIDC-0076

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Summary
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.

Related URL
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


Link: VIEW RELATED INFORMATION
Description: Polar Ice Sheet DEMs and Elevation Data


Link: VIEW RELATED INFORMATION
Description: GIS Data and Resources at NSIDC


Geographic Coverage
 N: -65.0 S: -81.0  E: 180.0  W: -180.0

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 Center
Online Resource: http://nsidc.org/data/NSIDC-0076


Temporal Coverage
Start Date: 1994-03-01
Stop Date: 1995-05-31


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Data Resolution
Temporal Resolution: 1 day


Science Keywords
CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER ELEVATION/ICE SHEET ELEVATION    [Definition]
TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >GLACIER ELEVATION/ICE SHEET ELEVATION    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY    [Definition]
TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >GLACIER TOPOGRAPHY/ICE SHEET TOPOGRAPHY    [Definition]
CRYOSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS    [Definition]
TERRESTRIAL HYDROSPHERE >GLACIERS/ICE SHEETS >ICE SHEETS    [Definition]
LAND SURFACE >TOPOGRAPHY >SURFACE ROUGHNESS    [Definition]
LAND SURFACE >TOPOGRAPHY >TOPOGRAPHICAL RELIEF    [Definition]


ISO Topic Category
INLAND WATERS
GEOSCIENTIFIC INFORMATION
ELEVATION


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
NSIDC Distributed Active Archive Center    [Information]
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel
Name: NSIDC USER SERVICES
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


National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NSIDC USER SERVICES
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



Distribution
Distribution_Media: FTP
Distribution_Size: 39.6 MB


Personnel
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


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


S. P. GOGENINI
Role: INVESTIGATOR


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


Publications/References
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.

Creation and Review Dates
DIF Creation Date: 2000-01-01
Last DIF Revision Date: 2014-07-16

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