Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry

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Entry ID

NSIDC-0076

Summary

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.

Geographic Coverage

 

Spatial Coordinates:
N: -65°     S: -81°     E: 180°     W: -180°    

Data Set Citation

Dataset 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.html

Temporal Coverage

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

Data Resolution

Temporal Resolution: 1 day

Location Keywords

  • CONTINENT ANTARCTICA

Science Keywords

  • 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

Ancillary Keywords

  • Altimetry
  • Antarctic
  • Antarctica
  • DAAC
  • Dem
  • Digital Elevation Model
  • EOSDIS
  • Ice Sheet Elevation
  • ice sheets
  • NASA
  • NSIDC
  • Surface Elevation
  • Topography

Platform

  • ERS-1 European Remote Sensing Satellite-1
  • SATELLITES

Instrument

  • RA ERS Radar Altimeter
  • RADAR ALTIMETERS

Project

  • EOSDIS Earth Observing System Data Information System
  • ESIP Earth Science Information Partners Program

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

complete

Data Center

NASA DAAC at the National Snow and Ice Data Center
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@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
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@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@bristol.ac.uk
Contact Address:

  • Bristol Glaciology Centre
  • School of Geographical Sciences
  • University Road
  • Bristol, BS8 1SS
  • UNITED KINGDOM

R. L.L. Layberry
Role: INVESTIGATOR

S. P. Gogenini
Role: INVESTIGATOR

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@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

Related URL

VIEW PROJECT HOME PAGE
The Radarsat Antarctic Mapping Project (RAMP)

VIEW RELATED INFORMATION
GIS Data and Resources at NSIDC

VIEW RELATED INFORMATION
Polar Ice Sheet DEMs and Elevation Data

VIEW RELATED INFORMATION
Polar Ice Sheet DEMs and Topographic Data at NSIDC

Reference

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.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 2000-01-01
Last DIF Revision Date: 2013-10-02

Metadata Views

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Directory Interchange Format (DIF) in plain text

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Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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