Entry_ID: NSIDC-0076
Entry_Title: Antarctic 5-km Digital Elevation Model from ERS-1 Altimetry
Group: 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
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Jonathan
   Last_Name: Bamber
   Email: j.l.bamber@bristol.ac.uk
   Group: Contact_Address
      Address: Bristol Glaciology Centre
      Address: School of Geographical Sciences
      Address: University Road
      Address: Bristol, BS8 1SS
      Address: UNITED KINGDOM
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: R.
   Middle_Name: L.L.
   Last_Name: Layberry
End_Group
Group: Personnel
   Role: Investigator
   First_Name: S.
   Middle_Name: P.
   Last_Name: Gogenini
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Elevation/Ice Sheet Elevation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Topography/Ice Sheet Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Topography
   Variable_Level_1: Surface Roughness
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Land Surface
   Term: Topography
   Variable_Level_1: Topographical Relief
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Elevation/Ice Sheet Elevation
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Glacier Topography/Ice Sheet Topography
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Glaciers/Ice Sheets
   Variable_Level_1: Ice Sheets
End_Group
Keyword: Altimetry
Keyword: Antarctic
Keyword: Antarctica
Keyword: DAAC
Keyword: Dem
Keyword: Digital Elevation Model
Keyword: EOSDIS
Keyword: Ice Sheet Elevation
Keyword: ice sheets
Keyword: NASA
Keyword: NSIDC
Keyword: Surface Elevation
Keyword: Topography
Sensor_Name: RA > ERS Radar Altimeter
Sensor_Name: RADAR ALTIMETERS
Source_Name: ERS-1 > European Remote Sensing Satellite-1
Source_Name: SATELLITES
Group: Temporal_Coverage
   Start_Date: 1994-03-01
   Stop_Date: 1995-05-31
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -81
   Northernmost_Latitude: -65
   Westernmost_Longitude: -180
   Easternmost_Longitude: 180
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Data_Resolution
   Temporal_Resolution: 1 day
End_Group
Project: EOSDIS > Earth Observing System Data Information System
Project: ESIP > Earth Science Information Partners Program
Group: 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.

End_Group
Data_Set_Language: English
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 39.6 MB
End_Group
Group: 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.

End_Group
Group: 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.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/radarsat/index.html
   Description: The Radarsat Antarctic Mapping Project (RAMP)
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/gis/index.html
   Description: GIS Data and Resources at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/dems/index.html
   Description: Polar Ice Sheet DEMs and Elevation Data
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW RELATED INFORMATION
   End_Group
   URL: http://nsidc.org/data/dems/index.html
   Description: Polar Ice Sheet DEMs and Topographic Data at NSIDC
End_Group
IDN_Node: USA/NASA
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2000-01-01
Last_DIF_Revision_Date: 2013-10-02
DIF_Revision_History: Fixed data access links for Search.