[Parameters: Topic='CRYOSPHERE', Term='GLACIERS/ICE SHEETS', Variable_Level_1='GLACIER ELEVATION/ICE SHEET ELEVATION']
Antarctic 1 km Digital Elevation Model (DEM) from Combined ERS-1 Radar and ICESat Laser Satellite AltimetryEntry ID: NSIDC-0422
Abstract: This data set provides a 1 km resolution Digital Elevation Model (DEM) of Antarctica. The DEM combines measurements from the European Remote Sensing Satellite-1 (ERS-1) Satellite Radar Altimeter (SRA) and the Ice, Cloud, and land Elevation Satellite (ICESat) Geosciences Laser Altimeter System (GLAS). The ERS-1 data are from two long repeat cycles of 168 days initiated in March 1994, and the GLAS data are from 20 February 2003 through 21 March 2008. The data set is approximately 240 MB comprised of two gridded binary files and two Environment for Visualizing Images (ENVI) header files viewable using ENVI or other similar software packages. The data are available via FTP.
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Start Date: 2002-10-30Stop Date: 2002-11-26
Quality Equipment modifications
Several modifications were made to the extrusion gravity corer during the sampling season. Before commencing the sampling, the corer was stripped down and cleaned as several components, including the spring and cocking device were corroding, and therefore not functioning efficiently. Seals were also replaced and lubricated. Some tools and spare parts should be ... included in the box for future field use.
During one deployment, it was found that the cocking device was not releasing and a pin from one arm of the device was missing. As a temporary measure, this was replaced in the field with a piece of binding from a spiral bound notebook and will need to be replaced before next field use.
The rope on the corer was of an open weave type and hence tended to swell easily once it was wet. In below freezing conditions, this caused several problems and often stopped the weight sliding down the rope to trigger the mechanism. The rope was replaced with a length of tightly woven, very strong climbing rope called Spectra. (Spectra rope typically has the breaking strain of rope twice its diameter, i.e. 6mm same as 11 or 12 mm rope but also has a very tightly woven sheath). It is water repellent (i.e. ever dry construction) so tends not to swell and expand when immersed in water, and costs about $3 per metre.
Access Constraints A summary of the locations data were sampled from is available for download from the url given below.
Use Constraints This data set conforms to the PICCCBY Attribution License
Data Set Progress
Distribution Media: HTTP
Distribution Size: 1 kb
Distribution Format: csv
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 3 6226 2428
Fax: +61 3 6226 2973
Email: D.Roberts at utas.edu.au
IASOS GPO BOX 252-77 University of Tasmania
Province or State: Tasmania
Postal Code: 7001
Creation and Review Dates
DIF Creation Date: 2002-07-02
Last DIF Revision Date: 2008-04-10