Downloaded September 2012 from
http://nsidc.org/data/docs/daac/nsidc0422_antarctic_1km_dem/index.html
ftp://sidads.colorado.edu/pub/DATASETS/DEM/nsidc0422_antarctic_1km_dem/

Downloaded file:
krigged_dem_nsidc.bin

For information on user restrictions, please visit
http://nsidc.org/about/use_copyright.html

This page is also available offline in this folder, but note that terms might have changed since data download.