Ice sheet topography from retracked ERS-1 altimetryAn objective of the ERS-1 radar altimeter is to measure the surface topography of the polar ice sheets to a precision on the order of a meter. ERS-1 Waveform Altimeter Product (WAP) data was corrected for several processing errors. A range correction from the WAP waveforms, using the multiparameter retracking algorithm to account for range tracking limitations inherent to radar altimetry, was derived. From crossover analysis, the resulting precision is shown to be about 2.1 m in ocean mode and 2.2 m in ice mode. A topography map, produced with 23 days of corrected data, shows details of the western part of west Antarctic ice sheet and part of the Ross ice shelf including ice divides, ice stream boundaries, and ice shelf grounding lines.
Zwally, H. Jay (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Brenner, Anita C. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Dimarzio, John (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Seiss, Timothy (NASA Goddard Space Flight Center Greenbelt, MD, United States)
August 16, 2013
January 1, 1994
Publication: ESA, Proceedings of the Second ERS-1 Symposium on Space at the Service of Our Environment, Volume 1