Abstract
Six months of processed ERS-1 full waveform altimetry data have been used to study the ERS-1 altimeter performance over the Greenland ice sheet. Surface profiles from repeated ground tracks have been studied to explain the character of the data and the performance of several waveform processing techniques. A cross-over analysis has been performed to assess the repeatability of retracked data. The RMS of ocean-mode cross-over differences is found to be around 0.5 m for most parts of the central ice sheet, with values larger than 2 m for areas with large variations in surface height. For these areas the ice mode cross-over differences are smaller. Average waveforms from the central part of the ice sheet show the presence of substantial sub-surface volume scattering.
Published Version
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