CryoSat-2 multiple waveform retracking over inland waters

Heidi Villadsen (DTU Space, Denmark)


Ole Andersen (DTU Space, Denmark); Lars Stenseng (DTU Space, Denmark); Karina Nielsen (DTU Space, Denmark); Per Knudsen (DTU Space, Denmark)

Event: 2014 Ocean Surface Topography Science Team Meeting

Session: Instrument Processing: Measurement and retracking (SAR and LRM)

Presentation type: Type Poster

The high along track resolution of the SIRAL altimeter carried on-board CryoSat-2 offers a wide range of unique opportunities for satellite monitoring. This study focuses on the ability of CryoSat-2 to estimate elevations of inland water bodies, which were previously too small to be monitored by satellite altimeters. With the high resolution of the SIRAL altimeter even small water bodies will be detectable, however, surrounding topography and the high number of different surface types within the satellite footprint often give rise to complicated waveforms, which can be difficult to retrack correctly.

By developing a retracking method that looks at contiguous waveforms simultaneously the contamination from off-nadir returns can be reduced and a more accurate water level can be obtained.
This study focuses on multiple waveform retracking of CryoSat-2 SAR data, however, this method will be applicable to other modes and missions, such as the upcoming Sentinel-3 mission.

Heidi Villadsen
DTU Space