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Ice Validation chain for radar altimetry

The OSCAR project intend to maintain and develop the use of satellite radar altimetry over continental surfaces. Here we show the processing chain that has been developed at LEGOS and which we use to qualify the ENVISAT and ERS data. The validation is based on a crossover analysis. We will show the steps of the validation process, the results on various parameters, like height, but also backscatter, leading edge and trailing edge of the waveforms. The validation process allows us to deliver reports, but also a validation table which is available on our website as well as other meta product. The validation table gives for each track of each cycle a validity flag and a qualifying flag giving the reason of rejection if necessary. The waveform parameters as well as the geophysical and instrumental corrections are checked during the validation process. Over ice caps further echo and geographic corrections are computed which allows surveying the altimetric accuracy with time, area, surface slope.
Ice Validation chain for radar altimetry
Proceeding of the ESA Living Planet Symposium, 28 June – 2 July 2010, Bergen, Norway
Ice validation chain
Poster of the ESA Living Planet Symposium, 28 June – 2 July 2010, Bergen, Norway