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SGDR products provide averaged waveforms (at 18 Hz), individual waveforms (at 1800 Hz) and Geophysical Data Records using the best restituted auxiliary data (meteorological fields, solar activity indexes, pole location, platform data, DORIS ionospheric data) and a DORIS precise orbit.
The product is re-tracked (waveform data are fully processed in the ground processor to extract the geophysical parameters) and mainly contains datation, geo-location, output from re-trackers (ie range, wind speed, significant wave height, etc.), at 1 Hz plus some 18 Hz parameters (range, orbital altitude). In order to retrieve the geophysical parameters over all types of surface (ocean, ice, sea-ice, etc.), four specialised re-trackers are continuously run in parallel (over all surfaces): Ocean re-tracker, Ice-1 re-tracker, Ice-2 re-tracker and Sea-Ice re-tracker.
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