About the SRAL
The dual-frequency Synthetic Aperture Radar Altimeter (SRAL) on board Sentinel-3 will provide sea surface topography measurements in “SAR mode”, i.e. with a spatial resolution as narrow as 300 m.
SRAL is supported by a microwave radiometer for atmospheric correction and by a DORIS receiver, Global Navigation Satellite System, and laser retroreflector to determine its position in space with pinpoint accuracy.
The SRAL will be used to determine sea and lake surface height, significant wave height, surface wind speed, and sea ice height and thickness.