The Sea Ice Radar Altimetry (SIRAL) project of the Alfred Wegener Institute (AWI) is based on satellite radar altimetry data to investigate the sea ice mass balance and related processes to understand Arctic Change. SIRAL is also the name of the name of the radar altimeter onboard CryoSat-2


Please check the CS2SMOS wiki for information on merged CryoSat-2/SMOS sea ice thickness data.

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New & Updates

The AWI CryoSat-2 sea ice product has been updated to version 2.1 in October 2018 for the entire CryoSat-2 data period (2010 - ongoing). The previous version 2.0 is discontinued.

See Whats new in version 2.1.


This section provide information on available sea ice thickness data sets produced at the Alfred Wegener Institute.

Technical information on data set content and usage




SIRAL Blog

News and updates to CryoSat-2 sea ice products: