Dr. Gabriele Schwaizer from ENVEO lectured on "SAR/Optical Applications to Ice and Snow" at the 9th ESA Training on Radar and Optical Remote Sensing in Vilnius, Lithuania. In the associated practical training, the participants gained experience on the generation of wet snow maps from Sentinel-1 C-SAR data, and of binary as well as fractional snow extent mapping from Sentinel-2 MSI data.