Radar remote sensing is a technique that allows remote and cost efficient observation of natural environments and is thus an important tool to observe uninhabited regions such as the Arctic. However, the radar images are not easy to interpret, since the radar signal is influenced by various factors such as the soil and vegetation water content as well as the structure of the surface, for example if the surface is smooth or rough, and if herbs and grasses or woody vegetation is on top. Thus, we have to compare in situ field data with the satellite data to "translate" the signal to environmental information.