The images acquired with the radar satellite TerraSAR-X show, for the first time, the Frisian islands of Borkum to Wangerooge, including the cities of Wilhelmshaven and Bremen, at a single point in time and in high resolution. The scientists at the German Aerospace Center (DLR) examine these images to study, for example, tidal range, changes in the Wadden Sea, waves, or even wind levels.