The colours in this TerraSAR-X radar image of the Kubitzer Bodden, north of Stralsund, tell us how strongly the radar beams emitted were scattered back by the Earth's surface in each polarisation (red: HH, green: VV, blue: HH-VV). This permits the drawing of conclusions about various properties of the backscattering surfaces (e.g. roughness and humidity). Among other things, such information is used to identify different surfaces, such as forests, grain fields or sandbanks. Furthermore, the image yields valuable information about processes that go on above and on the water, such as roughness caused by wind. The stripes that are distinguishable in the Kubitzer Bodden are caused by so-called atmospheric boundary-layer rolls. Such image structures may serve to identify and derive high-resolution wind fields above the water.
Credit: DLR; date: July 7, 2007, 5:24 UTC; original resolution: 3 metres (reduced image); mode: StripMap mode; polarisation: VV and HH