Precise Position Capture With Radar Satellites

Abstract

For applications in which an in-situ GNSS measurement is not possible, too laborious or too cumbersome, modern remote sensing with radar satellites offers a solution. With the help of at least two radar images from the TerraSAR-X or TanDEM-X satellite and the corresponding data processing, it is possible to obtain position information with accuracy in the sub-decimeter range. As a result, a measurement on site is no longer necessary, but can be carried out with the satellites remotely and worldwide. The applications are in the area of geodetic measuring networks and as ground control points for the perfect registration of aerial and satellite images as well as reference points for landmark navigation. However, it must be emphasized that only the position of objects that have a particular radar signature can be determined. These are for example masts of signs, traffic lights or light poles. The 3D-coordinates of the foot point are determined.