Positioning a vehicle on or above a planetary surface

Apparatus for determining the position of a vehicle on or above a planetary surface, comprising: - a first means (101) for determining a first position P1 (t) of the vehicle, - a second means (102) for determining a moving direction BR (t) of the vehicle, - a third means (103) for providing a number n of fixed point data, the fixed point data indicating their radar signature RS - a radar system (104) having disposed on the vehicle radar sensor for sensing a current environment of the vehicle by means of radar radiation, and for continuously detecting it won radar data, from the radar data wherein the radar system (104) is designed and arranged so that • in the fixed point data depending on the first position P1 (t) from the radar objects FRO