Feasibility of Air Target Detection Using GPS as a Bistatic Radar

Abstract. The feasibility of using GPS as a bistatic radar illuminator for the purposes of air target detection is examined. The power budget analysis is first performed assuming the use of a single satellite, but is followed by a discussion of the expected improvements when multiple satellites are employed. The analysis includes the effect of GPS signal strength dynamic range, also known as the ‘near-far ’ problem. The difference between the radar cross-section (RCS) of a typical air target and ground-based clutter reflections is discussed, followed by an estimation of the effect of ground clutter on the operation of such a system.