Ambiguity Assessment and Mitigation Approaches for the TerraSAR-X Concurrent Imaging Technique

Abstract:
For TerraSAR-X, the concurrent imaging technique enables the simultaneous acquisition of scenes in two different modes and over two disjoint areas. The acquisition scheme exploits the capability to toggle the antenna configuration from pulse to pulse. A direct consequence of this interleaved acquisition scheme is the necessity to increase the azimuth sampling rate. This, in turn, affects the ambiguity performance. The paper at hand analyzes the range and azimuth ambiguity performance of the concurrent imaging technique and describes approaches to mitigate the impact of ambiguities. Additionally, the approaches are confirmed by experimental acquisitions conducted with TerraSAR-X.