Abstract
TerraSAR-X/PAMIR experiment is a spaceborne/airborne hybrid bistatic synthetic aperture radar experiment carried out by a cooperation of FGAN/FHR, ZESS and DLR. The acquisition of the accurate position, attitude and velocity information is a prerequisite to obtain the high-quality bistatic SAR image. The position and velocity parameters can be obtained using differential GPS technique, and the attitude information can be gained from an on-board multi-antenna GPS system. Our study addresses the feasibility of using GPS technique for achieving the accuracy requirement of motion compensation. The relation between the parameters obtained from GPS and the parameters needed for the motion compensation will be first established, and then the corresponding error analysis is carried out to assess the accuracy of parameters related to the motion compensation. Based on the numerical results, we will also propose a proper choice of the GPS devices and the configuration of the multi-antenna GPS system. Nomenclature l T = look angle DCF f = Doppler centroid frequency
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