Research on Imaging Algorithms for Bistatic System of Geosynchronous SAR Based on Stationary Motion Mode

摘要

The geosynchronous orbit SAR system (GEOSAR) can monitor a certain area for a long time. It has the advantages of short revisit cycle and strong anti-attack ability. It has wide application prospect and development potential in military and civil fields. But at the same time, the time variability of the atmosphere in the long synthetic aperture affects the focusing performance of the L-band GEOSAR, and its antenna size, power consumption, and the cost of launching are also greatly limited to the engineering implementation of the radar. In order to solve the above problem, this paper derives the imaging algorithm of the double-base stationary motion model based on the concept of the binary radar system (GEO-UAV SAR) of the star machine hybrid system (GEO-UAV SAR) received by GEOSAR and carries out the simulation test. The basic theoretical model is put forward for the research of the imaging algorithm in the nonstationary state, and the development of the test star is made. And construction provides a basic theoretical research result.