Abstract:

The concept and theory of geosynchronous synthetic aperture radar (GEOSAR) are introduced, and the parameter design of GEOSAR is focused on, using the characteristics of short period and real-time processing in the application of ground information remote sensing. Much effort is given to analyse the track of satellites relative to the earth and the area of irradiation in strip-mode. The influence of orbit and attitude of the satellite on the squint angle and Doppler center is analyzed and computed theoretically. Based on the position of China, a group of effective parameters of radars are designed. In the GEOSAR imaging processing, the range-Doppler algorithm and the back-projection algorithm are respectively compared by using simulated data. Simulation results verify the feasibility and superiority of the approach.