Research On The Back Signal Simulation Of Spaceborne SAR

The methods of Spaceborne SAR simulation for the back signal of the natural ground and sea scene are investigated in the paper. The geometric model of the natural ground scene and the satellite is modeled based on coordinate transition theory. The diorama of natural ground scene is modeled from the DEM data base on fractal theory and facet model. The back signal is given from the models hereinbefore and the RCS matrix which is based on the clutter scattering characteristic model. The moving surface of the ocean is simulated from the ocean wave equation, which is modeled base on the spectrum of the sea. The real time RCS of the sea is given based on the two-scale model and the back signal is also given from the models above. At last, the computer simulation is done for the real DEM data and the simulated sea, and the results prove the effectiveness of the methods.