星载双站SAR地面场景回波仿真

Raw Data Simulation of Ground Scene in Spaceborne Bistatic SAR

双站SAR回波仿真利用小面单元模型和Kirchhoff双站后向散射模型,给出了地面场景后向散射系数的计算方法;为了保证双站SAR精确的相位信息,在时域中模拟双站SAR回波。根据实际的DEM数据进行了计算机仿真,对仿真数据进行成像和干涉处理,结果表明,该方法能够逼真地模拟地面场景的双站散射特性和相位信息。

In bistatic SAR raw data simulation of ground scene, the algorithm of computing bistatic backscatter coefficients of ground scene is discussed with the facet model and Kirchhoff bistatic backscatter model. Raw data simulation is processed in time - domain to maintain accurate phase of bistatic SAR signal. Digital elevation model of real - world is used in computer simulation. After imaging of the raw data and interference processing, the results demonstrate that the bistatic backscatter property and phase information are accurately simulated.