中文说明：经典SAR成像中RD算法点目标仿真，包括目标信息，回波信号仿真，然后距离压缩，距离徙动矫正，方位压缩，最后成像。
English Description：
In classical SAR imaging, RD algorithm point target simulation includes target information, echo signal simulation, range compression, range migration correction, azimuth compression, and finally imaging.