此代码为合成孔径雷达成像的算法，是最基本的距离多普勒算法，其中加入了距离徙动的补偿，对不同的点目标进行成像，同时显示了距离徙动补偿前后的距离徙动曲线的图，和最后点目标的位置。(This code is the algorithm of synthetic aperture radar imaging. It is the most basic distance Doppler algorithm, in which the compensation of distance migration i