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 is added to image the different point targets, and the distance migration curve before and after the distance migration compensation and the position of the final point target are displayed.)