中文说明：本程序为进行频域距离徙动校正的RD算法，普通的RD算法（距离——多普勒）在距离压缩后，直接进行方位向压缩，没有消除二维耦合，当频率较低，或是合成孔径较长时，二维耦合严重，这时普通的RD算法将不再试用，于是考虑在频域进行距离徙动校正
English Description：
This program for for frequency domain distance migration moving correction of RD algorithm, General of RD algorithm (distance--more general Le) in distance compression Hou, directly for azimuth to compression, no elimination II dimension coupled, dang frequency lower, or synthesis aperture more long Shi, II dimension coupled serious, then General of RD algorithm will no longer trial, so consider in frequency domain for distance migration moving correction