不徙
不徙-
BP算法由于用时延代替了相位的概念，故与频率无关，不存在距离徙动校正的问题。
BP algorithm replaces the concept of phase with delay time , so it is irrelevant to frequency and the problem of range migration correction does not exist .
-
该算法的运算量不随距离徙动量的增大而增加，适合于大距离徙动量的星载SAR数据快视成像。
The computation amount of this algorithm will not change with the increase of the range migration , so it is quite suitable to process the space-borne SAR echo data with large range migrations .