采用变长度空间变换对相移法做了推广,引入了一种适应适中横向速度变化情况的偏移算法。该处理方法大大降低了数据下行延拓所需的水平波数,并用简单的递归关系代替了空间快速傅氏变换。对给定的 The variable length space transformation is used to generalize the phase shift method, and an offset algorithm that adapts to the change of moderate lateral velocity is introduced. This method greatly reduces the horizontal wave number needed for data downlink extension and replaces the fast Fourier transform with a simple recursive relation. For given