中文说明：SAR成像算法，基于弧形几何的RD算法。区别于传统的SAR成像算法，这种能够在分析特殊斜距状态下的回波方程实现目标的聚焦。
English Description：
SAR imaging algorithm, RD algorithm based on arc geometry. Different from the traditional SAR imaging algorithm, this algorithm can focus the target by analyzing the echo equation in the special oblique range state.