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中文摘要：
进行沿航向运动补偿后SAR图像存在几何形变．影响于图像拼接和多波段SAR图像融合．对沿航向运动补偿后的几何形变量进行了推导。提出一种校正沿航向运动补偿后几何形变的方法．该方法利用多普勒调频率的扰动项构造相位补偿函数进行运动补偿。根据多普勒调频率计算目标在理想情况下的位置．以及经过沿航向运动补偿后相对理想情况的位置偏移量，对SAR图像插值完成几何形变校正．采用仿真和实测多波段数据验证该方法的有效性．
英文摘要：
A loss of geometric accuracy of SAR images will occur after the along-track motion compensation. As a result, the sub-image connection and the multi-hand image fusion will become difficult. In this paper, the expression of the geometric distortion after the along-track motion compensation is derived. Then a method is presemed for geometric distortion correction. Firstly, the along-track motion error is compensated by applying the phase compensation function. Secondly, the position and the position shift of the target are determined according to the Dopp｜er rate cstiamted. Lastly, the SAR image is interpolated. Simulated data real multi-band data are used to validate this method.
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