斜视情况下的分布式卫星InSAR处理方法

摘要

According to the presence of a squint angle for distributed satellites interferometric synthetic aperture radar (InSAR) , this paper analyzes the effects on InSAR data processing. This effect, if not compensated, imposes strong limits on the performance of the SAR interferometry. Based on the analysis, this paper proposes new compensating techniques to mitigate the effects by displacing the SAR imaging Doppler center and implementing linear phase compensation, thus improving the accuracy of digital elevation model (DEM). The proposed method is simple to implement and efficient. In the end, the computer simulation results verify the analysis and validity of the method%基于分布式卫星编队合成孔径雷达(synthetic aperture radar,SAR)实现对地干涉测量存在斜视的情况,分析了斜视角对分布式卫星干涉合成孔径雷达(interferometic SAR,InSAR)地面数据处理的影响,并在此基础上提出通过偏置成像多普勒中心和对成像结果进行线性相位补偿,能够有效减小甚至消除此影响,进而提高数字高程模型的精度.这种方法具有简单和高效的优点.最后,计算机仿真结果验证了本文分析的正确性和方法的有效性.