机载双天线InSAR运动补偿误差的影响分析

机载双天线InSAR运动补偿误差的影响分析

内容简介：干涉 SAR 运动补偿是实现高精度机载干涉 SAR 测量的关键.该文针对运动补偿误差对机载双天线干涉SAR 测量的影响进行了详细的分析.首先在参考高程无误差和有误差两种情况下对运动补偿残余误差进行建模;随后分析了无测量误差条件下运动补偿残余误差对干涉相位和平面定位精度的影响;接着分析了存在航迹测量误差和基线测量误差条件下运动补偿残余误差的影响;最后,通过仿真和实测数据实验验证了理论推导的正确性.该文的分析结果为机载双天线干涉SAR系统设计和数据处理提供了理论基础.

Abstract：InSAR motion compensation is a key step to obtain high-precision product. The effect of MOtion COmpensation (MOCO) errors on the precision of airborne dual-antenna InSAR is analysed. First, the MOCO residual errors are deduced on condition that the referenced DEM (Digital Elevation Model) is accurate or not, respectively. Next, the effects of MOCO errors on the interferometric phase and plane location are analyzed without measurement errors considered. Then the effects resulted from trajectory measurement errors and baseline measurement errors are presented. Finally, the accuracy of the theoretical deduction is verified with simulation and real data. The research provides theoretical bases for the system design and signal processing of airborne dual-antenna InSAR.

作者：李芳芳*, 仇晓兰, 孟大地, 胡东辉, 丁赤飚,

关键词：机载InSAR, 运动补偿, 残余误差, 干涉相位, 平面定位,