分布式小卫星系统沿航迹干涉SAR测速去模糊方法

Deblurring of Speed-Measure of the Along-Track INSAR in the Cluster Micro-Satellite System

本文结合分布式小卫星系统的多基线结构阐述了沿航迹干涉SAR(Along-Track Interferometric SAR)测速的解模糊问题,提出利用多个卫星的干涉相位信息去除沿航迹干涉SAR的测速模糊。以往单颗卫星作SAR-GMTI时,用固定长度基线的双天线作动目标检测总会遇到速度模糊问题,而此问题在分布式系统中多基线组合情况下则迎刃而解。本文还分析了小卫星编队立体队形及地球自转等因素下的动目标测速去模糊。

This paper describe a deblurring method of speed-measure of the Along-Trade INSAR by the construct of multi-baseline in the Cluster Micro-Satellite System. By the interferometric information from the cluster satellites the speed of ground moving target can be calculated without blurring. We know that one satellite was always facing speed-measure blurring when being on SAR-GMTI, by the reason that baseline length is fixed. Now the baffle from baseline's is no longer there when cluster satellites system runs. We also discuss the respects of the formation of satellites and the earth's autorotation.