分布式卫星InSAR系统基线转换精度分析

Analysis of Baseline Conversion Accuracy in Distributed Satellite InSAR System

在研究分布式卫星干涉合成孔径雷达(InSAR)系统空间几何关系模型的基础上,区分出测量基线、修正基线和干涉基线,提出了从测量基线到修正基线的转换方法,并且分析了分布式卫星InSAR系统测量基线到修正基线转换的主要误差源全球定位系统(GPS)测量误差与部位修正误差。通过计算机仿真分析,得出了GPS双频测量误差占主导,部位修正误差对基线测量精度影响也不可忽略的结论。该结论对分布式卫星InSAR系统的设计与优化具有重要的指导意义。

In this paper, based on the spatial relation model of the distributed satellite interferometric synthetic aperture radar（InSAR） system, distinguished measured baseline, corrected baseline and interferometric baseline, proposed a transfer method, the main error sources of the baseline transfer are analyzed. The sources include GPS measurement error and parts-amendment error. Finally through computer simulation, two important conclusions are obtained, Corrected baseline error main affect by measure baseline, meanwhile parts-amendment error can＇t neglected. Furthermore the conclusions have great guiding significance on the design and optimization of the distributed satellite SAR system.