分布式InSAR测高的基线测量精度指标分析

Analysis of Baseline Precision Requirement to Distributed InSAR for Altitude Measurement

基线是分布式星载干涉SAR中的重要参数。从分布式InSAR测高的基本原理出发,推导了基线对InSAR测高影响的误差传递公式;然后结合基线的测量原理,提出了合理的基线测量精度指标;进而给出了由测高精度指标反演基线测量的精度指标的方法;仿真结果验证了其精度指标反演方法的正确性。

Baseline is an important parameter in Distributed Spaceborne Interferometric SAR （ InSAR ）. In this paper, error transfer formula for baseline effect on altitude measurement precision is derived from the basic principles of InSAR, and then baseline precision requirement is presented according to the principle of baseline measurement. Furthermore, reverse analysis method for obtaining precision requirement from altitude measurement for baseline measurement is given. Finally, computer simulations show the validity of this method.