星载InSAR空间基线的系统设计与性能分析

基线在星载InSAR的系统设计和数据处理中起着非常重要的作用，它决定了InSAR数据处理的可能性和精度。该文对星载InSAR的空间基线进行了详细的分析，推导了星载InSAR的空间极限基线和最优基线的公式，讨论了空间基线的设计，论证了最优基线的存在。文中进行了计算机仿真实验，仿真结果与实际系统所用基线基本吻合。文中还使用空间基线去相干系数、高程模糊数和目标高程估计方差这三个重要指标对三个星载SAR系统进行分析。结果显示实际系统设计的基线距是比较合理的。

System Design and Performance Analysis of Spatial Baseline in Spaceborne InSAR

Baseline is very important for spaceborne interferometric SAR system design and data processing. In this paper, spatial baseline in spaceborne interferometric SAR is analyzed in details. The equations to determine the critical baseline and the optimal baseline are deduced, and the existence of an optimal baseline is demonstrated. Finally, the results of computer simulation are presented to testify the correctness of the analysis. The simulated results confirm the real parameters. The effects of some system's and geometric parameters on the critical baseline and the optimal baseline are discussed also.