分布式小卫星SAR的基线测量方法研究

Research on Baseline Measurement Methods of Distributed Small Satellite SAR

星间基线的高精度测量是分布式小卫星合成孔径雷达（SAR）的重点问题之一。本文以星间基线的表示为出发点，先筛选出可行的基线测量手段，然后针对分布式小卫星SAR所关心的测量精度、信号覆盖、数据率以及作用距离等方面，对这几种手段作进一步的比较分析，并根据比较的结果，提出了3种理论上可行的基线测量方案。最后，文章还指出了这些方案在工程实现过程中需要进一步解决的问题。

High precision inter-satellite baseline measurement is one of the most important issues for distributed small satellite SAR （DSS-SAR）. Based on the description of the baseline, this paper first screens out some feasible baseline measurement means. Then, it compares and analyses several typical measurement methods of relative state aiming at measurement precision, signal coverage, data rate and effective range concerning DSS-SAR. On the basis of the results, the paper proposes three baseline measurement methods. Finally, the paper also points out some problems that need to be solved in engineering and implementation.