分布式小卫星干涉高程测量

干涉仪合成孔径雷达 (InSAR)可以对地面高程进行有效测量 ,产生高精度的地面数字高度模型 ,具有广阔的应用前景。编队飞行的小卫星星座技术具有许多优点 ,可以提供高精度测高所需的较长的有效基线 ,却不能提供完全平行的航迹。针对这个问题 ,分析了小卫星星座的实际轨道情况 ,提出两种信号处理方法 ,可以有效解决非平行航迹的干涉测高问题。理论分析和仿真结果证实了这两种方法的有效性。

Interferometric measurement of terrain elevation with distributed micro-satellites

InSAR is designed to measure high precision digital elevation models (DEMs) of terrain which has many applications. Formation-flying constellation of micro-satellites has many advantages. It can provide the baseline with enough length but can not give parallel flying tracks. In this paper, the non-parallelism of flying tracks is analyzed and two methods are proposed to obtain the precise DEM. Simulations show the validity of these methods.