分布式卫星InSAR系统的DEM定位方法  

Research on DEM calculation for distributed satellite InSAR system

作　　者：张奔[1] 郑坚[1] 茅宁杰[1] 刘艳阳[2] 

机构地区：[1]中国电子科技集团公司第二十八研究所,江苏南京210007 [2]上海卫星工程研究所,上海200240

出　　处：《武汉大学学报（工学版）》2015年第6期852-856,共5页Engineering Journal of Wuhan University

摘　　要：分析给出了分布式编队卫星干涉合成孔径雷达(Interferometric Synthetic Aperture Radar,InSAR)系统一发多收及自发自收工作模式下的目标定位方程,成功将经典Mora方程应用于分布式编队卫星InSAR系统原始数字高程模型DEM(Digital Elevation Model)的解算中,分析指出了传统Mora方程所存在的问题,并对其进行了修正.对工程实际中所采取的沿距离向分块处理策略进行了阐述,详细分析了该处理策略带来的DEM定位误差.基于TanDEM-X系统典型参数的仿真实验结果验证了本文理论分析的正确性.Target location is one of the key steps in distributed satellites interferometric synthetic aperture radar （InSAR） processing to acquire the digital elevation model （DEM）. The geolocation equations for dis- tributed satellites InSAR working in bistatic and conventional monostatic mode are studied respectively. Based on the classical Mora equations, original DEM calculation is presented. Problems existing in the Mo- ra equation is analysed and modified. A block-processing strategy in range direction is described to reduce the computation in engineering. The location error induced by the process strategy is analyzed theoretically. Finally, a simulation with TanDEM-X typical parameters is performed to prove the validity of the theo- retical analysis.

关 键 词：分布式编队卫星 干涉合成孔径雷达(InSAR) 数字高程模型(DEM) 定位误差 

分 类 号：P228[天文地球—大地测量学与测量工程]