InSAR数据处理中的误差分析

基金项目: 湖北省青年杰出人才基金资助项目(2002AC011);高等学校博士点专项基金资助项目(20030486038);武汉大学知识创新工程基金资助项目

详细信息

Error Analysis in InSAR Data Processing

1 Research Center of GPS, Wuhan University, 129 Luoyu Road, Wuhan 430079, China;
2 Presidential Secretariate, Wuhan University, Luojia Hill, Wuhan 430072, China;
3 School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

摘要: 针对星载雷达,从InSAR的基本原理出发,综合推导并讨论了相位观测误差、卫星轨道误差、地形误差等各类误差源对不同工作模式(包括重复飞行InSAR生成DEM,Two passDInSAR监测地表形变,以及Three passDInSAR监测地表形变)的影响。
- InSAR /
- DInSAR /
- 卫星轨道 /
- 地形 /
- 误差分析
Abstract: This paper investigates the impacts of the uncertainties of phase measurement, orbits and topography on the products of repeat-pass InSAR, Two-pass DInSAR and Three-pass DInSAR, respectively.The sensitivity of deformation with respect to phase measurement errors is about 3 000 times lower than that of topography to phase measurement errors.The longer the effective baseline is, the less the impact of the uncertainty of baseline on heights is.For a small area (e.g.5 km), a moderate DEM accuracy (e.g.16m) can be reached be using the baseline with an accuracy of 1m, only if the effective baseline is moderate (e.g.200 m).But for a large area, a baseline accuracy of 5 cm should be expected in topography mapping.
- InSAR /
- DInSAR /
- satellite orbit /
- topography /
- error analysis