InSAR中的误差分析和可靠性理论  

Error Analysis and Reliability Theory in InSAR

作　　者：宋小刚[1] 王尚[2] 席广永[3] 

机构地区：[1]武汉大学遥感信息工程学院,武汉430079 [2]建设综合勘察研究设计院,北京100007 [3]黄河勘测设计有限公司,郑州450003

出　　处：《工程勘察》2007年第2期57-60,共4页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金资助项目(60472039)

摘　　要：基于雷达干涉测量的原理,对InSAR中的一般误差和大气误差进行了分析,分别就定位误差和形变测量的影响建立了误差模型,定量地分析了各种误差对InSAR结果的影响程度,从而为技术应用范围,误差消除方法的选择,以及利用外部数据源的精度要求提供依据。同时讨论了粗差存在情况下InSAR配准和基线精化中的可靠性问题,通过可靠性分析,最优化控制点配置和数目,使系统具有较强的几何强度和抗差能力。Based on the principle of InSAR, numerous error sources in InSAR are analyzed carefully. The error models are established for error positioning and deformation measuring respectively. The impacts of all errors on InSAR result are analyzed quantitatively, which provide a basic idea to evaluate the application scope of the technique, the selection of error correction method and the precision request for external data sources etc. The reliability problem in co-registration and baseline estimation is also discussed in the presence of outliers. Deployment and number of GCPs are optimized through the reliability analysis, which can make the system more capable of resisting outliers with strong geometric strength.

关 键 词：雷达干涉测量 误差分析 大气影响 可靠性 

分 类 号：P225.1[天文地球—大地测量学与测量工程]