InSAR数据处理中的误差分析

Error Analysis in InSAR Data Processing

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 )

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.