李振洪, 刘经南, 许才军. InSAR数据处理中的误差分析[J]. 武汉大学学报 ( 信息科学版), 2004, 29(1): 72-76.
引用本文: 李振洪, 刘经南, 许才军. InSAR数据处理中的误差分析[J]. 武汉大学学报 ( 信息科学版), 2004, 29(1): 72-76.
LI Zhenhong, LIU Jingnan, XU Caijun. Error Analysis in InSAR Data Processing[J]. Geomatics and Information Science of Wuhan University, 2004, 29(1): 72-76.
Citation: LI Zhenhong, LIU Jingnan, XU Caijun. Error Analysis in InSAR Data Processing[J]. Geomatics and Information Science of Wuhan University, 2004, 29(1): 72-76.

InSAR数据处理中的误差分析

Error Analysis in InSAR Data Processing

  • 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。

     

    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.

     

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