基线误差、相位误差和大气延迟误差对InSAR数据处理的影响分析  

Error Analysis of Baseline,Phase and Atmosphere Delay in InSAR Data Processing

作　　者：张亚利[1] 游扬声[1] 兰敬松[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《遥感技术与应用》2010年第3期399-403,共5页Remote Sensing Technology and Application

基　　金：国家自然科学基金项目(NSFC-40674015);重庆市自然科学基金项目(CSTC-2007BB2193;CSTC-2006BB0168)

摘　　要：基于星载InSAR的基本原理,首先推导了基线误差、相位误差和大气延迟误差对高程测量的影响公式,得出了他们均与有效基线长度成反比的影响规律。接着讨论了大气延迟误差对二轨法和三轨法形变测量的影响规律:大气延迟误差对二轨法形变测量的影响随入射角变化不明显,对三轨法形变测量的影响随基线比变化不明显。当入射角取23°,基线比取1/2,欲使大气延迟误差对形变测量的影响<1 cm,二轨法要求其测量误差<6.5 mm,三轨法要求其测量误差<7.5 mm。Based on the basic principles of InSAR,we can draw the following conclusions：an inverse proportion relation exists between errors of baseline,phase and atmosphere delay and length of effective baseline in terms of height measurement;atmosphere delay error impact on two-pass deformation measurement changes little with incidence angle difference,and its impact on three-pass deformation measurement changes little with baseline ratio.When incidence angle is 23°and baseline ration 1/2,if we let its impact on deformation error less than 1 cm,atmosphere delay error must be less than 6.5 mm for two-pass DInSAR and 7.5 mm for three-pass DInSAR.

关 键 词：INSAR 大气延迟 误差分析 

分 类 号：TN95[电子电信—信号与信息处理]