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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
【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。
【Abstract】 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.
- 【文献出处】 遥感技术与应用 ,Remote Sensing Technology and Application , 编辑部邮箱 ,2010年03期
- 【分类号】TN957.51
- 【被引频次】12
- 【下载频次】500