| 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 |
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| 引用本文： | 张亚利,游扬声,兰敬松. 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[J]. 遥感技术与应用, 2010, 25(3): 399-403. DOI: 10.11873/j.issn.1004-0323.2010.3.399 |
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| 作者姓名： | 张亚利 游扬声 兰敬松 |
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| 作者单位： | 重庆大学土木工程学院,重庆 400045 |
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| 基金项目： | 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）。 |
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| 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。
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| 关 键 词： | InSAR 大气延迟 误差分析 |
Error Analysis of Baseline, Phase and Atmosphere Delay in InSAR Data Processing |
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| ZHANG Ya-li,YOU Yang-sheng,LAN Jing-song. Error Analysis of Baseline, Phase and Atmosphere Delay in InSAR Data Processing[J]. Remote Sensing Technology and Application, 2010, 25(3): 399-403. DOI: 10.11873/j.issn.1004-0323.2010.3.399 |
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| Authors: | ZHANG Ya-li YOU Yang-sheng LAN Jing-song |
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| Affiliation: | College of Civil Engineering,Chongqing University,Chongqing 400045,China |
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| 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. |
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| Keywords: | Atmosphere delayzz Error analysiszz |
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