InSAR地形重建中大气效应的估计和去除

万青; 张路; 蒋厚军; 王腾; 廖明生

doi:10.11834/jrs.20121254

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InSAR地形重建中大气效应的估计和去除
Estimation and removal of atmospheric effects in InSAR topographic mapping
2012年16卷第5期页码：1074-1088
纸质出版：2012
DOI： 10.11834/jrs.20121254
稿件说明：

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[1]万青,张路,蒋厚军,王腾,廖明生.InSAR地形重建中大气效应的估计和去除[J].遥感学报,2012,16(05):1074-1088. DOI： 10.11834/jrs.20121254.

Estimation and removal of atmospheric effects in InSAR topographic mapping[J]. Journal of Remote Sensing, 2012, 16(5): 1074-1088. DOI： 10.11834/jrs.20121254.

摘要

有效估计和消除大气效应的影响是提高InSAR应用能力的关键之一。本文对重复轨道干涉模式下大气相位产生的原因及其时空分布规律进行分析研究

提出了一种利用外部低分辨率DEM数据辅助改正大气相位的方法

通过对比大气改正前后结果DEM的高程精度验证了方法的有效性。

Abstract

In order to further improve the practicability of InSAR technology

it is essential to study how to estimate and eliminate the undesired impact of atmospheric effects. In this study

the causes of atmospheric path delay are elaborated and their temporal/spatial distributions in repeat-pass InSAR are analyzed. A new method is proposed to correct the atmospheric effects in high-resolution tandem-mode InSAR through the use of an existing low-resolution DEM. The resultant elevation models obtained with and without the atmospheric correction are compared with the 30m-resolution ASTER GDEM to verify the effectiveness of the proposed method in terms of topographic mapping accuracy.