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。
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.
出处
《遥感学报》
EI
CSCD
北大核心
2012年第5期1074-1088,共15页
NATIONAL REMOTE SENSING BULLETIN
基金
中欧合作"龙计划"二期项目(编号:5297)
国家自然科学基金(编号:41021061)
国家高技术研究发展计划(863计划)(编号:2011AA120404)
高等学校博士学科点专项科研基金(编号:20110141110057)~~
关键词
雷达干涉测量
大气效应
相位改正
地形重建
InSAR, atmospheric effects, phase correction, topographic mapping
