InSAR atmospheric distortions mitigation: GPS observations and NCEP FNL data

InSAR atmospheric distortions mitigation: GPS observations and NCEP FNL data
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InSAR 大气畸变缓解:GPS 观测和 NCEP FNL 数据

DOI:
10.1016/j.jastp.2010.11.003
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发表时间:
2011-03
影响因子:
1.9
通讯作者:
He, Xiufeng
He, Xiufeng
中科院分区:
地球科学4区
文献类型:
--
作者:
Chang, Liang;He, Xiufeng

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大气延迟变化会对干涉图的解释造成问题。本文提出了一种通过整合GPS观测数据和美国国家环境预测中心(NCEP FNL)全球业务分析数据来减轻干涉合成孔径雷达(InSAR)干涉图大气畸变的方法。从NCEP FNL中提取平均风来实现Taylor的冻结流假设,这增加了GPS导出的湿延迟控制点的密度。结果表明,GPS观测数据与NCEP FNL数据相结合可以有效识别和缓解ENVISAT先进合成孔径雷达(ASAR)干涉图大气畸变。此外,还表明可以实现Taylor的冻结流假设,并获得更密集的控制点湿延迟网络来减轻InSAR大气延迟。
Atmospheric delay variations can cause problems for the interpretation of interferograms. In this paper, we propose a method to mitigate the atmospheric distortions of the interferometric synthetic aperture radar (InSAR) interferogram by integrating GPS observations and operational global analysis data from the National Centers for Environmental Prediction Final (NCEP FNL). Mean wind is extracted from NCEP FNL to implement the Taylor's frozen-flow hypothesis, which increases the density of GPS derived wet delay control points. The results indicate that the integration of GPS observations and NCEP FNL data can effectively identify and mitigate ENVISAT Advanced Synthetic Aperture Radar (ASAR) interferogram atmospheric distortions. Furthermore, it is also shown that it is possible to implement Taylor’s frozen-flow hypothesis and obtain a denser network of wet delay of control points to mitigate the InSAR atmospheric delay.
DOI: --
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