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1

Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China

2

School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083, Hunan, China





*

Author to whom correspondence should be addressed.



Abstract Interferometric Synthetic Aperture Radar InSAR is a powerful technology for observing the Earth surface, especially for mapping the Earths topography and deformations. InSAR measurements are however often significantly affected by the atmosphere as the radar signals propagate through the atmosphere whose state varies both in space and in time. Great efforts have been made in recent years to better understand the properties of the atmospheric effects and to develop methods for mitigating the effects. This paper provides a systematic review of the work carried out in this area. The basic principles of atmospheric effects on repeat-pass InSAR are first introduced. The studies on the properties of the atmospheric effects, including the magnitudes of the effects determined in the various parts of the world, the spectra of the atmospheric effects, the isotropic properties and the statistical distributions of the effects, are then discussed. The various methods developed for mitigating the atmospheric effects are then reviewed, including the methods that are based on PSInSAR processing, the methods that are based on interferogram modeling, and those that are based on external data such as GPS observations, ground meteorological data, and satellite data including those from the MODIS and MERIS. Two examples that use MODIS and MERIS data respectively to calibrate atmospheric effects on InSAR are also given. View Full-Text

Keywords: Interferometric Synthetic Aperture Radar InSAR; atmospheric effects; atmospheric correction; MODIS; MERIS Interferometric Synthetic Aperture Radar InSAR; atmospheric effects; atmospheric correction; MODIS; MERIS





Author: Xiao-li Ding 1,* , Zhi-wei Li 2, Jian-jun Zhu 2, Guang-cai Feng 1 and Jiang-ping Long 1

Source: http://mdpi.com/



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