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The Use of Synthetic Aperture Radar Interferometry to Study Geohazards and Survey Topography

DENG Hui and HUANG Run-qiu ( National Laboratory of Geohazards Prevention and Geo - Environment Protection , Chengdu University of Technology, Chengdu ,610059 China)  
Synthetic Aperture Radar Interferometry (InSAR) provides a new tool to study geohazards and survey topography. A map of the surface displacement with subcentimeter accuracy can be constructed using, if the Earth's surface deformed between two radar image acquisitions, for example land subsidence, landslide, volcano and so on. This article gives a basic overview of InSAR for engineering geology scientists and presents a selection of geologic applications that demonstrate the unique capabilities of InSAR for studying geohazards and surveying topography.
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