Abstract
Currently, the deformation of the Earth's surface in both space and time due to dynamic processes can be detected accurately through satellite observations. For this study, the rates of three-dimensional displacement were estimated by integrating data from the Global Positioning System (GPS) and Persistent Scatterer Interferometric Synthetic Aperture Radar (PSInSAR) in the Afar region. Velocities in the line-of-sight (LOS) of PSInSAR data from multiple tracks, both ascending and descending and GPS data from 2006 to 2009 were combined by using the least-squares method with variance-component estimation. After conducting statistical analysis and comparing the PSInSAR and GPS data, the combined three-dimensional result revealed crustal deformation with velocities ranging from −19.94 mm/year to 10.58 mm/year to the East-West direction, and −10.39 mm/year in up-down direction, respectively.
Published Version
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