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《Journal of Geodesy and Geodynamics》 2017-07
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Calibration of the InSAR Coseismic Deformation of 2011 Tohoku Earthquake by GPS ata

LU Juan;WU Jicang;CHEN Yanling;College of Surveying and Geo-Informatics,Tongji University;Shanghai Astronomical Observatory,CAS;  
Orbital state vectors are important parameters that play crucial roles in the processing of InSAR,from the original offset of coarse registration to the accurate generation of the ultimate DEM or deformation measurements.Errors in the baseline are caused by errors in the orbital state vectors,which present as phase errors in the interferogram.We map the coseimic deformation of the 2011 Tohoku earthquake with data from four ascending ALOS/PALSAR tracks and GPS coseimic displacements that cover most of northeastern Japan.The quadratic polynomial approximation is proposed to eliminate orbital errors from the interferogram,and we analyze the effects of incidence angle.The precision of corrected coseimic deformation measured by InSAR is verified by analyzing the residual deformation in the interferogram.
【Fund】: 国家973计划(2013CB733304);; 国家自然科学基金(41174024)~~
【CateGory Index】: P315.7
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