Calibration of the InSAR Coseismic Deformation of 2011 Tohoku Earthquake by GPS ata
Abstract 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.
Key words ：
Tohoku earthquake
InSAR
GPS
orbital ramps correction；incidence angle
Cite this article:
LU Juan,WU Jicang,CHEN Yanling. Calibration of the InSAR Coseismic Deformation of 2011 Tohoku Earthquake by GPS ata[J]. jgg, 2017, 37(7): 726-731.
LU Juan,WU Jicang,CHEN Yanling. Calibration of the InSAR Coseismic Deformation of 2011 Tohoku Earthquake by GPS ata[J]. jgg, 2017, 37(7): 726-731.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2017/V37/I7/726
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