Document Type : Original Research Paper
Authors
1 M. Sc., K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.
2 Associate Professor, K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.
3 Ph.D., K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.
Abstract
In this paper, the Bam post-seismic annual deformations in period from 2004 to 2010 have been obtained using synthetic aperture radar interferometry. The time series of deformations have been constructed using Persistent Scatterer Radar Interferometry technique. When displacements rate in the area are low and the pixels are with temporal decorrelation, this technique is more effective. The technique also largely reduces the topography residuals and atmospheric delay. Because of the low rates of post-seismic displacements, this technique is very useful for measuring such earth surface displacements. The results illustrate that the maximum amount of uplift and subsidence displacements for Line Of Sight (LOS) direction during 2004 to 2010 after the earthquake are 4.5± 0.5 and -4.3± 0.5 centimeter, respectively. Comparison of displacement fields demonstrates that the displacements reduction rates are approaching to the co-seismic phase. In addition, the results of post-seismic modeling proves that displacements field, follows exponential or logarithmic function.
Keywords
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