Home Articles Various INSAR Methods to produce deformation maps

Various INSAR Methods to produce deformation maps

Abstract

Hersh Fattahi
student
K.N.Toosi University of Technology,
Email: [email protected]

M.J.Valadan zoje
assistant professor
K.N.Toosi University of Technology
Email: [email protected]

Mohammad Reza Mobasheri
assistant professor
K.N.Toosi University of Technology
Email: [email protected]

Maryam Dehghani
PHD student of Remote Sensing
K.N.Toosi University of Technology & Geological Survey of Iran
Email: [email protected]

InSAR a synonym for Interferometry Synthetic Aperture Radar is a Radar technique that combines SAR images and uses their phase information to obtain Digital Elevation Model or deformation map of a region.
There are various InSAR methods to produce deformation maps. The conventional InSAR method to measure movements is the Differential InSAR method. Some InSAR limitations like Baseline and Temporal decorrelation and atmospheric effects lead to use new InSAR techniques such as Polarimetry InSAR, Permanent Scatterer InSAR and combination of GPS and InSAR .
In this article the principles of several methods including various techniques of Differential, Polarimetry and Permanent Scatterer InSAR as well as the combination of GPS and Interferometry have been explained. Furthermore, the deformation map due to the earthquake happened in south of Iran has been produced using the appropriate method. It has been tried to remove the remaining errors in the resulted deformation map such as the orbital effects. The second purpose of this research was to study different factors including thermal noise, lack of parallelism between the radar flight tracks, spatial baseline noise, and surficial change contributing to the radar echo correlation.