GEOCODING OF SAR DATA AND IT'S ACCURACY ASSESSMENT

Abstract

Digital Elevation Models (DEMs) and the products derived from them are widely used for numerous applications by the geo-scientific and civil engineering applications community. Synthetic Aperture Radar (SAR) Interferometry is a new technique, which provides these digital elevation models. SAR Interferometry is receiving increased attention as an efficient technique for derivation of topographic information. Over the last few years SAR Interferometry has become a promising technique for various applications like topographic mapping, monitoring seismic events, etc. The present study deals with the GEOCODING of SAR derived DEMs and Intensity images using SAR Interferometric technique and to compare the heights obtained h" c AR heights with the heights obtained by the gamma syftwin e. SAR lnterferometry geocoding of the SAR images is an important task, using which, the unwrapped phase information can be converted into topographic information. In this technique the unwrapped phase of the image file is used to find out the corresponding latitude, longitude and height, and also apply the correction for minimizing the geometric dislocation.