Study on ground based synthetic aperture radar signal processing and interferometry for change detection

Abstract

In this study, a ground based synthetic aperture radar system is designed to collect the experimental data for monitoring the target region, form indoor and outdoor two dimensional radar images, compare two radar images received at different times and detect potential changes and movements of the objects by using radar interferometry. Ground-based synthetic aperture radar interferometry is a powerful tool to re ceive the velocity field of the target region, compare two radar images and calculate the displacements of the objects in the target region. In the interferometric phase image, the large phase differences or the discontinuities between consecutive pixels are eliminated to reconstruct the true profile and reduce the effect of the local errors by us ing two dimensional phase unwrapping algorithm. Also, atmospheric and instrumental decorrelation sources are excluded to correct phase and displacement measurements in the radar interferometry. Finally, the true phase changes and the actual displacements are received. An application of ground-based synthetic aperture radar interferometry is ana lyzed and discussed in this study. Results show that the proposed method on ground based synthetic aperture radar is a valid alternative to spaceborne and airborne synthetic aperture radar interferometr.