Imaging irregular ground with GPR data

Ground Penetrating Radar data is often focussed into images of the ground to provide interpretation of buried targets that is easier to understand than traditional B-scans. This paper examines the use of a new, `high contrast', imaging technique, applied to the very realistic problem where the ground is not uniform but contains many small voids. The basic frequency dependence of the problem is outlines in terms of Rayleigh scattering. Finite Difference Time Domain simulation is seen to validate the approach and confirm basic method of identifying the signature of voids in the ground.