Subsurface object imaging with two types of RTR-differential GPR system

The main aim of this work is to analyze imaging possibilities of differential antenna systems that consist of transmitting antenna and a pair of receiving antennas symmetrically displaced with respect to the transmitting one a) along the direction of GPR movement; b) in the direction normal to the ground surface. To do this, radargrams are simulated by a specialized finite-difference time-domain solver. A modificated SAR approach is applied to process the synthetic differential data and to achieve object image.