Improved Gpr Interpretation From Analysis Of Buried Target Polarization Properties

Ground penetrating radar (GPR) investigations are often focused on the detection<br>of subsurface targets such as barrels, pipes, and isolated patches of<br>contaminants. Unfortunately many study areas also contain undesirable signals<br>from other objects such as logs, concrete, and disrupted soil. Knowledge of the<br>polarization properties of targets with different degrees of symmetry coupled with<br>GPR data containing polarization information enhances the interpretation of GPR<br>data over complex subsurface zones.<br>An ongoing study at The Ohio State University is investigating GPR polarization<br>with an array of antennas pulled by hand or towed behind an all-terrain vehicle.<br>The two-channel GPR system contains a switch that alternates radiation from one<br>antenna to a transmit antenna orthogonal to the first antenna. The receive<br>antennas are in a crossed-dipole configuration located at the center of the array.<br>Parallel, perpendicular, and cross polarization data. are received from subsurface<br>targets from the two orthogonal transmit antennas.