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CHARACTERIZATION OF A COOPERATIVE TARGET FOR GROUND-PENETRATING RADAR

A cooperative target (CT) has been developed to enhance the ground-penetrating radar (GPR) signal-toclutter ratio for buried man-made targets. Applications include tagging high-value buried structures and monitoring microtunnelling equipment. Results are presented for a time-domain CT, comprised of a dipole antenna connected to an unterminated delay line. Multiple GPR measurements made from separate positions, together with a priori knowledge of the dielectric properties of the intervening ground, allow good estimation of the position of the tagged target through triangulation. By using several independent time-domain cooperative targets, strategically arrayed about a target, the rotational aspect of the target can also be obtained. Finally, harmonic generation is demonstrated as a technique for a frequency-domain CT.