Three-Dimensional (3D) Underground Detection and Imaging Systems use Ground penetrating radar sensor operating in a Synthetic Aperture Radar (SAR) mode. The Ground penetrating radar sensor consists of a state of the art, innovative custom GPR combined with a carrier-phase differential Global Positioning System integrated with a 3-axis inertial sensor suite (dGPS+I). These two subsystems comprise the mobile portion of the Ground penetrating radar SAR data collection system. The ground-based systems include a fixed GPS station to provide data for dGPS corrections and a GPR control system to control Ground penetrating radar emissions and to operate the data collection system. After data is collected over the region to be surveyed, it is then processed on a separate data processing computer. The GPR data is merged with the extracted dGPS+I position and orientation data. A 3D SAR image can then be formed using the merged data.
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