Battelle and The Ohio State University ElectroScience Laboratory have built and demonstrated a ground-penetrating radar (GPR) system for locating buried unexploded ordnance (UXO). The system is ground based and towed by an autonomously controlled vehicle as part of the Subsurface Ordnance Characterization System (SOCS), This paper presents the results of the synthetic aperture radar (SAR) processing of the radar data acquired at Tyndall Air Force Base, FL, and Jefferson Proving Ground (JPG), IN. A companion paper by Chen and Peters presents the results of the complex natural-resonance processing used to identify the size of the ordnance items.