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How many of you remember Jefferson Proving Ground (JPG), Indiana? That is where it, more or less, all began with unexploded ordnance (UXO) detection and discrimination. In the early 1990's, the U.S. Army Environmental Center (AEC), Aberdeen, Maryland, was tasked by Congress to conduct a program to demonstrate and evaluate systems and technologies to detect, identify and remediate buried UXO. AEC selected JPG as a test site and assigned the Naval Explosives Ordnance Technology Division, Indian Head, Maryland, as technical lead in the program. Between 1994 and 1999, four demonstration phases (Phases I through IV) using various UXO detection technologies were held at two controlled test sites (40- and 80-acres) where inert ordnance and debris were emplaced. Scoring during the first two Phases was based on a comparison of the demonstrators' data to known target data.
Phases I and II demonstrated that a combination of electromagnetic induction (EMI) and magnetometry performed the best. It was also concluded that, during Phases I and II, GPR systems performed poorly, both in terms of poor ordnance detection and high false alarm rates, and airborne systems were totally ineffective.
In Phase III, an existing controlled site was modified to incorporate geographically defined UXO scenarios, including an aerial gunnery range, artillery and mortar range, grenade and submunition range, and an interrogation and burial area. In general, the 15 demonstrators detected and localized a significant portion of the emplaced UXO.
Through the first three phases it was evident that there was an excessive rate of false alarms being recorded. The problem …