Handheld Frequency Domain Vector EMI Sensing for UXO Discrimination

Abstract : SERDP project MM-1537 entitled Handheld Frequency Domain Vector EMI Sensing for UXO Discrimination is complete. The GEM-3D+ incorporated two new aspects of EMI instrumentation with encouraging results: frequency domain vector receivers, and a beacon positioning system. This report contains the final design, engineering challenges, modeling advancements, and data analysis results from this project. This vector receiver coupled with the beacon positioning system resulted in a versatile prototype instrument delivering high quality, diverse data well suited to rigorous models of UXO and soil. New algorithms aimed at utilizing the high quality data from the GEM-3D+ was developed including the Generalized Standardized Excitations Approach (GSEA) and Normalized Surface Magnetic Source (NSMS). Results from this project suggest a further need for high quality, production instruments in the frequency domain suited to UXO remediation efforts.

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