Low-noise magnetic sensing for marine munitions characterization

Gregory Schultz; Joe Keranen; Stephen Billings; Raul Fonda; Jack Foley; Chet Bassani

doi:10.1117/12.884010

23 May 2011 Low-noise magnetic sensing for marine munitions characterization

Gregory Schultz, Joe Keranen, Stephen Billings, Raul Fonda, Jack Foley, Chet Bassani

Proceedings Volume 8017, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI; 80170T (2011) https://doi.org/10.1117/12.884010
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Because the recovery of underwater munitions is many times more expensive than recovering the same items on dry land, there is a continuing need to advance marine geophysical characterization methods. To efficiently and reliably conduct surveying in marine environments, low-noise geophysical sensors are being configured to operate close to the sea bottom. We describe systems that are deployed from surface vessels via rigid or flexible tow cables or mounted directly to submersible platforms such as unmanned underwater vehicles. Development and testing of a towed configuration has led to a 4 meter wide hydrodynamically stable tow wing with an instrumented top-side assembly mounted on the stern of a surface survey vessel. An integrated positioning system combined with an instrumented cable management system, vessel and wing attitude and wing depth measurements to provide sub-meter positional accuracy in up to 25 meter water depths and within 1 to 2 meters of the seafloor. We present the results of data collected during an instrument validation survey over a series of targets emplaced at measured locations. Performance of the system was validated through analyses of data collected at varying speeds, headings, and height above the seafloor. Implementation of the system during live-site operations has demonstrated its capability to survey hundreds of acres of marine or lacustrine environment. Unique deployment concepts that utilize new miniaturized and very low noise sensors show promise for expanding the applicability of magnetic sensing at marine sites.

Citation Download Citation

Gregory Schultz, Joe Keranen, Stephen Billings, Raul Fonda, Jack Foley, and Chet Bassani "Low-noise magnetic sensing for marine munitions characterization", Proc. SPIE 8017, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI, 80170T (23 May 2011); https://doi.org/10.1117/12.884010

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