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Proceedings Paper

Low-noise magnetic sensing for marine munitions characterization
Author(s): Gregory Schultz; Joe Keranen; Stephen Billings; Raul Fonda; Jack Foley; Chet Bassani
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Paper 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.

Paper Details

Date Published: 23 May 2011
PDF: 9 pages
Proc. SPIE 8017, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI, 80170T (23 May 2011); doi: 10.1117/12.884010
Show Author Affiliations
Gregory Schultz, Sky Research, Inc. (United States)
Joe Keranen, Sky Research, Inc. (United States)
Stephen Billings, Sky Research, Inc. (United States)
Raul Fonda, Sky Research, Inc. (United States)
Jack Foley, Sky Research, Inc. (United States)
Chet Bassani, Sky Research, Inc. (United States)

Published in SPIE Proceedings Vol. 8017:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XVI
Russell S. Harmon; John H. Holloway Jr.; J. Thomas Broach, Editor(s)

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