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Accounting for the influence of salt water in the physics required for processing underwater UXO EMI signals
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Paper Abstract

Processing electromagnetic induction signals from subsurface targets, for purposes of discrimination, requires accurate physical models. To date, successful approaches for on-land cases have entailed advanced modeling of responses by the targets themselves, with quite adequate treatment of instruments as well. Responses from the environment were typically slight and/or were treated very simply. When objects are immersed in saline solutions, however, more sophisticated modeling of the diffusive EMI physics in the environment is required. One needs to account for the response of the environment itself as well as the environment’s frequency and time-dependent effects on both primary and secondary fields, from sensors and targets, respectively. Here we explicate the requisite physics and identify its effects quantitatively via analytical, numerical, and experimental investigations. Results provide a path for addressing the quandaries posed by previous underwater measurements and indicate how the environmental physics may be included in more successful processing.

Paper Details

Date Published: 8 May 2018
PDF: 10 pages
Proc. SPIE 10628, Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXIII, 106280L (8 May 2018); doi: 10.1117/12.2305161
Show Author Affiliations
Fridon Shubitidze, Thayer School of Engineering at Dartmouth (United States)
White River Technologies, Inc. (United States)
Benjamin E. Barrowes, U.S. Army Engineer Research and Development Ctr. (United States)
Irma Shamatava , White River Technologies, Inc (United States)
Thayer School of Engineering at Dartmouth (United States)
John Sigman, Thayer School of Engineering at Dartmouth (United States)
Kevin A. O'Neill, Thayer School of Engineering at Dartmouth (United States)


Published in SPIE Proceedings Vol. 10628:
Detection and Sensing of Mines, Explosive Objects, and Obscured Targets XXIII
Steven S. Bishop; Jason C. Isaacs, Editor(s)

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