A Novel Technique for Modelling Ship Magnetic Signatures

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Authors
  1. Lucas, C.E.
  2. Richards, T.C.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN)
Abstract
This paper presents a new technique for modelling the magnetic signature of a naval platform. Recorded magnetic measurements of a ship’s signature are transformed into a three-axis rectangular coordinate system relative to the vessel, which facilitates the modelling of the ship’s magnetic signature using a distribution of longitudinal prolate spheroids with magnetizations in three dimensions. A unique magnetic inversion technique known as one-spike-at-a-time is used to generate an optimally sparse set of model magnetizations that fit the measured data and permit the rapid visualization of the vessel’s magnetic signature anywhere in space, and is particularly useful for reporting signature levels at standardized depths and offsets. The model based signature approach simplifies signature manipulation such as the separation of the permanent and induced magnetic signature, and is demonstrated using magnetic north and south runs recorded for CFAV Quest.
Keywords
magnetic field;signature, modeling;magnetometer;accelerometer
Report Number
DRDC-RDDC-2015-N012 — External Literature
Date of publication
18 Jun 2015
Number of Pages
14
DSTKIM No
CA040751
CANDIS No
801816
Format(s):
Electronic Document(PDF)

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