Detection of ship wake using an airborne magnetic transducer

Author

Zou, Nan ; Nehorai, Arye

Author_Institution

DSO Nat. Labs., Singapore

Volume

2

fYear

1998

fDate

1-4 Nov. 1998

Firstpage

1316

Abstract

Wakes induced by motion of vessels may extend for tens of kilometers and exist for hours under certain conditions in open sea. This forms a useful feature for long-range ship detection. We present a method for passively detecting a ship wake using measurements obtained by an airborne SQUID magnetic transducer that measures the first-order gradients of the magnetic signature induced by the wake. Analytical formulas of wake magnetic gradients are derived to provide guidelines for designing the airborne detector. We also derive probability bounds of wake detection for cross-correlation and square-law detectors, which can be used to predict the expected performance.

Keywords

electromagnetic induction; magnetic field measurement; military systems; ocean waves; ships; target tracking; transducers; wakes; airborne SQUID magnetic transducer; airborne detector; airborne magnetic transducer; cross-correlation detector; first-order gradients; long-range ship detection; magnetic signature; ship wake; square-law detector; wake magnetic gradients; Dielectrics; Equations; Geomagnetism; Geometry; Magnetic field measurement; Magnetic fields; Marine vehicles; Oceans; Sea surface; Transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-5148-7

Type

conf

DOI

10.1109/ACSSC.1998.751539

Filename

751539