Exploitation of a ship's magnetic field signatures
By: Holmes, John J.
Material type:
BookSeries: Synthesis lectures on computational electromagnetics: #9.Publisher: San Rafael, Calif. (1537 Fourth Street, San Rafael, CA 94901 USA) : Morgan & Claypool Publishers, c2006Edition: 1st ed.Description: 1 electronic text (ix, 67 p. : ill. (some col.)) : digital file.ISBN: 1598290754 (electronic bk.); 9781598290752 (electronic bk.); 1598290746 (pbk.); 9781598290745 (pbk.).Uniform titles: Synthesis digital library of engineering and computer science. Subject(s): Magnetic fields | Magnetism of ships | Submarine mines | Submarines (Ships) | Underwater surveillance | Magnetic anomaly detection | Magnetic signatures | Naval mines | Submarine surveillanceDDC classification: 623/.042 Online resources: Abstract with links to resource | Abstract with links to full text Also available in print.| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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E books
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PK Kelkar Library, IIT Kanpur | Available | EBKE025 |
Mode of access: World Wide Web.
System requirements: Adobe Acrobat Reader.
Part of: Synthesis digital library of engineering and computer science.
Series from website.
Includes bibliographical references.
1. Introduction -- 2. Shipboard sources of magnetic field -- 2.1. Evolution of the magnetic ship -- 2.2. Ferromagnetic signatures -- 2.3. Other important sources of magnetic field -- 3. Exploitation of magnetic signatures by naval mines -- 3.1. Evolution of the magnetic mine -- 3.2. Modern magnetic mine technologies -- 3.3. Magnetic mine countermeasures -- 4. Exploitation of magnetic signatures by submarine surveillance systems -- 4.1. Evolution of the submarine magnetic detection system -- 4.2. Magnetic harbor loops -- 4.3. Submarine barriers using triaxial magnetic field vector sensors -- 4.4. Submarine barriers using total field magnetometers -- 5. Summary.
Abstract freely available; full-text restricted to subscribers or individual document purchasers.
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Surface ship and submarine magnetic field signatures have been exploited for over 80 years by naval influence mines, and both underwater and airborne surveillance systems. The generating mechanism of the four major shipboard sources of magnetic fields is explained, along with a detailed description of the induced and permanent ferromagnetic signature characteristics. A brief historical summary of magnetic naval mine development during World War II is followed by a discussion of important improvements found in modern weapons, including an explanation of the damage mechanism for non-contact explosions. A strategy for selecting an optimum mine actuation threshold is given. A multi-layered defensive strategy against naval mines is outlined, with graphical explanations of the relationships between ship signature reduction and minefield clearing effectiveness. In addition to a brief historical discussion of underwater and airborne submarine surveillance systems and magnetic field sensing principles, mathematical formulations are presented for computing the expected target signal strengths and noise levels for several barrier types. Besides the sensor self-noise, equations for estimating geomagnetic, ocean surface wave, platform, and vector sensor motion noises will be given along with simple algorithms for their reduction.
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