A rolling line source for a seismic sonar
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Authors
McClelland, Scott C.
Subjects
seismic sonar
Advisors
Baker, Steven R.
Muir, Thomas G.
Date of Issue
2002-06
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
This thesis builds on ideas of a seismo-acoustic sonar as a mine detection tool and is part of an ongoing Naval Postgraduate School (NPS) research project. Building on this foundation of research, a source was developed to enable mobility. The previous NPS array [Sheetz] design employed an array of sources, buried in the sediment in a line. This arrangement is somewhat cumbersome for direct application. A practical device should be mobile and create a high source signal similar to the previous NPS array. A rolling cylinder provided the solution. The cylinder houses two shakers, identical to the previous NPS array elements, mounted directly to the cylinder wall. The source for a single buried array element, from the previous NPS array, and a single rolling cylinder, placed on the surface, were shown to provide similar seismic velocity at ten meters range. Using this rolling source, we measured wave speed at 83 m/s by signal correlation methods. Employing two rolling cylinder sources against a buried 1000 lb bomb at five meters range resulted in echo detection with only internal signal analyzer algorithms. The ability to send and receive signals on the go was proven to be attainable with a rolling line source.
Type
Thesis
Description
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 68 p. : ill. (some col.) ;
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.