Synthetic aperture sonar for sub bottom imaging

Master Thesis

1986

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http://hdl.handle.net/11427/21962
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thesis_ebe_1986_dutkiewicz_marek_karol.pdf (2.64 MB)
Authors
Dutkiewicz, Marek Karol
Supervisors
Denbigh, P N
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University of Cape Town

Department
Department of Electrical Engineering
Faculty
Faculty of Engineering and the Built Environment
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Abstract
The major problems associated with implementing synthetic apertures in sonar may be overcome by applying the technique to sub-bottom imaging. The use of a low frequency aids both penetration of the sediment and the attainment of long coherent apertures. The implementation of synthetic apertures realises a narrow fan beam. By directing this beam out sideways, a more rapid survey rate is possible than that achieved by the normal echo-sounding mode used in sub-bottom profiling. The synthetic aperture technique appears to offer significant advantages over that of parametric arrays, for high resolution sub-bottom imaging. Synthetic apertures have been implemented in a laboratory tank, under controlled conditions at a fresh water reservoir, and under realistic operational conditions at sea. Encouraging results have been obtained.
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Keywords
Synthetic apertures

Reference:

Dutkiewicz, M. 1986. Synthetic aperture sonar for sub bottom imaging. University of Cape Town.

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