Synthetic aperture sonar for sub bottom imaging

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.

Grantor dc:publisher.institution

Department of Electrical Engineering

Year dc:date.issued

1986

Author dc:creator

• Dutkiewicz, Marek Karol

Advisor dc:contributor.advisor

• Denbigh, P N

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/21962

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/21962