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Arc arrays: studies of high resolution techniques for multibeam bathymetric applications

DRS at CSIR-National Institute of Oceanography

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Title Arc arrays: studies of high resolution techniques for multibeam bathymetric applications
 
Creator Chakraborty, B.
Schenke, H.W.
 
Subject arrays
multibeam sonar
bathymetry
transducers
echosounding
acoustics
 
Description In this paper a theoretical study is initiated to observe the utility of directional spectral estimation techniques for `arc array' geometries. We examine the suitability of a 15 degrees arc transducer geometry for multibeam bathymetric applications. This geometry is tested using the Bartlett method for varying arc and linear arrays of 30 - elements. We also examine `high resolution techniques' such as the Maximum LIkelihood (ML) method and the Maximum Entropy (ME) methods (different orders), for 16-element arrayof 15 degrees arc. The superiorityof the high resolution methods is seen by examining the patterns of the 15 degrees arc array under multiple source/interference conditions, i.e. the situation for rough terrain or artefactcreating conditions. Furthermore, the 15 degrees arc array geometry is found to be useful for multifrequency applications at different operating wavelengths, which is useful for underwater bathymetric applications
 
Date 2009-01-25T06:05:34Z
2009-01-25T06:05:34Z
1995
 
Type Journal Article
 
Identifier Ultrasonics, Vol.33; 457-461p.
http://drs.nio.org/drs/handle/2264/2362
 
Language en
 
Rights Copyright [1995]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Elsevier