Synthetic aperture sonar for seabed imaging : relative merits of narrow-band and wide-band approaches

This paper describes the advantages of using wide-band sonar systems in underwater acoustical imaging by means of synthetic aperture (side-looking) sonars. These advantages will be illustrated through simulation examples. The simulations are conducted in two cases of sonar platform motion: perfect t...

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Bibliographic Details
Published in:IEEE journal of oceanic engineering 1992, Vol.17 (1), p.95-105
Main Authors: CHATILLON, J, BOUHIER, M.-E, ZAKHARIA, M. E
Format: Article
Language:English
Subjects:
acoustic imagery
Acoustics
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
image processing
Marine
Physics
side scan sonar
signal processing
sonar imagery
synthetic aperture sonar
Underwater sound
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Summary:This paper describes the advantages of using wide-band sonar systems in underwater acoustical imaging by means of synthetic aperture (side-looking) sonars. These advantages will be illustrated through simulation examples. The simulations are conducted in two cases of sonar platform motion: perfect trajectory and disturbed trajectory. We investigate several schemes used for wide-band synthetic aperture processing and evaluate their relative merits (resolution and complexity) in the case of both disturbed and perfect trajectories. Quantitative image evaluation is initially achieved through the evaluation of performance as regards resolution. The problems involved in the definition of the image quality are then discussed.
ISSN:0364-9059
1558-1691
DOI:10.1109/48.126958