Title
Inversion for bottom parameters using low frequency reverberation data
Author
TNO Fysisch en Elektronisch Laboratorium
Muller, S.H.E.
Ainslie, M.A.
Boek, W.
Simons, D.G.
Publication year
2002
Abstract
Active sonar reverberation returns offer the possibility to invert for geo-acoustic bottom parameters to characterise the underwater environment. We present the results of synthetic inversions of reverberation returs generated with a ray-based reverberation model in which bottom scattering is modelled according to a modified Lambert's rule. The inverted parameters are sediment sound speed, attenuation and the scattering strength, parametrised by Lambert's constant and a low grazing angle threshold. The sediment density is calculated during the inversions through an empirical relationship to sediment sound speed. Results of inversions of synthetic data using a genetic algorithm are presented both for a soft muddy bottom and a harder and rougher bottom consisting of coarse sand. We also investigate the effect of an error in water depth.
Subject
Seabed classificartion
Reverberation
Inversion techniques
Shallow water
Sound propagation
Low frequency active sonar
Genetic algorithms
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http://resolver.tudelft.nl/uuid:793d4063-148d-4393-bca9-543ba5b2c342
TNO identifier
95511
Publisher
Gdansk Univ. of Technology, Gdansk
ISBN
8390759187
Source
Proceedings of the 6th European conference on underwater acoustics, ECUA 2002, 24-27 June 2002, Gdansk, Poland, 147-152
Document type
conference paper