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Geoacoustic inversion in shallow tropical waters for a silty and sandy seabed
Sanjana M C1, Latha G1, G R Potty2
1National Institute of Ocean Technology, Pallikaranai, Chennai-600100, India.
Abstract:
Seabed parameters are inverted from ambient noise measurements at two shallow tropical environments with dissimilar seabed characteristics, a silty and a sandy seabed, using an approach that matches the measured and modeled complex vertical coherence. Coherence is modeled using the Green's function output from the model oases, along with theoretical formulation, for a range independent environment. Genetic algorithm is used to search the model parameter space consisting of sound speed, density, and attenuation in the sediment layers and half-space. Reasonable estimates have been obtained for the silty site, whereas the sandy site gave relatively poor parameter estimates due to reflective seabed and shipping interference.
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