Passive fathometer reflector identification with phase shift modeling

TitlePassive fathometer reflector identification with phase shift modeling
Publication TypeJournal Article
Year of Publication2016
AuthorsMichalopoulou Z.H, Gerstoft P
JournalJournal of the Acoustical Society of America
Volume140
PaginationEL125-EL130
Date Published2016/07
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000382406500022
Keywordsambient noise; impulse-response
Abstract

In passive fathometer processing, the presence of wavelets in the estimate of the medium's Green's function corresponds to the location of reflectors in the seabed; amplitudes are related to seabed properties. Bayesian methods have been successful in identifying reflectors that define layer interfaces. Further work, however, revealed that phase shifts are occasionally present in the wavelets and hinder accurate layer identification for some reflectors. With a Gibbs sampler that computes probability densities of reflector depths, strengths of the reflections, and wavelet phase shifts, the significance of phase shift modeling in successful estimation of reflectors and their strengths is demonstrated. (C) 2016 Acoustical Society of America

DOI10.1121/1.4958983
Student Publication: 
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