Array invariant-based source localization in shallow water using a sparse vertical array

TitleArray invariant-based source localization in shallow water using a sparse vertical array
Publication TypeJournal Article
Year of Publication2017
AuthorsSong H.C, Cho C
JournalThe Journal of the Acoustical Society of America
Volume141
Pagination183-188
Date Published2017/04
Keywordsacoustic radiators
Abstract

The array invariant proposed for robust source localization in shallow water exploits the beam-time migration of broadband signals. The approach requires minimal knowledge of the environment, but involves plane wave beamforming using a short-aperture vertical array in stratified acoustic waveguides. In this paper, the array invariant approach is extended to a large-aperture vertical array that is sparse with significant variation of the sound speed across the aperture for conventional beamforming. The extension is feasible because the array invariant in shallow water utilizes surface/bottom-reflected arrivals that behave like those in ideal waveguides. Robust source-range estimation is demonstrated using data from a 16-element, 56-m long vertical array at various ranges (1.5–3.5 km) from a broadband source (0.5–2 kHz) in approximately 100-m deep shallow water.

DOI10.1121/1.4973812
Student Publication: 
No
Research Topics: 
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