Vertical array receptions of the Heard Island transmissions
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Authors
Baggeroer, Arthur B.
Sperry, Brian
Lashkari, Khosrow
Chiu, Ching-Sang
Miller, James H.
Mikhalevsky, Peter N.
von der Heydt, Keith
Subjects
Advisors
Date of Issue
1994-10
Date
Publisher
Acoustical Society of America
Language
Abstract
A long, vertical line array was deployed off Monterey, California during the Heard Island Feasibility Test to measure the modal content of the received signals. The array contained 32, equally spaced hydrophones spanning from 345 to 1740‐m depth. The multichannel data were recorded through a tether to the R/V Point Sur. The measurements had very low signal to noise ratios and indicated the cw transmission losses were approximately 140 dB for a source/receiver range of 17 000 km. Modal content was analyzed using (i) the modal extent versus depth, (ii) frequency‐vertical wave‐number spectra, (iii) modal beamforming and (iv) least squares fitting. All led to the conclusion that the modal population is surprisingly rich. There was strong evidence of population up to at least mode seven in the data.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1121/1.410112
Series/Report No
Department
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Monterey Bay Aquarium Research Institute (MBARI)
Naval Postgraduate School (NPS)
Science Applications International Corporation (SAIC)
Naval Postgraduate School (NPS)
Science Applications International Corporation (SAIC)
Funder
Department of Energy (DOE, GrantD E-FG0291ER6110)
Format
20 p.
Citation
Baggeroer, Arthur B., et al. "Vertical array receptions of the Heard Island transmissions." The Journal of the Acoustical Society of America 96.4 (1994): 2395-2413.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.