Arrival time tracking of partially resolved acoustic rays with application to ocean acoustic tomography.
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Authors
Chaulk, Edwin K.
Subjects
Acoustics Tomography
Adaptive Spectral Estimation
Monterey Bay
Multipath Resolution
Adaptive Spectral Estimation
Monterey Bay
Multipath Resolution
Advisors
Miller, James H.
Hippenstiel, Ralph
Date of Issue
1991-03
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
Accurate estimation of arrival times along an ocean acoustic ray path is an
important component of ocean acoustic tomography. A straightforward method of
arrival time estimation, based on locating the maximum value of an interpolated
arrival, was used with limited success for analysis of data from the December 1988
Monterey Bay Tomography Experiment. Close examination of the data revealed
multiple closely spaced arrivals of similar amplitude, only partially resolved in many
returns. A modification to the original tracking algorithm succeeded in improving
the estimates and lead to the development of a tracker based on a least mean squares
(LMS) linear predictive filter. A second algorithm, based on a modified recursive
least squares (MRLS) solution, allows the estimation of dynamic spectral processes
at surface and internal wave frequencies in the tomography arrivals.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
143 p.;28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.