Prediction of the beamformed acoustic ray arrival structure for the 1992 Barents Sea coastal tomography test
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Authors
Mykyta, John L.
Subjects
tomography
eigenray
plane wave
beamformed
eigenray
plane wave
beamformed
Advisors
Chiu, Ching-Sang
Miller, James H.
Date of Issue
1993-12
Date
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In an effort to solve the forward propagation problem associated with the 1992 Barents Sea Polar Front Experiment Tomography Test, the transmission of a 224 Hz pulse signal from a near bottom sound source to a vertical hydrophone array was simulated based on three-dimensional ray theory. based on three- dimensional ray theory. Through numerical raytracing, followed by eigenray searches and estimations of ray amplitudes, searches and estimations of ray amplitudes, phases and travel times, the arrival structure as a function of time and elevation angle was constructed. The simulation was performed for both a two-dimensional and three-dimensional modeled ocean environment in order to examine the significance of three-dimensional effects. The predicted arrival structures compare well with the observed data. Three-dimensional effects proved to be significant only for the latest arrivals
Type
Thesis
Description
Series/Report No
Department
Physical Oceanography
Organization
Naval Postgraduate School
Identifiers
NPS Report Number
Sponsors
Funder
Format
39 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.