Cart (Loading....) | Create Account
Close category search window
 

Anisotropy of the Wavefront Distortion for Acoustic Pulse Propagation Through Ocean Sound-Speed Fluctuations: A Ray Perspective

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Flatte, S.M. ; Dept. of Phys., Univ. of California, Santa Cruz, CA, USA ; Colosi, J.A.

Observations of broadband sound propagation through the deep ocean, rich in sound-speed inhomogeneities, show that the double accordion acoustic wavefront pattern expected from model predictions without inhomogeneities is remarkably stable. This stability is found for propagation ranges up to 5000 km for acoustic frequencies of 28-84 Hz, and up to 1200-km range for 250 Hz. While the observed wavefront pattern is stable, the acoustic intensity along the wavefront is not. Furthermore, significant vertical extension of turning point caustics has been observed. This line of evidence suggests that the scattering is anisotropic in the sense that it is primarily along the wavefront, rather than across it. In addition, ray and parabolic equation simulations of acoustic propagation through ocean internal waves obeying the Garrett-Munk (GM) internal wave spectrum reinforce this notion of the anisotropy of the wavefront distortion. This paper presents a ray-based physical model for this phenomenon based on small angle forward scattering and provides analytic formulas to predict the wavefront distortions caused by ocean internal waves and other ocean processes. Further applications include out-of vertical-plane scattering and wavefront healing near seamounts or islands.

Published in:

Oceanic Engineering, IEEE Journal of  (Volume:33 ,  Issue: 4 )

Date of Publication:

Oct. 2008

Need Help?


IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.