On the Sign of the Waveguide Invariant
Published In
OCEANS 2016 - Shanghai
Document Type
Citation
Publication Date
6-9-2016
Abstract
Acoustic propagation in the ocean waveguide is characterized by mutual interference between the multiple ray paths connecting a source-receiver pair. In the Russian literature, these interference effects have been distilled mathematically into a single parameter, the so-called waveguide invariant defined as beta. The conventional wisdom is that the numerical value of beta is negative in deep water and positive in shallow water. In the present work, it is shown how the waveguide invariant can bifurcate and simultaneously have both positive and negative components. When bifurcation occurs, range-frequency mappings of acoustic intensity become fragmented. A method to separate the positive-beta components from the negative is sketched and applied to simulated data. Possible applications are discussed.
Locate the Document
DOI
10.1109/OCEANSAP.2016.7485368
Persistent Identifier
http://archives.pdx.edu/ds/psu/20203
Citation Details
D. Rouseff and L. M. Zurk, "On the sign of the waveguide invariant," OCEANS 2016 - Shanghai, Shanghai, 2016, pp. 1-4.