A study of hybrid and chaotic long-range propagation in a double sound channel environment

Author

Noel, Claire ; Viala, Christophe ; Stephan, Yann

Author_Institution

Semantic TS, Sanary, France

Volume

24

Issue

4

fYear

1999

fDate

10/1/1999 12:00:00 AM

Firstpage

447

Lastpage

457

Abstract

This paper presents the results of the analysis of long range propagation (~200 km) in a range-dependent environment. The propagation medium is characterized by two deep sound channels. The range dependence enables energy transfer between the channels and leads to a mismatch between real data and ray predictions. To explain this mismatch, an analysis of hybrid ray propagation is presented. This analysis is completed by an interpretation in terms of chaos. This chaos is quantified in the particular case of the Bay of Biscay environment. This paper puts forward that mesoscale perturbations, such as the Mediterranean outflow in the North Atlantic, can affect long-range propagation. However, it shows that the ray theory remains reliable for a propagation range of several hundred kilometers

Keywords

acoustic signal processing; chaos; oceanographic techniques; underwater acoustic propagation; 200 km; Bay of Biscay; Mediterranean outflow; North Atlantic; chaos; chaotic long-range propagation; deep sound channels; double sound channel environment; energy transfer; hybrid long-range propagation; hybrid ray propagation; long range propagation; mesoscale perturbations; mismatch; range-dependent environment; ray theory; Acoustic propagation; Acoustic testing; Chaos; Energy exchange; Helium; Large-scale systems; Ocean temperature; Reliability theory; Tires; Tomography;

fLanguage

English

Journal_Title

Oceanic Engineering, IEEE Journal of

Publisher

ieee

ISSN

0364-9059

Type

jour

DOI

10.1109/48.809264

Filename

809264