Ray chaos of underwater sound in long-range propagation

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.51020· OSTI ID:397379

Yan, J; Yen, K K ^[1]

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1. Dept. of Electrical and Computer Engineering, Florida International University, Miami, Florida 33199 (United States)

Palmer, {ital et} {ital al}. (Geophysical Research Letters, Vol. 15, No. 6, 1988, 596{endash}572) have shown that acoustic ray paths in a weakly range-dependent deterministic ocean model exhibit chaotic behavior. The objective of this paper is to investigate whether ray paths in a realistic ocean-acoustic problem are chaotic. To achieve this goal, measured sound speed data and Munk, {ital et} {ital al}.{close_quote}s horizontal ray equations, which take into account earth{close_quote}s curvature and flattening, are used to study sound propagation from Heard Island to Ascension Island. Along with the integration of the ray equations, Lyapunov exponents are calculated to identify chaos. Numerical results show that all the horizontal ray paths we construct were chaotic. Predictability limitations due to the chaos are discussed. {copyright} {ital 1996 American Institute of Physics.}

• OSTI ID: 397379
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 375; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CHAOTIC SYSTEMS
DYNAMICS
GEOMETRICAL ACOUSTICS
INDIAN OCEAN
INITIAL CONDITIONS
RAY TRAJECTORIES
SOUND VELOCITY
SOUND WAVES
UNDERWATER
WAVE PROPAGATION