Numerical methods are developed for the computation of Φ, the strength parameter, and A, the diffraction parameter, for arbitrary vertical sound-speed and Brunt-Vaisala frequency profiles. Normal mode solutions to the internal wave equation are obtained numerically. Conventional ray tracing using Segments of constant sound-speed gradient determines the ray paths. The ray tube method [S. Flatte et al., Sound Transmission through a Fluctuating Ocean (Cambridge U.P., Cambridge, England, 1979)] is developed and solved numerically to give the phase curvature A (x) and, in turn, used to compute A. Model computations examine the relationship between the parameters and source-receiver range and depth for canonical profile and profiles typical of the mid-latitudes in the North Atlantic and Pacific Oceans. Results are compared with the approximate forms of 0 and A given by Flatte. We find good agreement with the approximate forms for the canonical profile, but significant differences for the real profiles.
ASJC Scopus subject areas
- Arts and Humanities (miscellaneous)
- Acoustics and Ultrasonics