Eigenray tracing in an ocean using Fermat's principle

Shashidhar, N. S. ; Anand, G. V. (1995) Eigenray tracing in an ocean using Fermat's principle Journal of Sound and Vibration, 186 (2). pp. 231-243. ISSN 0022-460X

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1006/jsvi.1995.0446


A novel numerical approach is presented for solving the problem of three-dimensional eigenray tracing in an ocean channel. A variational method is developed based on Fermat's principle which yields eigenrays directly without having to search for a ray which reaches the receiver. The algorithm yields "true" Fermat rays: i.e., eigenrays for which the travel-time is stationary rather than minimal. The numerical results included in this paper show the algorithm to be more accurate and faster than a method based on Snell's law.

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