Ray-based description of normal mode amplitudes in a range-dependent waveguide

Details Ray-based description of normal mode amplitudes in a range-dependent waveguide Ray-based description of normal mode amplitudes in a range-dependent waveguide

2004-12-28

arxiv.org/abs/physics/0412170v1

Physics

Atmospheric and Oceanic Physics

11 pages, 5 figures

Scientific paper

10.1134/1.1640721

An analogue of the geometrical optics for description of the modal structure of a wave field in a range-dependent waveguide is considered. In the scope of this approach the mode amplitude is expressed through solutions of the ray equations. This analytical description accounts for mode coupling and remains valid in a nonadiabatic environment. It has been used to investigate the applicability condition of the adiabatic approximation. An applicability criterion is formulated as a restriction on variations of the action variable of the ray.

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