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- W2013722130 abstract "The wave equation for propagation of sound waves through random oceanic inhomogeneities is expressed in a special coordinate system that follows the ray path of the deterministic wave that would propagate in the absence of randomness. The ratio of the full wave field in the presence of random inhomogeneities to the deterministic wave field is shown to satisfy the parabolic wave equation with acoustic wavelength depending on position along the ray. This approximation requires that the local sound speed be only slightly perturbed from its local deterministic value, although it may be very much different from the sound speed at a distant point on the deterministic ray. No matter how tortuous the path of the deterministic field, this parabolic equation holds provided that the angles between the rays of the full field and rays of the deterministic field are small. The equations for moments of the field (mean field, mutual coherence function, fourth moment) have a form very similar to the case of uniform mean sound speed. The numerical solution of these random-medium propagation equations is conceptually simple." @default.
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- W2013722130 date "1984-05-01" @default.
- W2013722130 modified "2023-09-27" @default.
- W2013722130 title "Generalized parabolic wave equation and field‐moment equations for random media having spatial variation of mean sound speed" @default.
- W2013722130 doi "https://doi.org/10.1121/1.2021352" @default.
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