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- W2042254550 abstract "The validity of the axisymmetric parabolic-equation (PE) method for line-of-sight sound propagation in a turbulent atmosphere is investigated. The axisymmetric PE method is a finite-difference method for solving a 2D parabolic wave equation, which follows from the 3D wave equation by the assumption of axial symmetry around the vertical axis through the source. It is found that this axisymmetric approximation has a considerable spurious effect on the fluctuations of the sound field. This is concluded from analytical expressions for the log-amplitude and phase variances, derived both for isotropic turbulence and for axisymmetric turbulence. The expressions for axisymmetric turbulence are compared with the results of numerical computations with the PE method." @default.
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- W2042254550 date "2000-10-01" @default.
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- W2042254550 title "Fluctuations of spherical waves in a turbulent atmosphere: effect of the axisymmetric approximation in computational methods" @default.
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- W2042254550 doi "https://doi.org/10.1121/1.1289670" @default.
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