Abstract
The phase-screen (split-step) method is widely used for modeling wave propagation in inhomogeneous media. The method of plane phase screens is best known. However, for modeling a 2D problem of radio occultation sounding of the Earth’s atmosphere, the method of cylindrical phase screen was developed many years ago. In this paper, we propose a further generalization of this method for the 3D problem on the basis of spherical phase screens. In the paraxial approximation, we derive the formula for the vacuum screen-to-screen propagator. We also infer the expression for the phase thickness of a thin layer of aisotropic random media. We describe a numerical implementation of this method and give numerical examples of its application for modeling a diverging laser beam propagating on a 25-km-long atmospheric path.
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This work was financially supported by the Russian Foundation for Basic Research (grant no. 18-35-00368).
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Translated by V. Selikhanovich
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Gorbunov, M.E., Koval, O.A. & Mamontov, A.E. Method of Spherical Phase Screens for Modeling the Propagation of Diverging Beams in Inhomogeneous Media. Izv. Atmos. Ocean. Phys. 56, 52–60 (2020). https://doi.org/10.1134/S0001433820010041
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DOI: https://doi.org/10.1134/S0001433820010041