Summary
Among the various dynamic ray tracing systems described by Červený and Hron[1] is one particular linear system of second order that readily provides identical parameters (in the ray centred coordinate system) to those that fall out of the system by Popov and Pšenčík[3, 4]. Hence the initial conditions of the latter system for sources and interfaces can easily be used to provide those for the linear system of second order.
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References
V. Červený, F. Hron: The Ray Series Method and Dynamic Ray Tracing System for Three Dimensional Inhomogeneous Media. B.S.S.A., 70 (1980), 47.
P. Hubral: A Wave Front Curvature Approach to Computing Ray Amplitudes in Inhomogeneous Media with Curved Interfaces. Studia geoph. et geod., 23 (1979), 131.
M. M. Popov, I. Pšenčík: Ray Amplitudes in Inhomogeneous Media with Curved Interfaces. Travaux Inst. Geophys. Acad. Tchécosl. Sci. No. 454, Geofysikální sborník 1976. Academia, Praha 1978.
M. M.Popov, I. Pšenčík: Computation of Ray Amplitudes in Inhomogeneous Media with Curved Interfaces. Studia geoph. et geod., 22 (1978), 248.
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Hubral, P. On dynamic ray tracing in three dimensional inhomogeneous media. Stud Geophys Geod 24, 317–318 (1980). https://doi.org/10.1007/BF01634140
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DOI: https://doi.org/10.1007/BF01634140