"Tessmer, E." . . "0039-3169" . "10.1007/s11200-010-0086-7" . "RIV/67985530:_____/12:00365261" . "Comparison of the FORT approximation of the coupling ray theory with the Fourier pseudospectral method"@en . "The standard ray theory (RT) for inhomogeneous anisotropic media does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities. In both cases, the two shear waves propagate with similar phase velocities. The coupling ray theory was proposed to avoid this problem. In it, amplitudes of the two S waves are computed by solving two coupled, frequency-dependent differential equations along a common S-wave ray. In this paper, we test the recently developed approximation of coupling ray theory (CRT) based on the common S-wave rays obtained by first-order ray tracing (FORT)."@en . "Farra, V." . . . . . . . . "Studia geophysica et geodaetica" . . "P(GAP210/11/0117), Z(AV0Z30120515)" . "1" . . "30"^^ . "CZ - \u010Cesk\u00E1 republika" . "coupling ray theory; Fourier pseudospectral method; first-order ray tracing"@en . "RIV/67985530:_____/12:00365261!RIV13-AV0-67985530" . "000301037400004" . "1"^^ . "Comparison of the FORT approximation of the coupling ray theory with the Fourier pseudospectral method" . "56" . . "[8A6A704E8D70]" . . . "3"^^ . . "P\u0161en\u010D\u00EDk, Ivan" . "Comparison of the FORT approximation of the coupling ray theory with the Fourier pseudospectral method"@en . . . "128057" . . "Comparison of the FORT approximation of the coupling ray theory with the Fourier pseudospectral method" . "The standard ray theory (RT) for inhomogeneous anisotropic media does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities. In both cases, the two shear waves propagate with similar phase velocities. The coupling ray theory was proposed to avoid this problem. In it, amplitudes of the two S waves are computed by solving two coupled, frequency-dependent differential equations along a common S-wave ray. In this paper, we test the recently developed approximation of coupling ray theory (CRT) based on the common S-wave rays obtained by first-order ray tracing (FORT)." . .