Record details

Title
    Comparison of the FORT approximation of the coupling ray theory with the Fourier pseudospectral method
Author
    Farra, V.
    Pšenčík, Ivan
    Tessmer, E.
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Studia geophysica et geodaetica
Vol./nr.
    Roč. 56, č. 1
Pages
    s. 35-64
Year
    2012
Notes
    Projekt: GAP210/11/0117, GA ČR, CZ3cav_un_auth*0273502
    Rozsah: 30 s. : P
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    coupling ray theory
    first-order ray tracing
    Fourier pseudospectral method
Keyword
    Approximation
    Comparison
    Coupling
    FORT
    Fourier
    Method
    Pseudospectral
    Ray
    Theory
Abstract (in english)
   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).
Contributor
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
    U
Import date
    9. 12. 2013