Abstract
Software package for ray tracing and related calculations in velocity models specified by package MODEL. Arbitrary position and shape of the source.
Arbitrary type of elementary seismic body wave corresponding to the zero-order ray theory (P, S, converted, coupled S waves). Arbitrary acquisition schemes including surface seismics, vertical seismic profiling, cross-hole, ocean bottom.
Isotropic-ray-theory rays in layered and block velocity models, anisotropic-ray-theory P-wave rays and anisotropic common S-wave rays in smooth velocity models. Initial-value ray tracing by numerical integration of ray tracing equations.
Two-point ray tracing by the shooting method based on ray histories. Travel-time computation, dynamic ray tracing, paraxial-ray propagator matrix, geometrical spreading, vectorial amplitudes, polarization vectors.
The package may be applied to the evaluation of the elastodynamic ray-theory Green function, and to computation of synthetic seismograms, including the coupling ray theory along isotropic or anisotropic common S-wave rays and the response of fine layers at receiver sites (program package RMATRIX by C.J. Thomson, linked to the CRT package).
Least-square travel-time tomography with smoothing using Sobolev scalar products. VRML and GOCAD visualization.