Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999geoji.139..273b&link_type=abstract
Geophysical Journal International, Volume 139, Issue 2, pp. 273-282.
Astronomy and Astrophysics
Astronomy
3
Inhomogeneous Media, Ray Theory, Ray Tracing, Seismic Modelling, Wave Propagation, Traveltime
Scientific paper
3-D ray tracing followed by interpolation of the computed quantities amongst the rays is a powerful tool for the computation of ray theory traveltimes, amplitudes and other quantities at the gridpoints of dense rectangular grids. Several methods based on the decomposition of the model volume into ray cells, and on further interpolation within the individual ray cells, have recently been introduced. We propose bilinear and bicubic interpolation schemes, which should be applicable in any modelling method based on interpolation within ray cells. The bicubic interpolation is designed for traveltimes and the bilinear interpolation for other quantities. The interpolation schemes have been incorporated into a controlled initial-value ray tracing program package. Multivalued ray theory traveltime computation in a heterogeneous 3-D model is shown as an example.
Bulant Petr
Klimes Ludek
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