caa a22 4500 477047017 CHVBK 20180405111333.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00874577 doi (NATIONALLICENCE)springer-10.1007/BF00874577 Brokešová Johana Department of Geophysics, Faculty of Methamatics and Physics, Charles University, Ke Karlovu 3, 121 16, Praha 2, Czech Republic aut Construction of ray synthetic seismograms using interpolation of travel times and ray amplitudes [Elektronische Daten] [Johana Brokešová] The seismic wave field, in its high-frequency asymptotic approximation, can be interpolated from a low- to a high-resolution spatial grid of receivers and, possibly, point sources by interpolating the eikonal (travel time) and the amplitude. These quantities can be considered as functions of position only. The travel time and the amplitude are assumed to vary in space only slowly, otherwise the validity conditions of the theory behind would be violated. Relatively coarse spatial sampling is then usually sufficient to obtain their reasonable interpolation. The interpolation is performed in 2-D models of different complexity. The interpolation geometry is either 1-D, 2-D, or 3-D according to the source-receiver distribution. Several interpolation methods are applied: the Fourier interpolation based on the sampling theorem, the linear interpolation, and the interpolation by means of the paraxial approximation. These techniques, based on completely different concepts, are tested by comparing their results with a reference ray-theory solution computed for gathers and grids with fine sampling. The paraxial method holds up as the most efficient and accurate in evaluating travel times from all investigated techniques. However, it is not suitable for approximation of amplitudes, for which the linear interpolation has proved to be universal and accurate enough to provide results acceptable for many seismological applications. Birkhäuser Verlag, 1996 Ray method nationallicence paraxial ray approximation nationallicence sampling theorem nationallicence pure and applied geophysics Birkhäuser-Verlag 148/3-4(1996-09-01), 503-538 0033-4553 148:3-4<503 1996 148 24 https://doi.org/10.1007/BF00874577 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00874577 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Brokešová Johana Department of Geophysics, Faculty of Methamatics and Physics, Charles University, Ke Karlovu 3, 121 16, Praha 2, Czech Republic aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 148/3-4(1996-09-01), 503-538 0033-4553 148:3-4<503 1996 148 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer