TRAVELTIMES IN THE MARMOUSI MODEL

[<-] [ ^ ] [->] [Previous Page] [Next Page]
Previous: BAND-LIMITED GREEN'S FUNCTIONS
Up: Maximum energy traveltimes calculated in the seismic frequecy band
Next: IMAGING THE MARMOUSI DATASET
Previous Page: BAND-LIMITED GREEN'S FUNCTIONS
Next Page: IMAGING THE MARMOUSI DATASET

TRAVELTIMES IN THE MARMOUSI MODEL

Figure 2 shows traveltime contours in the Marmousi velocity model. The top frame is a first arrival traveltime field calculated by a finite-difference solution to the eikonal equation. The center frame is a maximum amplitude traveltime field calculated by paraxial ray-tracing, the bottom frame is the maximum energy traveltime field calculated using my method. The maximum amplitude traveltime estimates are discontinuous but they are both a better fit to the significant energy in this model.

Figure 2: [*] [*][ IMAGE ]

shows a comparison of the amplitude estimates for the paraxial ray-tracing and the band-limited Green's functions. The estimate made in the seismic frequency band is much smoother and it does not show any of the instability associated with caustics that can cause problems in ray tracing.

Figure 3: [*] [*][IMAGE tex2html_wrap]