2. Seismic/Geodetic Imaging Technologies
A Modified Grid Raytracing Method
Liguo Han(1), Dianmi Liu(1), Cai Liu(1), Yang Liu(1) and Motoyuki Sato(2)
(1) College Of Geo-Exploration Science and Technology, Jilin University, China. (2) Center for Northeast Asian Studies, Tohoku University, Japan.
Abstract
Raytracing is a approximate method which is very rapid and efficient in wave field calculation. Accurate and efficient traveltime and raypath calculation is essential for successful application of a number of near-surface imaging techniques. The grid raytracing method has incorporated two important developments in recent traveltime modeling research, that is, fast wavefront tracking and wavefront construction. So the method is more efficient than previous wavefront construction methods and more accurate than the fast marching methods in describing traveltimes and raypaths. On the basis of the grid raytracing method, this paper has improved the algorithms of the traveltime calculation. By calculations and comparisons, the modified algorithm can improve the efficiency of the grid raytracing method.
Last modified: Fri May 19 20:14:46 2006