A ray tracing method based on improved linear traveltime interpolation

被引：0
作者：
Zhang Dong [1 ,2 ]
Xie Bao-Lian [1 ]
Yang Yan [1 ]
Fu Xiang-Ru [1 ]
Qin Qian-Qing [2 ]
机构：
[1] Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Natl Engn Res Ctr Multimedia Software, Wuhan 430072, Peoples R China
来源：
CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION | 2009年 / 52卷 / 01期
关键词：
Ray tracing; Linear traveltime interpolation; Minimum traveltime; ALGORITHM;
D O I：
暂无
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
Grid point traveltimes calculated by linear traveltime interpolation (LTI) are not always the minimum values for not considering all the possible ray directions. It induces that Fermat condition of minimum traveltime can not be really satisfied in ray tracing. In the paper an improved method for ray tracing is presented to solve this problem. By making use of multidirectional loop computation the minimum traveltimes of all grid points are obtained, which will conform the traced ray path to the condition of minimum traveltime. The tracing precision can be ensured in this way. The calculation examples show that the improved method can increase the precision effectively comparing with the traditional LTI in the velocity structure of great difference.
引用
收藏
页码：200 / 205
页数：6
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