A global minimum traveltime raytracing algorithm of wavefront expanding with interface points as secondary sources
文献类型：期刊论文
| 作者 | Zhang Mei-Gen; Jia Yu-Ge; Wang Miao-Yue; Li Xiao-Fan |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2006-07-01 |
| 卷号 | 49期号:4页码:1169-1175 |
| 关键词 | shortest path ray tracing interface source method wavefront expanding method global minimum traveltime |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | The shortest path raytracing presented by Moser is a kind of fast and stable method to calculate global minimum traveltimes and raypaths. But it has two drawbacks. One is that most derived zig-zag raypaths are longer than true paths and thus mispositioned. The other is that there may be several equally short paths, especially in flat areas with low velocity variations. The wavefront expanding method with interface points as secondary. sources is studied in the paper which aims to solve the problems. Different from Moser's method, this approach only sets secondary sources on interfaces between different media. Rays from a secondary source can reach nodes as long as paths don't penetrate interfaces. Waves propagate along accurate paths in homogeneous layers or blocks. Obviously, there are much more ray directions from a secondary source with this method than with Moser's method. The main tracing errors only come from interface discretization. As a result, raytracing with the method can get much more accurate results than Moser's method. At the same time, the method is efficient as there are much less secondary sources than those in Moser's. Numerical examples show the method is efficient. |
| WOS关键词 | SHORTEST-PATH ; SYMPLECTIC ALGORITHM ; RAY |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000239222700032 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67109]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang Mei-Gen |
| 作者单位 | Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Mei-Gen,Jia Yu-Ge,Wang Miao-Yue,et al. A global minimum traveltime raytracing algorithm of wavefront expanding with interface points as secondary sources[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2006,49(4):1169-1175. |
| APA | Zhang Mei-Gen,Jia Yu-Ge,Wang Miao-Yue,&Li Xiao-Fan.(2006).A global minimum traveltime raytracing algorithm of wavefront expanding with interface points as secondary sources.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,49(4),1169-1175. |
| MLA | Zhang Mei-Gen,et al."A global minimum traveltime raytracing algorithm of wavefront expanding with interface points as secondary sources".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49.4(2006):1169-1175. |
入库方式： OAI收割
来源：地质与地球物理研究所
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