The correction of shot and OBS position in the 3D seismic experiment of the SW Indian Ocean Ridge
文献类型：期刊论文
| 作者 | Ao, W ; Zhao, MH ; Qiu, XL ; Li, JB ; Chen, YS ; Ruan, AG ; Li, SJ ; Zhang, JZ ; Wu, ZL ; Niu, XW |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2010 |
| 卷号 | 53期号:12页码:2982-2991 |
| ISSN号 | 0001-5733 |
| 关键词 | Ocean Bottom Seismometer OBS relocation 3D seismic experiment SW Indian Ocean Ridge |
| 通讯作者 | aowei100@163.com ; mhzhao@scsio.ac.cn |
| 中文摘要 | In a three-dimensional (3-D) seismic experiment carried out at sea, due to the distance between GPS antenna on ship and the center of air gun sources in sea water, and some environmental factors such as wind and sea current, the survey ship would adjust its heading direction which causes the shot's real position to deviate from presupposed shot track; meanwhile, real locations of OBSs on the seafloor would drift from designed points (deployed locations) since OBSs are of free-fall type and are usually affected by sea current during descending. So, the calibration of air gun shot and Ocean Bottom Seismometer (OBS) locations are basic steps for later studies on fine seismic velocity tomography. Our research focuses on the correction of shot and OBS positions with latest data from a new 3D seismic experiment in the SW Indian Ocean Ridge. The shot positions were corrected with geometric relationship among ship's heading, GPS antenna and the air gun array. The correction of OBS positions was based on travel times of direct water waves, and Monte Carlo and Least Square Methods were adopted. In addition, we discuss the relationship between reduced travel time curve of direct water wave and OBS deviation. Our results show that OBS locations generally drifted from the design points about 1 km, with an error range of 0 similar to 20 m and shots were adjusted to their actual positions. The research results do not only supply a fundamental database for the 3D seismic tomography in SW Indian Ocean Ridge, but also provide valuable experiences for 3D seismic survey in the South China Sea in future. |
| 学科主题 | Geochemistry & Geophysics |
| 收录类别 | SCI |
| 原文出处 | SCIENCE CHINA PRESS |
| WOS记录号 | WOS:000285862200022 |
| 公开日期 | 2011-07-03 |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/4296]  |
| 专题 | 南海海洋研究所_中科院边缘海地质重点实验室 |
| 推荐引用方式 GB/T 7714 | Ao, W,Zhao, MH,Qiu, XL,et al. The correction of shot and OBS position in the 3D seismic experiment of the SW Indian Ocean Ridge[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2010,53(12):2982-2991. |
| APA | Ao, W.,Zhao, MH.,Qiu, XL.,Li, JB.,Chen, YS.,...&Niu, XW.(2010).The correction of shot and OBS position in the 3D seismic experiment of the SW Indian Ocean Ridge.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,53(12),2982-2991. |
| MLA | Ao, W,et al."The correction of shot and OBS position in the 3D seismic experiment of the SW Indian Ocean Ridge".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 53.12(2010):2982-2991. |
入库方式： OAI收割
来源：南海海洋研究所
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