| OBS记录的时间和定位误差校正 |
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| 引用本文： | 王彦林,阎贫,郑红波,吕修亚.OBS记录的时间和定位误差校正[J].热带海洋学报,2007,26(5):40-46. |
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| 作者姓名： | 王彦林 阎贫 郑红波 吕修亚 |
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| 作者单位： | 1. 中国科学院边缘海地质重点实验室,中国科学院南海海洋研究所,广东,广州,510301;中国科学院研究生院,北京,100049
2. 中国科学院边缘海地质重点实验室,中国科学院南海海洋研究所,广东,广州,510301 |
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| 基金项目： | 中国科学院知识创新工程项目;国家海洋局重点实验室基金 |
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| 摘 要： | 根据地震波传播的时距关系,利用海底地震仪子母钟对时记录、测深数据和近炮点数据,使用数据处理软件OBSTOOL,对南海北部采集的海底地震记录进行高精度时钟校正处理。通过反演确定放炮延迟和海底地震仪的漂移参数,为准确反演速度奠定了基础。分析结果显示,南海北部OBS数据放炮延迟为1.278s,最大时钟校正量为2.394 s,OBS偏离测线最大距离为652m,这些将会导致浅层正、反演结果不准确,影响BSR的正确识别。
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| 关 键 词： | 海底地震仪记录 时钟校正 放炮延迟校正 落点位置反演 |
| 文章编号： | 1009-5470（2007）05-0040-07 |
| 收稿时间： | 2007-01-20 |
| 修稿时间： | 2007-03-13 |
Timing and positioning corrections of ocean bottom seismograph data |
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| WANG Yan-lin,YAN-Pin,ZHENG Hong-bo,L Xiu-ya.Timing and positioning corrections of ocean bottom seismograph data[J].Journal of Tropical Oceanography,2007,26(5):40-46. |
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| Authors: | WANG Yan-lin YAN-Pin ZHENG Hong-bo L Xiu-ya |
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| Institution: | 1. Key Laboratory of Marginal Sea Geology, CAS/South China Sea Institute of Oceanology, CAS, Guangzhou 510301, China 2. Graduate Univ. of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Based on the time-distance equation and by the OBSTOOL software,high-precision clock correction for ocean bottom seismograph(OBS)data from the northern South China Sea is processed using clock file,depth recorder and nearoffset OBS data.Exact shot delay and drift values are determined by the inversion,establishing the base of accurate velocity inversion.The analysis result showed that the shot delay is 1.278s,the largest clock correction is 2.394s,and the largest deviation from the profile is about 652m,which may cause the inaccuracy of forwarding and inversion for the velocity structure in shallow layers and affect the identification of bottom simulating reflection(BSR). |
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| Keywords: | ocean bottom seismograph(OBS) data clock correction shot delay correction inversion for OBS location |
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