Time record and accurate correction of Chinese OBS raw data

doi:10.6038/cjg2019L0715

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院油气资源研究重点实验室

	Time record and accurate correction of Chinese OBS raw data
	Zhang HaoYu 1,3; Qiu XueLin 1,3; Zhang JiaZheng 1; He EnYuan 1; You QingYu 2
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2019
卷号	62 期号:1 页码:172-182
关键词	Ocean Bottom Seismometer (OBS) OBS time record Internal file time drift Sampling interval
ISSN号	0001-5733
DOI	10.6038/cjg2019L0715
英文摘要	Time record of the Ocean Bottom Seismometer (OBS) is crucial for data processing. Larger internal time drift errors were discovered in some Chinese portable OBSs, which result in "stair" or "incline" events on observed seismic record sections. We designed zero-offset experiments to verify these abnormal phenomena, confirming that they are caused by internal time drift of data files as well as some bugs existing in data processing programs. According to the statistics, internal file time drift of A or B-type OBS at the preset sampling rate of 250 Hz is between 0 and 40 ms, while this drift of L or S-type at 100 Hz is between 0 and 90 ms, which can affect OBS data processing and structural simulation. We corrected this time error by means of actual sampling interval calculation, sampling interval adjustment and data re-sampling. Some modifications were also made to relevant OBS data processing programs. Our research promotes the awareness of time records of OBS data, acquires the regularity of internal file time drift variation, and highlights the accurate correction of the intermediate and larger extent of this time error. Our work improves the OBS data processing steps and flow chart, makes a significant supplement for effective utilization of OBS data, and provides an important reference for extensive use and development of domestic OBSs.
WOS关键词	SEA
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000457640700013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/90526]
专题	地质与地球物理研究所_中国科学院油气资源研究重点实验室
通讯作者	Qiu XueLin
作者单位	1.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resources Res, Beijing 100029, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang HaoYu,Qiu XueLin,Zhang JiaZheng,et al. Time record and accurate correction of Chinese OBS raw data[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(1):172-182.
APA	Zhang HaoYu,Qiu XueLin,Zhang JiaZheng,He EnYuan,&You QingYu.(2019).Time record and accurate correction of Chinese OBS raw data.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(1),172-182.
MLA	Zhang HaoYu,et al."Time record and accurate correction of Chinese OBS raw data".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.1(2019):172-182.