Signal transfer and noise level of Ocean Bottom Seismometers

doi:10.6038/cjg2019M0569

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

	Signal transfer and noise level of Ocean Bottom Seismometers
	Wang Sun 1,2,3; Qiu XueLin 2,3; Zhao MingHui 2,3; Li PuChun 1,4; Liu LiHua 5; Zhang YiFeng 1; Xie ZhiZhao 1
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2019-08-01
卷号	62 期号:8 页码:3199-3207
关键词	Ocean Bottom Seismometer Signal to Noise Ratio Signal transfer Noise level
ISSN号	0001-5733
DOI	10.6038/cjg2019M0569
英文摘要	Due to the features of low cost, small volume and easy to operate, single-sphere type OBSs are widely used in active and passive seismic observation. We check the OBS data in West Taiwan Strait and conclude that : Signal to Noise Ratio (SNR) of the hydrophone (H-component) usually greater than that of the vertical component geophone (Z-component) of the same OBS. Because the two types of detectors are designed to monitor the vertical movement of the seabed, we suggest that the significant difference between the two SNRs is related to the instrument characteristics. This paper makes analysis on the low SNR of Z-component by two ways : the signal transfer and the noise level. To determine the coupling of geophones and shell, we measure and analyze the seismograms of three broadband OBS in the same batch, together with two broadband land seismographs (CMG40-TDE) as a frame of reference. Our results show that there exist large variations of the internal damper not only between the OBSs, but also between the three components of the same OBS. Attempting to discern the cause of the noise levels, we analyze the noises recorded by the same OBS in 7 different sites. The results show that the geophones are sensitive to the secondary disturbances in shallow water zone. We pinpoint that the internal coupling and the secondary water disturbances significantly affect the data quality of OBS and the outcome of multi-component exploration, which did not get deserved concern before. This study proposes an important developing direction for the architecture design and manufacturing technology of OBS, and provides a good reference for the multi-component seismic processing of OBS data.
WOS关键词	OBS DATA ; SEA ; ANISOTROPY ; DESIGN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000480300600033
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93335]
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.Fujian Earthquake Agcy, Xiamen Ctr Seism Survey, Xiamen 361021, Fujian, Peoples R China 2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Guangdong Earthquake Agcy, Guangzhou 510070, Guangdong, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Petr Resource Res, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang Sun,Qiu XueLin,Zhao MingHui,et al. Signal transfer and noise level of Ocean Bottom Seismometers[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2019,62(8):3199-3207.
APA	Wang Sun.,Qiu XueLin.,Zhao MingHui.,Li PuChun.,Liu LiHua.,...&Xie ZhiZhao.(2019).Signal transfer and noise level of Ocean Bottom Seismometers.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,62(8),3199-3207.
MLA	Wang Sun,et al."Signal transfer and noise level of Ocean Bottom Seismometers".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 62.8(2019):3199-3207.