【摘要】 海洋广角地震数据的采集具有高投入、高风险及高难度等特点,这使得从海洋上采集到的地震数据显得异常宝贵,但往往由于各种客观条件(如气候条件、定时定位条件、仪器条件及人为因素等)的限制,导致采集到的地震数据存在一些缺陷。以南海地区开展的海陆地震联测及海底地震仪(OBS)探测的试验数据为例,对导航数据时间误差、部分陆地固定台站的时间误差、海底地震仪定位偏差等问题进行了分析,并提出了具体的数据校正方法,同时对这些校正方法的原理也进行了相应的分析和探讨。从校正后的结果看,原本存在明显问题的数据得到了有效解决,为更深入地解决海洋人工地震数据存在的各种问题提供了技术路线。更多还原

【Abstract】 The wide angle seismic data from the sea are very valuable because of the difficulties,costliness and risks in obtaining them.But these data could include some problems which result from weather,bad instrument,jamming,and so on.This paper analyzed and corrected the locations and time of OBSs,seismic stations and navigation data,based on our recently obtained onshore-offshore seismic data and OBS data in the northern South China Sea.We put forward different corrected methods according to different problems,and illuminated their principles.Results after corrections show that the problems existing in original data were well solved,and data after corrections could be used to study the crustal structures.This study can enlighten us to better solve diverse problems potentially existing in the wide angle seismic data from the sea.更多还原