一种确定海底地震仪位置与等效海水速度的多维扫描法OA北大核心CSTPCD
A multi-dimensional scanning method of locating ocean bottom seismometer and determining equivalent seawater velocity
受海流影响,海底地震仪(OBS及OBN)着底点与投放点的位置存在偏差,水越深偏差越大.OBS及OBN的准确定位对后续地震数据的成像处理至关重要.传统处理方法假设海水速度、海底深度已知,或者采用分部策略依次反演海水速度、海底深度与水平坐标,导致误差较大.为此,提出了一种新的OBS及OBN重定位多维扫描方法.利用共检波点道集中拾取的海水直达波震相到达时,经过在水平坐标(x维度和y维度)、海底深度和海水速度4个维度的扫描,确定OBS及OBN着底位置的同…查看全部>>
Owing to the flow of sea water,the landing position of an ocean bottom seismometer(OBS and OBN)usually deviates from its launching coordinates,and the deviation increases with water depth.Accurate repositioning is important to subsequent data processing and imaging.In a routine practice,seawater velocity and seafloor depth are supposed to be known or inverted separately,followed by horizontal repositioning;thus the error is usually noticeable.To solve this p…查看全部>>
李华;刘佳仪
同济大学图书馆,上海 200092长江大学工程技术学院,湖北荆州 434022
地质学
海底地震仪(OBS)OBS及OBN重定位海底深度等效海水速度海水直达波
Ocean Bottom Seismometer(OBS)OBS and OBN repositioningseafloor depthequivalent seawater velocityseawater transmitted wave
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61-68,8
国家自然科学基金项目(41930105)资助.This research is financially supported by the National Natural Science Foundation of China(Grant No.41930105).
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