An OBS positioning mixed method based on traveltime of direct wave
Ma Detang1, Zhao Huibing1, Wu Zhongliang2
1. School of Ueological Engineering and Surveying, Chang'An University, Xi'an,Shaanxi 710064 China;
2 Guangzhou Marine Ueological Survey Bureau Guangzhou, Uuangdong 510760, China
Abstract:When the traditional three-point positioning method is used to calculate ocean bottom seismograph(OBS)based on the travel-time of direct wave,it is often found that calculated OBS positions are not unique,and sometimes they have great errors.To solve this problem,a mixed positioning method based on the travel-time of direct wave is proposed in this paper.Jointly using the three-point locating method,the least square method and searching method,the non-unique problem caused by direct wave travel-time errors, shotpoint errors of and sound wave velocity errors is solved.The optimal OBS position and the optimal sound wave velocity are found.Application results show this method is an efficient and simple way for improving OBS positioning precision.
马德堂, 赵会兵, 伍忠良. 基于直达波旅行时的OBS混合定位方法[J]. 石油地球物理勘探, 2013, 48(5): 677-681.
Ma Detang, Zhao Huibing, Wu Zhongliang. An OBS positioning mixed method based on traveltime of direct wave. OGP, 2013, 48(5): 677-681.