Precise Positioning Method for Seafloor Geodetic Stations Based on the Temporal Variation of Sound Speed Structure

作     者：Shuang ZHAO Zhenjie WANG Zhixi NIE Kaifei HE Huimin LIU Zhen SUN Shuang ZHAO;Zhenjie WANG;Zhixi NIE;Kaifei HE;Huimin LIU;Zhen SUN

作者机构：Chinese Academy of Surveying and MappingBeijing 100036China College of Oceanography and Space InformaticsChina University of Petroleum(East China)Qingdao 266580China Qingdao Institute of Marine GeologyChina Geological SurveyQingdao 266237China 

出 版 物：《Journal of Geodesy and Geoinformation Science》 (测绘学报（英文版）)

年 卷 期：2023年第6卷第2期

页      面：81-92页

核心收录：

学科分类：081802[工学-地球探测与信息技术] 08[工学] 081105[工学-导航、制导与控制] 0818[工学-地质资源与地质工程] 0804[工学-仪器科学与技术] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术] 0811[工学-控制科学与工程] 

基　　金：National Natural Science Foundation of China(Nos.41931076,42174020) Laoshan Laboratory(No.LSKJ202205101) State Key Laboratory of Geo-Information Engineering(No.SKLGIE2020-M-1-1) 

主　　题：GNSS-Acoustic sound speed structure temporal variation seafloor positioning 

摘      要：At present,GNSS-Acoustic(GNSS-A)combined technology is widely used in positioning for seafloor geodetic *** on Sound Velocity Profiles(SVPs)data,the equal gradient acoustic ray-tracing method is applied in high-precision position ***,because of the discreteness of the SVPs used in the forementioned method,it ignores the continuous variation of sound velocity structure in time domain,which worsens the positioning *** this study,the time-domain variation of Sound Speed Structure(SSS)has been considered,and the cubic B-spline function is applied to characterize the perturbed sound *** on the ray-tracing theory,an inversion model of“stepwise iteration&progressive correctionsfor both positioning and sound speed information is proposed,which conducts the gradual correction of seafloor geodetic station coordinates and disturbed sound *** practical data was used to test the effectiveness of our *** results show that the Root Mean Square(RMS)errors of the residual values of the traditional methods without sound velocity correction,based on quadratic polynomial correction and based on cubic B-spline function correction are 1.43 ms,0.44 ms and 0.21 ms,*** inversion model with sound velocity correction can effectively eliminate the systematic error caused by the change of SSS,and significantly improve the positioning accuracy of the seafloor geodetic stations.