石油地球物理勘探2025，Vol.60Issue(2)：310-320,11.DOI:10.13810/j.cnki.issn.1000-7210.20240154
基于双程声径的海底控制点GNSS-A双差定位方法
GNSS-A double-difference positioning method based on round-trip acoustic path for seafloor control points
摘要
Abstract
The traditional single-difference positioning model based on a round-trip acoustic path does not take into account the time delay error of the transducer.Considering the positional change of the transducer at the mo-ments of transmitting and receiving acoustic signals,this paper proposes a global navigation satellite system-acous-tic(GNSS-A)double-difference positioning method based on a round-trip acoustic path for seafloor control points.Taking the total round-trip time of the signal as the observation value,the method performs the first difference be-tween the seafloor control points and then the second difference between observation epochs,in order to reduce the influence of the system error on positioning.Simulated and measured data are used for validation.The results show that compared with the round-trip undifferenced and round-trip single-difference methods,the proposed method has a simulated positioning accuracy improved by 0.282～0.363 m and 0.022～0.737 m and a measured positioning accuracy improved by 0.029 m and 0.012 m,respectively,which has a better positioning performance.关键词
水下定位/走航观测/双程声径/系统误差/双差模型Key words
underwater positioning/sailing observation/round-trip acoustic path/systematic error/double-dif-ference model分类
地质学引用本文复制引用
李兆瑞,王振杰,张世美,杜笑天,王兆喆..基于双程声径的海底控制点GNSS-A双差定位方法[J].石油地球物理勘探,2025,60(2):310-320,11.基金项目
本项研究受国家自然科学基金项目"顾及海面基准点位置误差的海底大地控制网联合平差研究"(42174020)、崂山实验室科技创新项目"水下通讯导航核心关键技术研究"(LSKJ202205101)联合资助. （42174020）
