大地测量与地球动力学2024，Vol.44Issue(8)：810-814,5.DOI:10.14075/j.jgg.2023.11.135
基于参数搜索的水声定位时标跳变改正方法
Correction Method for Time Stamp Jumps in Acoustic Positioning Based on Parameter Search
摘要
Abstract
Acoustic positioning technology can transfer the position reference frame maintained by GNSS into the ocean.Domestic GNSS-acoustic seabed positioning experiments typically involve the cooperation of multiple hardware devices.However,the observation data outputted by different de-vices may suffer from time stamp jumps.While time stamp jumps can be resolved through redundant observations,there is currently no effective solution for cases without redundant observations.There-fore,we propose a time stamp jump correction method based on parameter search.By constructing a search space for time stamp deviations and using the unit weight variance of acoustic positioning results as a criterion,the time stamp jump in observation data is searched numerically.The proposed method is validated using measured sea trial data.The results show that the parameter search method successfully detects a time stamp jump of approximately 1 second in acoustic device data and improves the accuracy of acoustic positioning from decimeter-level to millimeter-level by correcting the data time stamps.关键词
水声定位/GNSS/时标跳变/冗余观测/参数搜索Key words
acoustic positioning/GNSS/time stamp jump/redundant observation/parameter search分类
天文与地球科学引用本文复制引用
张济勇,刘冬晖,陈冠旭,冯义楷..基于参数搜索的水声定位时标跳变改正方法[J].大地测量与地球动力学,2024,44(8):810-814,5.基金项目
国家电网公司总部科技项目(5108-202218280A-2-325-XG). Science and Technology Project of the State Grid Corporation of China,No.5108-202218280A-2-325-XG. （5108-202218280A-2-325-XG）
