不同测站GNSS系统时差监测预报结果比较分析

Analysis of system time difference monitoring and forecasting based on different monitoring stations

兼容与互操作是卫星导航系统发展的趋势,而时间互操作是卫星导航系统兼容互操作重要基础之一。时间互操作技术主要涉及导航系统间时差监测技术与时差预报技术。四个全球卫星导航系统的时间系统设计和时间产生保持策略存在差异,系统时间之间存在一定偏差,此偏差需要监测,并以直接发播的方式或以预报模型参数形式定期播发给用户。本文利用单站导航系统时差监测方法,基于中科院国家授时中心、德国联邦物理技术研究院和比利时皇家天文台的时差监测数据,开展了导航系统时差监测与预报技术研究,对比分析了其监测结果与预报结果。

Interoperability and compatibility is a tendency of Global Navigation Satellite System(GNSS).Time interoperability is one of an important fundamental study of GNSS compatibility and interoperability.Time interoperability technology mainly refers to time offset monitor and time offset prediction technology.Due to the difference of the time system design and time keeping strategies for four GNSSs,the system time exists offset between different GNSS.The system time offset should be monitored,predicted,and broadcasted to users in the form of prediction model parameters or predicted data termly.In this paper,we have conducted a study on the monitoring and predicting technology of navigation system time deviation.The monitoring data come from three data sources by single station monitoring method,which are Time Keeping Laboratories of the National Time Service Center,Physikalisch Technische Bundesanstalt of German,and Observatoire Royal de Belgique.We carried out research on the technology of monitoring and predicting system time offset,comparing and analyzing the monitoring data and the predicting data.