摘要
导航卫星发播的导航电文信息是用户导航定位的空间基准和时间基准.本文主要讨论了北斗卫星导航系统发展现状,介绍了北斗卫星导航系统发播信号特征与信息内容以及北斗系统时空基准与GPS(Global Positioning System)差异,在此基础上,详细给出了北斗基本导航电文中的卫星钟差与TGD(Time Group Delay)参数、卫星星历参数、电离层延迟模型参数的定义与使用方法,并结合实际应用,给出了用户使用北斗导航电文时需要特别注意的一些问题.
The navigation messages broadcasted by the navigation satellites are the time and space benchmark for user navigation and positioning. The developing status of the COMPASS is discussed firstly in this paper. Then, the broadcast signal characteristics, information contents, and the differences of time and space benchmark between COMPASS and GPS are introduced. Afterward, the definition and method of the COMPASS basic navigation messages, including satellite clock offset parameters, TGD parameters, satellite ephemeris parameters, ionosphere delay model parameters, are given in details. At last, some special attention problems for using the COMPASS navigation messages are also provided with the practical application.
出处
《中国科学：物理学、力学、天文学》
CSCD
北大核心
2015年第7期57-63,共7页
Scientia Sinica Physica,Mechanica & Astronomica
基金
自然科学基金资助项目(批准号:41174027)
国家高技术研究发展计划(编号:2013AA122402)资助项目
