摘要
差分GPS水下立体定位系统是通过测量同一水声信号到达不同浮标的时刻,计算水下收发机到各枚浮标的距离差,实现水下立体双曲线交会定位的。本文对水下立体定位导航系统的数学模型进行了推导。根据差分GPS水下立体定位导航系统的要求对GPS接收机时钟同步进行了详细分析,同时对GPS接收机接口数据输出和支持的三种时间测量方案进行了介绍,并对时间延迟进行了分析。
Under-water GPS positioning system uses distance difference between two ranges from target to GPS-buoys to resolve the target's position.The distance difference is calculated from time difference of the same signal arriving to the two buoys,therefore,time measuring is the key problem of Under-water GPS positioning system.In this paper,the positioning algorithm is developed and GPS time system is introduced.At the same time,the synchrony accuracy of GPS receivers is validated.Furthermore,three types of time measuring and delay time are shown in detail.
出处
《测绘科学》
CSCD
北大核心
2006年第2期25-26,共2页
Science of Surveying and Mapping
基金
国家863项目(2001AA613050)"水下GPS立体定位导航系统研制"
