摘要
实时精密单点定位精度很大程度上取决于轨道及钟差精度,本文通过组合SSR改正数结合广播星历的方式为实时精密单点定位提供了高精度、稳定的卫星轨道及钟差.相较于单SSR改正源来说,卫星轨道及钟差改正数据缺失率分别下降0.39%和2.14%.最后通过对3测站7天观测数据进行精密单点定位分析,在静态定位模式下最快收敛时间在20 min以内,定位精度优于2 cm甚至是毫米级,动态模式下定位精度约为分米级。
The real-time precision point positioning depends largely on the accuracy of the satellite orbit and clock bias. This paper provide a high-precision, stable satellite orbit and clock bias for real-time precise point positioning by combined SSR corrections with broadcast ephemeris. Compared with the single SSR correction source, the missing rate of satellite orbit and clock corrections decreased by 0.39% and 2.14% respectively. Through the precise point positioning analysis of 7 days observation data with 3 IGS stations, the fastest convergence time is within 20 min and the positioning accuracy is better than 2 cm or even millimeter level in static positioning mode, the positioning accuracy in dynamic mode is decimeter level.
作者
刘亚
何文涛
LIU Ya;HE Wen-tao(Institute of Microelectronics of Chinese Academy of Science,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Hangzhou Zhongke Microelectronics Co.,Ltd,Hangzhou 310053,Zhejiang,China)
出处
《微电子学与计算机》
2021年第2期14-18,共5页
Microelectronics & Computer
基金
中国第二代卫星导航系统重大专项(GFZX030302020205)。
关键词
精密单点定位
实时
SSR改正数
轨道
钟差
缺失率
precise point positioning
real-time
SSR corrections
orbit
clock bias
missing rate
