摘要
在GNSS高精度定位中,观测量定权方式的选择影响着定位的性能,特别是对于实时精密单点定位,由于各个卫星实时轨道及钟差改正数的精度不同,PPP的定位解算性能会受到不同的影响。据此采用融合SISRE的方式将不同卫星轨道及钟差精度信息加入到卫星高度角定权模型中,通过对56个测站单天观测数据进行仿实时PPP实验可以发现,融合SISRE的定权模型在平均情况下可以减少收敛时间约0.91%,个别测站的收敛时间可以减小5 min以上,且可获得静态cm级甚至是mm级定位精度。
In GNSS high-precision positioning,the selection of observations weight method affects the positioning performance.Especially for the real-time precise point positioning,the PPP performance will be affected by the different accuracy of the real-time orbit and clock corrections of each satellite.According to this,the information of different satellite orbits and clock accuracies is added to the satellite elevation-depending weight model by using SISRE.Through the pseudo real-time PPP experiment on the single day observation data from 56 stations,it can be found that the SISRE-combined weighting model can reduce the positioning convergence time by 0.91%on average.For individual stations,the convergence time can be reduced by more than 5 min.The positioning accuracy is about cm level or even mm level in static mode.
作者
刘亚
何文涛
张洁
LIU Ya;HE Wentao;ZHANG Jie(Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China;University of Chinese Academy of Sciences, Beijing 100049, China;Hangzhou Zhongke Microelectronics Co. Ltd, Hangzhou 310053, China)
出处
《测绘科学技术学报》
CSCD
北大核心
2021年第3期235-239,共5页
Journal of Geomatics Science and Technology
基金
中国第二代卫星导航系统重大专项(GFZX030302020205)。
