摘要
随着卫星导航技术的发展,无人机等运动载体上的卫星导航设备一般可以接收多个星座的卫星导航信号。在进行多星座卫星导航混合定位处理时,需要评估混合星座卫星导航系统的定位精度指标。卫星导航的定位精度与等效测距误差、空间几何分布等因素有关,不同星座的接收机使用的时钟不同,也会引入相应的误差影响。本文根据卫星导航定位原理,分析了混合星座卫星导航系统的定位误差方差,推导了混合星座定位的精度评估方法。最后,本文还分析了在混合星座定位时,引入测距精度较差的星座系统后,对整个导航系统性能的影响。实验结果表明,本文分析的混合星座定位精度评估方法与实验结果相符合,为评估多星座导航系统信息融合后的定位性能提供了指导参考。
With the development of satellite navigation technology,satellite navigation devices such as unmanned aerial vehicles can receive multi-constellation satellite navigation signals.Positioning accuracy of hybrid constellation is needed to evaluate in the hybrid positioning process.The positioning precision of the satellite navigation is related to the equivalent ranging error and the space geometry distribution.Different receivers use different clocks,and the corresponding clock error will be introduced.According to the principle of satellite navigation,this paper analyzes the variance of the positioning error of the hybrid constellation satellite navigation system.Finally,this paper also analyzes the influence of the constellation system which has poor accuracy to the performance of the whole navigation system.The experimental results show that this method is consistent with the experimental results,and it provides guidance reference for the evaluation of the positioning performance of multi constellation navigation system information fusion.
作者
黄丙胜
刘壮华
韩松
龚晶
HUANG Bingsheng;LIU Zhuanghua;HAN Song;GONG Jing
出处
《现代导航》
2017年第6期401-406,共6页
Modern Navigation
关键词
多星座导航
混合定位
定位精度评估
Multi-Constellation Navigation
Hybrid Positioning
Positioning Accuracy Evaluation
