摘要
导航信号发射时刻准确性是影响卫星导航系统定位授时性能的关键指标。转发式卫星导航试验验证平台是我国具有自主知识产权的一种新卫星导航体制,基于卫星转发地面产生导航信号的工作模式实现卫星导航功能。相对通用卫星导航系统,该平台导航信号的传播路径多了从地面到卫星的上行传播路径,实现导航信号准确播发,成为系统的难点。文章给出了对导航信号上行传播路径时延的补偿方法,采用时刻比对法对导航信号发射时刻准确性进行测量。测量结果表明,转发式卫星导航系统信号发射时刻准确性达到0.4ns。
The accuracy of the navigation signal transmission time is a key indicator affecting the positioning and timing performance of the satellite navigation system. The forward-based satellite navigation test verification platform is a new satellite navigation system with independent intellectual property rights in China. It implements satellite navigation function based on the working mode of satellite-based ground-based navigation signals. Compared with the general satellite navigation system,the propagation path of the platform navigation signal has more uplink propagation paths from the ground to the satellite,and the navigation signal is accurately broadcasted,which becomes a difficult point of the system. In this paper,the compensation method for the delay of the uplink propagation path of navigation signals is given. The accuracy of the navigation signal transmission time is measured by the time comparison method. The measurement results show that the accuracy of the signal transmission time of the transponder satellite navigation system reaches 0.4 ns.
作者
崔群超
荆文芳
CUI Qun-chao;JING Wen-fang(National Time Service Center,Chinese Academy of Sciences,Xi’an 710600,China;University of Chinese Academy of Sciences,Beijing 100049,China)
出处
《电子设计工程》
2019年第18期125-128,137,共5页
Electronic Design Engineering
基金
国家重大专项(Y913ZX1701)
关键词
高精度授时
发射时刻
准确性
测量
high precision timing
launch time
accuracy
measurement
