摘要
在卫星导航试验系统中,地面站设备时延的精确标定不但对地面站导航信号发射时间调整精度有着必然影响,而且也直接影响着卫星导航试验系统的定位、授时和导航性能与精度,但很难对单个设备时延进行直接的时延测量。文中阐述了卫星导航试验系统地面站设备时延的定义,给出了采用基于设备测量、事先标定和计算相结合地面站设备时延的测量方法。基于该方法进行了地面站设备时延有效性验证实验和不确定度分析,实验结果证明了该方法的有效性,并得出了一天的不确定度为0.2 ns。
In Open Test Platform for Bei Dou/GNSS(BOPT)system,the accurate calibration of the ground station equipment delay not only has a certain impact on the accuracy of the ground station navigation signal transmission time adjustment,but also directly affects the positioning,timing and navigation performance and accuracy of the satellite navigation test system.But it is difficult to directly measure the delay of a single device.This paper first introduces the definition of ground station equipment delay of BOPT system.Secondly,this paper presents a method of measuring equipment delay of ground station by means of equipment measurement,pre-calibration and calculation.Based on this method,the validity verification experiment and uncertainty analysis of ground station equipment delay are carried out.The experimental results show that the validity of this method and the uncertainty of a day are 0.2 ns.
作者
苏瑜
荆文芳
宋静
SU Yu;JING Wenfang;SONG Jing(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》
2021年第23期112-117,共6页
Electronic Design Engineering
