Journal of Astronautics ›› 2017, Vol. 38 ›› Issue (4): 367-374.doi: 10.3873/j.issn.1000-1328.2017.04.006

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A New Method of Generating UTC Parameters for BeiDou Navigation Satellite System

LI Dan dan, XU Long xia, ZHU Feng, LI Xiao hui   

  1. 1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China;2. Key Laboratory of Precision Navigation and Timing Technology, National Time
    Service Center, Chinese Academy of Sciences, Xi’an 710600, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-09-23 Revised:2017-01-23 Online:2017-04-15 Published:2017-04-25

Abstract:

Considering existing UTC parameters generating method and the unique constellation of BeiDou navigation satellite system (BDS), a new method for generating UTC parameters is proposed. The time offsets between the system time and UTC(NTSC) corresponding to each BeiDou satellite are obtained through receiving the BeiDou satellite navigation signals in the laboratory which keeps UTC(NTSC). Then, the UTC parameters of the new method is calculated. The prediction strategy of the UTC parameters is studied, and the effect of the different lengths of the original data and the different model degrees on forecast accuracy are analyzed. Only by changing the way of generating the UTC parameters, users can obtain the offset between their local time and UTC(NTSC) with the accuracy of better than 5ns by one-way receiving navigation signals. The timing precision of BeiDou using the proposed method is improved from the level of several dozen nanoseconds to several nanoseconds which is beneficial to the application and popularization of BDS.

Key words: BDS, UTC parameters, Time offset, GEO, Timing precision

CLC Number: