Journal of Astronautics ›› 2020, Vol. 41 ›› Issue (5): 569-577.doi: 10.3873/j.issn.1000-1328.2020.05.007

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Analysis of Common View Time Comparison by BDS 3 Satellite#br#

WANG Wei xiong, DONG Shao wu, WU Wen jun, WANG Xiang, GUO Dong, GUANG Wei   

  1. 1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China; 2. Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi’an 710600, China; 3. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101048, China
  • Received:2019-05-14 Revised:2019-06-18 Online:2020-05-15 Published:2020-05-25

Abstract: In order to evaluate the current performance of common view (CV) time comparison via BDS-3 satellite, based on the national time reference system maintained by National Time Service Center, Chinese Academy of Sciences (NTSC) and Institute of Photonics and Electronics, Czech Academy of Sciences (TP), the Asia-Euro CV time comparison with baseline of about 7500 km was carried out by BDS-3 satellite. Firstly, the single-station BeiDou satellites visual number and satellite elevation are analyzed. Then, the noise reduction processing was carried out by the Vondrak filter used the method of the frequency response. Finally, the results of the comparison between the BDS-3 satellite and the BDS-2 satellite and GPS CV were compared. The results show that in the current stage of BeiDou global networking, although the BDS-3 satellite has fewer visible satellites than the BDS-2 satellite, the accuracy of the common view is 1.16 ns, which is about 19% higher than that of the BDS-2 satellite. The time and frequency stability within 10000 seconds are also better than BDS-2 satellite.

Key words: BDS-3 satellite, International time comparison, Vondrak filter

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