Research on BD Nanosecond One-Way Timing Method
Different from other GNSS navigation systems, the constellation of BD navigation system consists of GEO, MEO, and IGSO satellites which is the characteristic of BD. The altitude of GEO orbit is higher than that of MEO. Therefore, the ephemeris and ionosphere delay errors are more dependent in the paths from GEO satellites to two users involved in time comparison. Therefore, the results of common view time transfer based on GEO satellites are better than that of MEO. A method of changing the generation of UTC time parameters is proposed which makes full use of the advantages of GEO satellites in time transfer. The time difference between system time of navigation system and UTC(K) is monitored by user terminal which referenced with a ultrastable frequency signal. The UTC time parameters are generated based on these time differences. Users with the new UTC time parameters not only can get the time difference between their local time and UTC(K), but also can farther eliminate the errors in one-way timing method. Without aggravating the burden of users, the precision of this method is equivalent to that of common view time transfer which is superior to the existed GPS and BD one-way timing method.
KeywordsBDS Common view time transfer One-way UTC time parameters
Funded by the West Ph.D Program of West Light, CAS (2013BS24), National Natural Foundation (11503030) and the State Key Laboratory of Geo-information Engineering, No. SKLGIE2014-M-2-5.
- 1.BeiDou Navigation Satellite System Signal in Space Interface Control Document (2012) Open service signal B1I (Version 1.0). China Satellite Navigation Office, December 2012Google Scholar
- 2.Gifford A, McNeff J, Pace S (2001) One-way GPS time transfer 2000. In: Proceedings of the 32nd annual precise and time interval (PTTI) applications and planning meeting, 28–30 November 2000, Reston, Virginia, USA, pp 137–146Google Scholar
- 4.Lombardi MA, Novick AN Comparison of the one-way and common-view GPS measurement techniques using a known frequency offset. In: Proceedings of the 34th annual precise and time interval (PTTI) application and planning meeting, 3–5 December 2002, Reston, Virginia, USA, pp 39–51Google Scholar
- 5.Allan D, Weiss MM (1980) Accurate time and frequency transfer during common-view of a GPS satellite. In: Proceedings Frequency Symposium, pp 334–346Google Scholar
- 6.Parker TE, Matsakis D (2004) Time and frequency dissemination advances in GPS transfer techniques. GPS World 11:32–38Google Scholar
- 7.Lombardi MA, Nelson LM (2001) Time and frequency measurements using the global positioning system. Cal Lab: Int J Metrol 8:26–33Google Scholar
- 8.Xu L X, Li X H, Xue Y R et al (2012) Study of a new one-way timing method. Sci China G: Phys Mech Astron 55(12):2476–2481Google Scholar
- 9.Zhang H, Ping J, Zhu W, Huang C (2006) Brief review of the ionospheric delay models, Progr Astron 24(1):16–26Google Scholar
- 10.Feng W, Chen X, Wu Xing, Ye X (2011) Influence of space latitude on differential ionospheric grid system. J Geod Geodyn 31(4):135–138Google Scholar
- 11.Yuan Y, Ou J (2003) Results and analysis on determining global TEC with the GPS data provided by IGS. Prog Nat Sci 13(8):885–888Google Scholar