Precision Analysis of Beidou Satellites’ Broadcast Ephemeris
Abstract This paper discusses the scheme for analyzing the error of BDS broadcast ephemeris. By contrasting with IGS MGEX’s precise ephemeris and clock products, this paper presents statistics of orbit and clock error of broadcast ephemeris of all in-orbit BDS satellites for a period of 31 d. The results show that: 1)The RMS of radial orbit error of current BDS broadcast ephemeris is less than 1 m, tangential and normal RMS is less than 8 m for GEO satellites, and tangential and normal RMS is less than 4 m for IGSO and MEO satellites. 2)The RMS of BDS clock bias error has no relationship with orbit types and is less than 15 ns. 3)From the perspective of signal-in-space range error, the relationship of the overall accuracy of BDS satellites broadcast ephemeris and orbit type is not clear and the overall accuracy is less than 2 m.
Key words :
Beidou satellites
broadcast ephemeris
orbit type
precision analysis
Cite this article:
MENG Xiangguang,SUN Yueqiang,BAI Weihua et al. Precision Analysis of Beidou Satellites’ Broadcast Ephemeris[J]. jgg, 2016, 36(10): 870-873.
MENG Xiangguang,SUN Yueqiang,BAI Weihua et al. Precision Analysis of Beidou Satellites’ Broadcast Ephemeris[J]. jgg, 2016, 36(10): 870-873.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2016/V36/I10/870
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