GNSS World of China

Volume 47 Issue 2
May  2022
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LIU Dongliang, CHENG Fang, SHEN Pengli, LI Yanhong, LI Xiaowan. Accuracy assessment of BDS-3 satellite signal-in-space[J]. GNSS World of China, 2022, 47(2): 114-125. doi: 10.12265/j.gnss.2021112201
Citation: LIU Dongliang, CHENG Fang, SHEN Pengli, LI Yanhong, LI Xiaowan. Accuracy assessment of BDS-3 satellite signal-in-space[J]. GNSS World of China, 2022, 47(2): 114-125. doi: 10.12265/j.gnss.2021112201
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Accuracy assessment of BDS-3 satellite signal-in-space

doi: 10.12265/j.gnss.2021112201
  • 1.

    National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China

  • 2.

    Key Laboratory of Precision Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China

  • 3.

    University of Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 2021-11-22
    Available Online: 2022-04-14
    Abstract
  • Aiming at the accuracy of the signal-in-space after BeiDou-3 (BDS-3) is officially opened, The paper selected one-year Global Navigation Satellite System (GNSS) mixed broadcast ephemeris data (from August 1st, 2020 to July 31st, 2021) and used the precision orbit and clock offset provided by the German Potsdam Geoscience Research Center (GFZ) and International Global Navigation Satellite System Service (IGS) data center of Wuhan as reference to evaluate the accuracy of the BDS-3 signal-in-space. The research showed the orbit accuracy of the BDS-3 is better than 0.100 m, 0.405 m, and 0.547 m in the radial, along-track, and cross-track respectively, and the clock error accuracy is better than 1.926 ns, and SISRE statistical accuracy only affected by the orbit error is 0.134 m, and signal-in-space range error (SISRE) statistical accuracy is 0.612 m. SISRE of the geostationary orbit (GEO) satellites is 1.137 m. Compared with the GEO satellites, and SISRE of the inclined geosynchronous orbit (IGSO) satellites and the medium earth orbit (MEO) satellites are reduced by 36.3% and 51.3% respectively.

     

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