Acta Geodaetica et Cartographica Sinica ›› 2021, Vol. 50 ›› Issue (4): 427-435.doi: 10.11947/j.AGCS.2021.20200549

• BeiDou Navigation Satellite System •     Next Articles

BDS-3 performance assessment:PNT, SBAS, PPP, SMC and SAR

CAI Hongliang1, MENG Yinan1, GENG Changjiang2, GAO Weiguang1, ZHANG Tianqiao3, LI Gang1, SHAO Bo4, XIN Jie3, LU Hongyang5, MAO Yue6, YUAN Haibo7, LIU Cheng1, HU Xiaogong8, LOU Yidong9   

  1. 1. Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China;
    2. Test and Assessment Research Center of China Satellite Navigation Office, Beijing 100094, China;
    3. Beijing Satellite Navigation Center, Beijing 100094, China;
    4. The 20th Research Institute of CETC, Xi'an 710068, China;
    5. China Transport Telecommunications and Information Center, Beijing 100011, China;
    6. Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China;
    7. National Timing Service Center, China Academy of Science, Xi'an 710600, China;
    8. Shanghai Astronomical Observatory, China Academy of Science, Shanghai 200030, China;
    9. GNSS Research Center of Wuhan University, Wuhan 430079, China
  • Received:2020-11-12 Revised:2021-02-19 Published:2021-04-28

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Abstract: With algorithm and methods provided, performance of BDS-3 services including PNT (positioning, navigation and timing), SBAS (satellite-based augmentation system), PPP (precise point positioning), SMC (short message communication) and SAR (search and rescue) is evaluated using different measurement data. Results show that signal in space(SIS) accuracy is 0.23 m(RMS), SIS availability is 99.44%, SIS continuity is 99.99%, PDOP availability is 100%, positioning accuracy is 1.3 m in horizontal and 2.09 m in vertical direction, positioning availability is 99.93% and timing accuracy is 14.7 ns(95%) for PNT service. For SBAS, positioning accuracy in horizontal direction is 1.03 m and in vertical direction is 2.60 m (95%), APV-I availability is 100%. For PPP service, positioning accuracy is 0.17 m(95%) in horizontal direction and 0.22 m(95%) in vertical direction, the average convergence time is 9 min. For regional short message communication, the communication success rate is 99.6%, the communication capacity is 15.3 million times per hour(uplink), 9.35 million times per hour(downlink); while for global short message communication, communication success rate is 96.46%, communication capacity is 0.4 million times per hour (uplink), 0.21 million times per hour (downlink). For search and rescue service, the receiving success rate is 98.3%(with sending power 37 dBm).

Key words: BDS-3, PNT, SBAS, PPP,SMC, SAR, performance

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