Real-Time Precise Point Positioning during Outages of the PPP-B2b Service

The precise point positioning service on B2b signal (PPP-B2b) is a real-time decimeter-level provided by the BeiDou-3 Global Navigation Satellite System (BDS-3). provides users with high-precision orbit and clock corrections through geostationary (GEO) satellites, which means that PPP-B2b would be unusable if GEO satellites were blocked. In this study, performance of results during outages are comprehensively investigated. showed PPP can achieve satisfactory accuracy extending nominal validity received corrections. After for 10 min, BDS-3 medium earth (MEO) mean root-mean-square error (RMSE) values extended 0.16 m, 0.26 0.23 m in radial, along-, cross-track directions, respectively. inclined (IGSO) was slightly worse than MEO satellites; Positioning (GPS) RMSE 0.11 0.45 0.33 terms clock, standard deviation (STD) reached 0.17 ns, 0.20 0.22 ns after min MEO, IGSO, GPS maintained outage evaluated based five stations around China. Our experiments that, as long interruption time does not exceed comparable obtained following correction.