Investigating the latest contribution of BeiDou-3 FOC to GPS/GLONASS/Galileo PPP

In this study, the latest contribution of the BeiDou-3 FOC satellites to GPS/GLONASS/Galileo/BDS-2 combined static and kinematic precise point positioning (PPP) is investigated over a one-month period in 2021 considering the three different cut-off angles (7 degrees, 15 degrees, and 30 degrees). The results show that the contribution of BDS-3 to GPS/GLONASS/Galileo PPP is generally marginal for 7 degrees and 15 degrees cut-off angles. The largest BeiDou-3 contributions to static and kinematic positioning accuracy are found to be 9%, 6%, and 19% (for 3-h sessions with the 15 degrees cut-off angle) and 9%, 15%, and 8% (with the 30 degrees cut-off angle) for the north, east, and up components, respectively. The largest reductions in static and kinematic convergence time by adding BDS-3 to GPS/GLONASS/Galileo are found to be 13%, 10%, and 6% (for the 30 degrees cut-off angle) and 17%, 7%, and 6% (for the 30 degrees cut-off angle) for the north, east, and up components, respectively.