Sequential Generation of Multi-GNSS Multi-Frequency PPP-RTK Products and Their Performance Using the EUREF Permanent GNSS Network

In the classic Precise Point Positioning (PPP) approach, observations of Global Navigation Satellite Systems (GNSS) are processed at network level to generate satellite clocks and positions. This information can be used enable accurate point positioning for a single GNSS receiver. PPP Real-Time Kinematic (PPP-RTK) phase biases considered as well, enabling ambiguity resolution user levels. this research, 30 s multi-frequency raw GPS, Galileo, BDS-2/3 levels in sequential Kalman filter. PPP-RTK products generated up five frequencies, is performed using flexible reparameterization comparable wide- narrow-laning, which has shown yield significantly improved epoch coordinate solution when available. Different assumptions regarding time stability receiver have been made compared. The availability precise dual-frequency assessed A ambiguity-fixed available three epochs or fewer 77% all cases with an average 24 visible satellites static kinematic receivers processed. When only considered, fixed seven 71% cases. fastest was found two six observations. Estimating reference clock did not lead improvement solution. findings indicate that potentially faster than often suggested, potential further more regional atmospheric corrections considered.