Precise point positioning with ambiguity resolution (PPP-AR) provides globally available centimeter-level positioning, but its convergence time remains a limiting factor for time-critical applications. One important contributor to slow convergence is short-term mismodeling of the zenith wet delay (ZWD), which affects the float ambiguity estimates and delays integer fixing. Numerical weather models (NWMs) offer physically reali...

Global Navigation Satellite Systems (GNSS) Real-time Precise Point Positioning (RT-PPP) strongly relies on the precise satellite orbits and clocks, especially the latter requires high update rate, e.g., five seconds, due to its limited prediction accuracy. Such a high-rate update frequency is a burden to both the data analysis and communicating, and interruption in communicating is almost unavoidable. For the new constellation...