Table 3 Processing strategies for PPP-RTK
Item | Model |
|---|---|
GNSS system | GPS, Galileo, and BDS |
Signal section | GPS: L1/L2; Galileo: E1/E5b; BDS: B1I/B2I |
Sampling rate | 1 s |
Elevation cut-off angle | 7° |
Weight for observations | The modified stochastic model proposed in this paper |
Phase wind-up effect | Corrected |
Ionospheric delay | Corrected by atmospheric corrections |
Tropospheric delay | The dry component was corrected by the Saastamoinen model; the wet component was corrected by atmospheric corrections |
Satellite and receiver antenna phase center | igs14.atx |
Station coordinate | Estimated in the epoch-wise kinematic model |
Phase ambiguity | Partial ambiguity resolution strategy proposed in this paper |
Atmospheric corrections | Generated by the server stations, the distance between the server stations and user stations is about 50–60 km |
Real-time or offline | Real-time |