Table 1 PPP processing strategies
From: Augment BeiDou real-time precise point positioning using ECMWF data
Standard PPP | ECMWF-A PPP | ECMWF-P PPP | |
|---|---|---|---|
Sampling rate(s) | 30 | ||
Cutting-off angles | 10° | ||
Observations | Ionosphere-free combinations | ||
Antenna | igs08.atx | ||
Estimator | Forward-only Kalman filter | ||
Ambiguity | Float | ||
Troposphere ZHD | Niell model | ||
Troposphere ZWD | Estimation of ZWD [random walk process 10 mm/sqrt(h)] | ECMWF analysis data and estimation of residual ZWD [random walk process 10 mm/sqrt(h)] | ECMWF prediction data and estimation of residual ZWD [random walk process 10 mm/sqrt(h)] |
Troposphere mapping function | Niell mapping function | ||
Multi-GNSS satellite clock and orbit | MGEX clock and orbit from GFZ (Deng et al. 2016) | ||