Table 1 Data processing strategies of PRIDE PPP-AR
From: Assessing IGS GPS/Galileo/BDS-2/BDS-3 phase bias products with PRIDE PPP-AR
Items | Strategies |
|---|---|
Priori noise | Pseudorange: 0.3 m Carrier-phase: 0.006 cycles |
Cutoff elevation | 7° |
Weighting strategy | Weight = 1, if elevation > 30° Weight = 4 \({\text{sin}}\left( {{\text{elevation}}} \right)^{2}\), if elevation < 30° |
Antenna phase centers | igs14.atx/M14.atx/ESA BDS-2 estimations |
Tidal displacements | Corrected (Petit & Luzum, 2010) |
Relativistic effect | Corrected |
Receiver clocks | One for each GNSS as a white-noise like parameter |
Troposphere delays | Saastamoinen model (Saastamoinen, 1972) and estimated every hour using the Global Mapping Function (GMF) (Boehm et al., 2006) |
Horizontal troposphere gradients | Estimated every 12 h |
Ionosphere delays | First-order delays eliminated in the ionosphere-free combination and higher-order delays corrected with CODE global ionosphere maps (Fritsche et al., 2005) |
Sequential bias fixing | Applied to daily and kinematic PPP with 24 h of data (Dong & Bock, 1989) |
LAMBDA | Applied to hourly solutions with a ratio threshold of 3.0 (Teunissen, 1995) |