From: Real-time GNSS precise point positioning with smartphones for vehicle navigation
Items | Strategies/settings |
---|---|
Raw measurements | Code pseudoranges, carrier-phase, Doppler, C/N0, ADR State, and other related information in Android GNSS API |
Code smoothing | Smoothed by Doppler |
Elevation cutoff | 10° |
C/N0 mask | 20 dB·Hz |
Stochastic model | C/N0-dependent |
Precise orbits and clocks | Derived from broadcast ephemeris and real-time SSR corrections |
Ionospheric delay | Estimated for each satellite by adding virtual ionospheric measurements derived from the real-time SSR VTEC product using the ionosphere-weighted PPP model |
Tropospheric delay | Estimated zenith tropospheric delay with global mapping function for projection |
Phase ambiguities | Estimated as float values |
Receiver clock offsets | Separate receiver clock parameters for code and carrier phase are applied and estimated as white noise in the PPP filter |
User coordinates | Estimated as white noises in kinematic mode |