Table 3 Parameter strategies for three techniques
From: GNSS techniques for real-time monitoring of landslides: a review
Parameter items | Strategies | ||
|---|---|---|---|
RTK | PPP | PPP-RTK | |
Observations model | DD | IF | UDUC |
Frequency | GPS dual-frequency | ||
Observation weighting | 0.3 m and 0.003 m for code and phase | ||
Sampling rate | 30 s | ||
Cutoff angle | 15° | ||
Orbits and clocks | Broadcast ephemeris | Real-time products from CNES | |
Zenith wet tropospheric delay | No | Estimated | Atmospheric products |
Ionospheric delay | No | Estimated | Atmospheric products |
Satellite hardware delay | DD | AR products | AR products |