Table 2 Main specifications of the GNSS analysis
Classification | Specification | Remarks |
|---|---|---|
Software | RNX2RTKP (RTKLIB ver. 2.4.2, patch 12) | |
Analysis procedure | Precise point positioning | |
Kinematic (Shipborne GNSS) | ||
Static (GEONET station) | ||
Integer ambiguity | Not fixed (no PPP-AR applied) | |
Ephemeris | MADOCA real-time product (MDC2) | |
Mapping function | GMF (no gradient estimation) | Boehm et al. (2006) |
Elevation cutoff angle | 3° | |
Antenna phase center variation | IGS08_1793.atx MAST (DECKt): “TRM55970. 00 NONE” DECK: “JAV_GRANT-G3T NONE” | |
Geoid model | EGM2008-SE (1″) (Und min1 × 1 egm2008 is w = 82 WGS84 TideFree_SE) | http://earth-info.nga.mil/GandG/wgs84/gravitymod/egm2008/egm08_wgs84.html |
Tidal effect | Solid earth tide: IERS Conventions 2010 Ocean Tidal Loading: Not applied | Petit and Luzum (2010) IERS Technical Note No.36, IERS Conventions (2010) |
Ionosphere correction | Ionosphere-free linear combination | |
ZHD | \( \begin{aligned}& {\text{ZHD}} = 0.002277 \times P \hfill \\ & P \, = 1013.25 \times (1 \, - \, 2.2557 \times \, 10 -^{5} /h)^{5.2568} \hfill \\ \end{aligned} \) P: atmospheric pressure (hPa), h: geodetic height above mean sea level | Elgered et al. (1991) |
Time-dependent parameters | Antenna coordinate | Updated every 1 s |
Receiver clock | ||
ZWD random-walk variable with process noise of 0.1 mm/s1/2 |