| Software used |
GAMIT v. 10.71 |
| Observations |
Nonredundant double differences, linear combination, pseudo-range used only to determine clock corrections and solve MW-WL ambiguity; cutoff mask: 3 degrees; data sampling rate: 30 seconds for data cleaning, 2 minutes in LSA analysis; receiver noise: codes C1 and P2' corrected to P1 and P2 based on monthly values developed by CODE. |
| Orbits |
CODE RAPID lub IGS RAPID (zależnie od dostępności). |
| Satellite antenns |
IG14.atx. |
| Satellite clocks |
Estimated during data processing and cleaning, initial values are taken from on-board ephemeris generated by SOPAC, final clocks determined based on orbits and station coordinates. |
| Receiver antenass |
IGS type mean (IGS14.atx) and individual calibration at selected EPN (EPNC.atx) and ASG-EUPOS (ASGC.atx) stations. |
| Receiver clocks |
Estimated from pseudoranges. |
| Tropospherr |
ZTD values estimated in 1h interval, gradients (N-S and E-W) determined once a day. Tropospheric delay and mapping functions from VMF1 or GPT2 model (depending on availability). |
| Ionosphere |
1st order effects eliminated by using linear combination, 2nd and 3rd order effects modeled from global electron density maps (VTEC) and IGRF2012 geomagnetic field model. |
| Tidal displacements |
Solid Earth tides: IERS 2003; zero frequency effect included in tidal model (not in station displacements); pole tide: IERS 2010, mean pole removed by linear trend; ocean tidal effect: IERS 2010, displacements based on amplitude and phase of 11 major tidal waves interpolated for each station from FES2004 model. |
| Earth orientation parameters |
IERS Bulletin A (based on USNO), diurnal and semi-diurnal variations in pole motion (X,Y) and UT1 time due to ocean tides included according to IERS 2010; precession according to IAU1976 model, nutation - IAU2000. |
| Reference frame |
ITRF2014 defined by 41 EPN stations with transformation to ETRF2000. |
