Technical Description of Solution SSC(EUREF)98P01 ================================================= T.A. Springer (1), D. Ineichen (1), C. Bruyninx (2) --------------------------------------------------- (1) Astronomical Institute, University of Berne. (2) Royal Observatory Belgium. 0 - Title: SSC(EUREF)98P01 1 - Technique: GPS 2 - Analysis Centre: EUREF 3 - Software used: BERNESE 4 - Data span: January 1995 - June 1998 5 - Celestial Reference Frame: - 6 - Terrestrial Reference Frame: a - Relativity scale: LET : local Earth in agreement with TAI or TT b - Velocity of light: Current value : 299 792 458 m/s c - Geogravitational constant: Current : GM0 = 3.986004415 * 10**14 m**3/s**2 d - Permanent tidal correction: Yes e - Definition of the origin: C10=0,C11=0,S11=0, f - Definition of the orientation: fixed EOP values and fixed IGS orbits g - Reference epoch: Middle of observation interval: 97:075 (March 16, 1997) h - Tectonic plate model: - i - Constraint for time evolution: Velocities of a chosen set of reference stations constraint to 0.1 mm/year. A priori model: ITRF96. Reference stations: REYK, ONSA, GRAZ, BOR1, ZWEN, MATE, VILL, KOSG, ZIMM, POTS, WTZR, THU1 7 - Earth Orientation: (modeled at the AAC level, software specific) a - A priori precession model: - b - A priori nutation model: - c - Short-period tidal variations in x, y, UT1: - 8 - Estimated parameters a - Celestial Frame: - b - Terrestrial Frame: X0, Y0, Z0, Xdot, Ydot, Zdot, c - Earth Orientation: - d - Others: In the GPS analysis of the EUREF AACs the following parameters are estimated: - wet zenith tropospheric delays - the phase ambiguities which were not resolved (normally 80 to 90% of the ambiguities are integer resolved) - station clock offsets (only for clock synchronization)