Abstract：JASON\|2, which was launched on June 20, 2008, has been in operation for more than 5 years. As the processor of T/P and JASON\|1 satellite, the radial accuracy of the JASON\|2 orbit must be better than 1.5 cm, in order to continue the altimeter observations of T/P and JASON\|1 satellite. In this work, the antenna phase center variation of JASON\|2, based on residuals of GPS ionosphere\|free observations from January 1, 2012 to December 31, 2012, is modeled. The accuracy of the precise orbit of JASON\|2 achieved with the reduced dynamic method is assessed by comparison with the precise orbit ephemeris (POE) from JPL, orbit overlaps, and post\|fit residuals. Results show that strategies used by this paper can improve orbit accuracy and that the orbits achieved are stable and reliable. The 3D RMS of JASON\|2 orbit difference is about 2.5 cm and the RMS of radial direction of JASON\|2 reaches 1.0 cm.
MA Yang,OU Jikun,YUAN Yunbin. Antenna Phase Center Variation Estimation of JASON\|2 and Its Precise Orbit
Determination towards 1 cm[J]. jgg, 2015, 35(2): 186-189.
