Time transfer using smoothed P3 code of GEO and IGSO Satellite

The Common-View time transfer is often adopted in time comparison between two Time Laboratories. With a GPS or Other Global Navigation Satellite System receiver, a few nanoseconds time transfer precision can be gotten. In traditional GPS common-view, single channel C/A code is used for computation. In order to overcome ionospheric delay error, double frequency observed data is used to improve the ionospheric delay computation. In this paper, the common-view time transfer method using Chinese navigation system Satellite GEO and IGSO is tested. The P3 code and carrier phase smoothed P3 code is adopted and tested in the computation. At the end of paper, the precision of this technique is analyzed. The results show that the smoothed P3 Code can reduce the code observation noise and get a better stability.