Multi-channel GPS time transfer and its application to the Polish atomic time scale

Several Polish scientific and commercial institutions are equipped with caesium frequency standards, which can be used for the establishment of a national atomic time scale. The Polish atomic time scale will be computed from a weighted average of the readings of these clocks. All participating laboratories are equipped with a multi-channel GPS C/A code Time-Transfer unit. The structure of this unit is described in brief: the multi-channel method improves the stabilty of the time transfer compared with the single-channel method. The results of such comparisons are presented.