Two-way time transfer experiment via the Horizon satellite

Two-way time transfer via satellite is one of the most precise methods of time synchronization. This method makes it possible to obtain 0,1 nanosecond precision and decrease systematic error to the nanosecond level. The two-way time transfer system designed in Russia and the results of experiments are described. The experiments consist of two-way time transfer via satellite, ground station delay measurements and a relativity effect calculation. The results of two-way time transfer are compared with GLONASS data.