High precision over-the-horizon time transfer by a 40.5km tropospheric link

High precision time synchronization is of vital importance for the distributed system's normal operation. One way troposphere time transfer (OWT
³
) is one of implemented means to achieve high precision over-the-horizon time synchronization. In this paper, we put forth OWT
³
to achieve the system's time synchronization and operated an outfield experiment. Firstly, the construction of OWT
³
has been established. Then we studied troposcatter channel's influences on OWT
³
theoretically. Besides, an outfield experiment was carried out over a 40.5km tropospheric link between Xi'an and Sanyuan. From the experiment, we could conclude that OWT
³
is a feasible time synchronization means for distributed system. Normal demodulation condition of OWT
³
is that the signal power after down-conversion is 20 dBm around. And troposcatter channel's influences on OWT
³
system are about 37.0 + 25.8 ns during 5000 samples (about 1.38h) roughly.