Dual-frequency time transfer unit for comparisons of the remote clocks using GLONASS and GPS signals

Dual-frequency Time Transfer Unit (TTU) using GLONASS and GPS signals developed at "Russian Institute of Radionavigation and Time" JSC (RIRT) is intended for determining the offset between local clocks and GLONASS-time and GPS-time with the purpose of subsequent determining the mutual time and frequency offset between remote clocks, as well as for generating time scale signals synchronized to Russian National Universal Time Coordinated UTC(SU). The results of tests showed that the accuracy characteristics of the new Time Transfer Unit are higher than the same characteristics of the previous TTU model developed at RIRT as well as of TTS-3 and TTS-4 receivers, mostly when operating by GLONASS signals.