Two-way Satellite Time and Frequency Transfer

Applications

• Synchronization of one station clock to a remote Master station clock at nanosecond accuracy via a satellite link
• Comparison of a station clock reference to a remote station Clock reference for time keeping purpose

Technology

Two-way Satellite Time and Frequency Transfer (TWSTFT) is a GNSS independent technique of synchronizing multiple station clocks, irrespective of their geographic location, to a remote Master station reference clock via a dedicated satellite link.

Accord's NGS-T20, a TWTFT modem is capable of synchronizing a slave station clock to an accuracy of less than 5 ns with respect to the Master's reference clock. Moreover, in the absence of the satellite link, once synchronized, the Modem can keep the time accurate to less than one microsecond over the next 24 hours.