The Precise Timing Facility is a ground station that generates the Galileo System Time, or GST. The GST is uploaded to the Galileo satellites to make the user localization possible, and it is also disseminated to every user as an accurate time reference. The Precise Timing Facility hosts several Cesium clocks and an Hydrogen Maser clock.
Together with the INRIM unit, Politecnico di Torino is developing the signal processing algorithm that generates the Galileo System Time from the atomic clocks in the PTF station. The final product is a Matlab prototype of the GST algorithm that will be coded into the Galileo system.