Implementing the Galileo Precise Timing Facility

The precise timing facility (PTF) is an element of the Galileo Mission Segment. It is being developed by the following partners Consorzio Torino Time (CTT): ThalesAleniaSpace Italia, responsible for Management / technical coordination and overall design, INRIM (former Istituto Elettrotecnico Nazionale Galileo Ferraris) and Politecnico di Torino for the GST Generation Algorithm, Sistemi Elettronici Per l´Automazione (SEPA) for the Electrical Design and AI&T, Alenia SIA for the implementation of the Control & Algo Software and the product assurance, ALTEC for project control and logistics .A cooperative is also in place with the Astrogeodynamic Observatory (AOS, Poland) for the implementation of the time transfer SW and with SpectraTime (CH) for the backup AHM steering algorithm and the development of the picostepper. The PTF is in charge to generate the Galileo System Time (MasterClock), the physical time scale of Galileo. Following the papers presented at EFTF since 2007 and PTTI 2007, this paper presents an overview of the PTF, its versioning plan, the current status of development, qualification and delivery.