ZESPÓŁ DS. GALILEO WARSZAWA, Galileo FOC Timing Interface Working Group – opis mechanizmu przyjmowania nowych członków Jerzy Nawrocki Centrum Badań Kosmicznych, Obserwatorium Astrogeodynamiczne, Polska Akademia Nauk, Borowiec Waowice,

Control Segment of Galileo Satellite Navigation System Galileo Time Service Provider, responsible for computation of Galileo System Galileo Time Service Provider, responsible for computation of Galileo System Precise Time Facility (PTF) – physical realization of Galileo System Time Two PTF stations (Fucino (Alenia-Spazio),Pfafenhofen, DLR) Running in parallel (Master and Slave )

(*)FOC –Full Operational Capability Galileo FOC* Timing Interface Working Group: White Paper White Paper Document intended as a technical input for EC/ESA in support of the procurement of the Galileo Time Service Provider for the Galileo IOC phase. The GTSP is one of the Galileo external service facilities required to achieve the Galileo Initial Operational Capability (IOC) and to provide Galileo early services. Discussion on all organizational and technical aspects of Galileo Time Service Provider

Aktualna sytuacja: Prototype of Galileo Time Service Provider, located at CNES is still Prototype of Galileo Time Service Provider, located at CNES is still working (weighted average of indications of atomic clocks_ The working Group recommended realization of Galileo System Time The working Group recommended realization of Galileo System Time Based on UTC time realized by European laboratories, so called UTC(k) Final location of GTSP decided, candidates (INRIM, PTF’s, ESA) Final location of GTSP decided, candidates (INRIM, PTF’s, ESA)

Realizacja czasu Galileo

Time Validation Facility (TVF) Involvement in the TVF of national timing Involvement in the TVF of national timing laboratories participating in the definition of the UTC (e.g. INRIM, PTB, NPL, OP, ROA) The TVF should be deployed at and operated by an The TVF should be deployed at and operated by an European UTC Timing Laboratory.

Realizacja czasu Galileo FOC, the above TGVF The Galileo metrological time keeping function is essential for provision of the UTC dissemination through Galileo SIS as requested by MRD. This function is allocated to the TVF. TVF tasks are: -Operating the daily time transfer links to UTC(k) laboratories -required for the prediction of UTC, the periodic calibration of the equipment; - Continuously predicting UTC; -Providing Galileo with the daily predicted value of UTC-GST time and -frequency offset and the UTC-GST daily steering (modulo 1 second) -correction; -Interfacing with the BIPM by receiving from BIPM the -Circular T (UTC-UTC(k)(historical)); -Interfacing IERS/BIPM by receiving from it information on -TAI-UTC offset (leap second);

Core UTC(k) laboratories Core UTC(k) laboratories (INRIM, PTB, NPL, OP, ROA) Associated UTC(k) laboratories Associated UTC(k) laboratories(………………………………)

Galileo Full Operational Capability. Timing and Geodetic Validation Facility Spotkanie z Thales-Alenia

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