ZESPÓŁ DS. GALILEO

WARSZAWA, 08. 02. 2013

Galileo FOC Timing Interface Working Group – opis mechanizmu

przyjmowania nowych członków

Jerzy Nawrocki

Centrum Badań Kosmicznych, Obserwatorium Astrogeodynamiczne, Polska Akademia Nauk, Borowiec

Control Segment of Galileo Satellite Navigation 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 PaperDocument 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 stillworking (weighted average of indications of atomic clocks_

• 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)

Realizacja czasu Galileo

Time Validation Facility (TVF)

• 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 European UTC Timing Laboratory.

Realizacja czasu Galileo

FOC, the above TGVFThe 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(INRIM, PTB, NPL, OP, ROA)

• Associated UTC(k) laboratories(………………………………)

Galileo Full Operational Capability. Timing and Geodetic Validation Facility

Spotkanie z Thales-Alenia

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