Time dissemination services: The experimental results of the European H2020 DEMETRA project

Tavella, P.; Sesia, I.; Cerretto, Giancarlo; Signorile, G.; Calonico, Davide; Costa, R.; Clivati, Cecilia; Cantoni, E.; Stefano, C. De; Frittelli, M.; Formichella, Valerio; Widomski, T.; Kaczmarek, Jan; Użycki, J.; Borgulski, K.; Olbrysz, P.; Kowalski, Jerzy K.; Cerabolini, P.; Biserni, E.; Leone, Velia M.; Zarroli, E.; Sormani, D.; Cernigliaro, A.; Fiasca, F.; Perucca, A.; Mantero, S.; Defraigne, Pascale; Özdemir, Nülifer; Baire, Q.; Dhiri, V.; Veiga, M.T.; Suarez, T.; Díaz, Javier; Gandara, M.; Hamoniaux, V.; Mangiantini, M.; Wallin, Anders; Varriale, E.; Morante, Q.; Galleani, Lorenzo

doi:10.1109/fcs.2016.7563585

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…While working on the implementation of WR-PTP for the entire 1830 km of lift, we have tested WR-PTP time transfer over the test-bed from Turin to Modane, within the project H2020 Demetra [19]. The successful test has pushed us to offer WR-PTP as a service for industrial users.…”

Section: Results Overview: Industrial Casesmentioning

confidence: 99%

Time and Frequency Distribution over fibre for Geodesy, Seismology and Industry

Calonico

Clivati

Mura

et al. 2018

2018 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)

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Section: Results Overview: Industrial Casesmentioning

confidence: 99%

Time and Frequency Distribution over fibre for Geodesy, Seismology and Industry

Calonico

Clivati

Mura

et al. 2018

2018 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS)

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“…The other two algorithms, based on an ensemble of 6 commercial Cs clocks and on UTCr (preferred to UTC, in this case), have similar performance, worse than those of the fountain steering algorithm. Anyway, both algorithms have advantages with respect to the cesium fountain algorithm, for example in terms of robustness and cost, two fundamental aspects for timing users in many industrial applications, such as 5G telecommunications, energy, finance, and GNSS [15]. Moreover, note that the metrics we used to quantify the performance of the algorithms not only depend on the quality of such algorithms, but also on the quality of the steered clock within the considered period, so that better results can be achieved with a better clock.…”

Section: Steering Algorithms Comparisonmentioning

confidence: 99%

Generating a real-time time scale making full use of the available frequency standards

Galleani

Signorile²,

Formichella³

et al. 2020

Metrologia

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We propose a time-scale algorithm for the automated generation of a real-time time scale, making full use of the frequency standards available in a typical time laboratory. The time-scale algorithm is made by a pre-processing stage, a steering algorithm, and a post-processing stage. In particular, in this work we propose a set of three different steering algorithms, running in parallel and eventually producing a unique steering correction to be applied to a master clock. Each algorithm is based on a different steering reference, namely, a primary frequency standard, an ensemble clock, and the Coordinated Universal Time (UTC), or its rapid version, UTCr. Preand post-processing stages help to provide robustness and to cope with data gaps. The proposed algorithms have been extensively and successfully tested offline, on real data from the time laboratory of the Italian National Institute of Metrological Research (INRiM), where an online test has also been performed in the period May-October 2019. Then, since the middle of January 2020, the time-scale algorithm has been applied for the generation of the Italian legal time scale, UTC(IT). We show here the results of the offline tests and of the 5-month online test. The proposed strategy can be used wherever a stable, accurate, and robust time reference is needed, e.g. for a local realization of UTC in a laboratory k, UTC(k), or for generating the reference time of a global navigation satellite system (GNSS).

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“…The DEMETRA nine time services are described in [1][2] [22], in this section a table summarizing the features and the achieved performances of each service are reported.…”

Section: Demetra Summary Performancesmentioning

confidence: 99%

Demonstrator of Time Services based on European GNSS Signals: The H2020 DEMETRA Project

Defraigne

Tavella

Sesia

et al. 2017

The Precise Time and Time Interval Systems and Applications Meeting

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During 2015-2016, a European Consortium of 15 partners from 8 different countries, developed the DEMETRA (DEMonstrator of EGNSS services based on Time Reference Architecture), a project funded by the European Union in the frame of the Horizon 2020 program. This project aims at developing and experimenting time dissemination services dedicated to specific users like traffic control, energy distribution, finance, telecommunication, and scientific institutions. Nine services have been developed. These services provide time dissemination with accuracy levels from millisecond to the sub-ns, and also additional services like certification, calibration, or integrity. Five of these services are based on the European GNSS. After a development phase (see PTTI 2016 presentation) the full DEMETRA system has been working during six months for demonstration. The paper will report about the experimentation results, showing performances and limits of the proposed time dissemination services, aiming to foster the exploitation of the European GNSS for timing applications.

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Time dissemination services: The experimental results of the European H2020 DEMETRA project

Cited by 7 publications

References 9 publications

Time and Frequency Distribution over fibre for Geodesy, Seismology and Industry

Time and Frequency Distribution over fibre for Geodesy, Seismology and Industry

Generating a real-time time scale making full use of the available frequency standards

Demonstrator of Time Services based on European GNSS Signals: The H2020 DEMETRA Project

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