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European TWSTFT calibration campaign 2014 of UTC(k) laboratories in the frame of Galileo FOC TGVF
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2016 (English)In: Proceedings of the Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI, 2016, p. 243-257Conference paper, Published paper (Refereed)
Abstract [en]

During 2014 (June 5th to August 17th), a campaign intended for the calibration of the time transfer links at the nanosecond uncertainty level established via Two-Way Satellite Time and Frequency Transfer (TWSTFT) between the Galileo Precise Timing Facilities PTF1 and PTF2, and five UTC(k) laboratories associated to the Galileo Full Operational Capability Time and Geodetic Validation Facility (hereinafter referred to as UTC(k)labs) was performed across Europe. This calibration exercise was performed coinciding with the deployment and operations ("FOC") phase of the Galileo Program, according to the Time Validation Facility (TVF) Statement of Work, issued by the TVF industrial prime GMV, Tres Cantos, Spain. In their statements of work, all UTC(k) agreed to participate in the necessary calibration campaigns. The calibration involved a travelling TWSTFT station subcontracted to TimeTech, GmbH, Stuttgart, Germany. This paper presents part of the results, specifically those calibration results for links between these involved UTC(k) laboratories: INRIM, OP, PTB, ROA, SP. As a result of the visit of five UTC(k) laboratories (besides the two Galileo Control Centers, and the fixed station at TimeTech), after about 10000 km of distance travelled, and 600 hours of effective measurement, the calibration report includes the results of 10 time links using the site method. This paper also includes the calibration results for links between the laboratories previously mentioned and USNO (in total 4 links) using the triangle closure analysis method. For theses links new CALR values were provided, based on the triangles UTC(k)labs - PTB and PTB - USNO (calibration by means of the USNO portable X-band TWSTFT station, in June 2014), respectively. The final report of this calibration campaign has been used as an example (Annex I) of the 'TWSTFT Calibration Guidelines for the UTC Time Links (v3.0)' (available on BIPM website, open area of CCTF WG on TWSTFT). The TGVF contract is being carried out under a programme of and funded by the European Union, and managed by ESA. The views expressed herein can in no way be taken to reflect the official opinion of the European Union and/or ESA. © 2016 The Institute of Navigation, Inc.

Place, publisher, year, edition, pages
2016. p. 243-257
Keywords [en]
Calibration, Site method, Triangle closure analysis, TWSTFT, Uncertainty, Interplanetary spacecraft, Laboratories, Plant shutdowns, Platinum alloys, Time measurement, Uncertainty analysis, Full operational capabilities, Galileo programs, Statement of works, Two-way satellite time and frequency transfers
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-27675Scopus ID: 2-s2.0-84964947982OAI: oai:DiVA.org:ri-27675DiVA, id: diva2:1059169
Conference
47th Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2016, 25 January 2016 through 28 January 2016
Note

References: Rapport BIPM-2011/01, p. 25. , RD01: Directive for operational use and data handling in two-way satellite time and frequency transfer (TWSTFT) Bureau International des Poids et Mesures, Sèvres; (2010) ITU Radiocommunication Sector, Recommendation ITU-R TF.1153-3, , RD02 : The operational use of two-way satellite time and frequency transfer employing PN codes. Geneva, Switzerland; RD03: Time transfer with nanosecond accuracy for the realization of International Atomic Time (2008) Metrologia, 45, pp. 185-198; (2014) RD04: Calibration of the Link UTC(USNO) - UTC(PTB) by Means of the USNO Portable X-Band TWSTFT Station, , Report 06 X-band USNO-PTB. Version 2.0

Available from: 2016-12-22 Created: 2016-12-21 Last updated: 2016-12-22Bibliographically approved

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