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Time and frequency laboratory activities at RISE
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.ORCID iD: 0000-0003-1710-6058
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.ORCID iD: 0000-0002-5518-4607
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.ORCID iD: 0000-0001-7388-4175
RISE Research Institutes of Sweden, Safety and Transport, Measurement Technology.
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2020 (English)In: Proceedings of the Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI, Institute of Electrical and Electronics Engineers Inc. , 2020, p. 169-180Conference paper, Published paper (Refereed)
Abstract [en]

RISE Research Institutes of Sweden is since 2018 the result of a rebranding of SP Technical Research Institute of Sweden and several other national research facilities and test beds in Sweden. This also comprises most national metrology institute (NMI) activities, including time and frequency that is still located at its Borås facilities in the southwest of Sweden since 1995. UTC(SP) remains the official designation of the Swedish UTC(k) realization. It is realized in a classical master clock and phase stepper setup and is locally distributed to different users and time transfer applications. The most recent local clock ensemble consists of four hydrogen masers and three high performance 5071A Cs standards. UTC(SP) is linked to TAI using TWSTFT and GNSS. The primary link is a combination TWGPPP with current calibration uncertainties of 1.1 ns. The time scale is regularly kept within ±5 ns of UTC. RISE has also established several distributed UTC(SP) copies, with both local backups in Borås and facilities at remote sites linked together by GNSS time transfer. Network time distribution at those sites make UTC(SP) publicly available. Additionally, RISE offers several calibration services for the distribution of UTC-traceable time and frequency signals. Time and frequency related metrological research at RISE is mostly concentrated on further refinement of GNSS and TWSTFT methods, their calibration and the dissemination using those methods. We are also active in research on fiber based optical time and frequency transfer. Outside the metrological responsibilities, many research projects focus on establishing metrological aspects of time and frequency within for instance the automotive and maritime domain.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc. , 2020. p. 169-180
Keywords [en]
Clocks, Hydrogen masers, Time measurement, Calibration uncertainty, National metrology institutes, Research facilities, Research institutes, Technical research, Time and frequencies, Time and frequency transfers, Time distribution, Calibration
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-44903DOI: 10.33012/2020.17297Scopus ID: 2-s2.0-85081552388ISBN: 0936406259 (print)OAI: oai:DiVA.org:ri-44903DiVA, id: diva2:1431356
Conference
51st Annual Precise Time and Time Interval Systems and Applications Meeting, PTTI 2020, 21 January 2020 through 24 January 2020
Note

Funding details: National Measurement Institute, NMI; Funding details: VINNOVA; Funding text 1: RISE has inherited the function of the Swedish NMI from SP Technical Research Institute of Sweden in 2018 when the RISE institutes Innventia, Swerea, SP and Swedish ICT merged to create a stronger research and innovation partner for businesses and society. The intention is to make industrial research institutes internationally more competitive and to facilitate continued sustainable growth in Sweden by strengthening competitiveness and renewal in the business community [1]. RISE is appointed as the Swedish NMI by the Ministry of Enterprise and Innovation. The NMI is funded from Vinnova [2], Sweden’s innovation agency and any strategic decisions are made by an advisory board composed of experts from Swedish industry. Vinnova decides the level of NMI funding and also the Swedish level of participation in European funded research of the EMPIR program and its possible successor.; Funding text 2: This report was supported by the Swedish National Metrology Program, program owner Swedish Agency for Innovation Systems (VINNOVA). We acknowledge the work of the BIPM, the CCTF and EURAMET, further the Swedish Post and Telecom Authority (PTS) who finances critical Swedish communication infrastructure and thereby strengthens resiliency in national timing.

Available from: 2020-05-20 Created: 2020-05-20 Last updated: 2023-06-08Bibliographically approved

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Rieck, CarstenJaldehag, KennethEbenhag, Sven-ChristianHedekvist, Per Olof

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