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Time Transfer betwe...
Time Transfer between UTC(SP) and UTC(MIKE) Using Frame Detection in Fiber-Optical Communication networks
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- Ebenhag, Sven-Christian, 1976 (författare)
- SP Sveriges Tekniska Forskningsinstitut AB,Chalmers tekniska högskola,Chalmers University of Technology
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- Jaldehag, R. T. Kenneth, 1962 (författare)
- SP Sveriges Tekniska Forskningsinstitut AB,Chalmers tekniska högskola,Chalmers University of Technology
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- Rieck, Carsten, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Jarlemark, Per O. J., 1962 (författare)
- SP Sveriges Tekniska Forskningsinstitut AB,Chalmers tekniska högskola,Chalmers University of Technology
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- Hedekvist, Per Olof E, 1967 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Löthberg, Peter (författare)
- SP Sveriges Tekniska Forskningsinstitut AB
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- Fordell, Thomas (författare)
- SP Sveriges Tekniska Forskningsinstitut AB,Centre for Metrology and Accreditation Finland
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- Merimaa, Mikko (författare)
- SP Sveriges Tekniska Forskningsinstitut AB,Centre for Metrology and Accreditation Finland
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visa färre...
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(creator_code:org_t)
- ISBN 9781622767953
- 2011
- 2011
- Engelska.
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Ingår i: 43rd Precise Time and Time Interval (PTTI) Systems and Applications Meeting. - 9781622767953 ; , s. 431-441
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- This paper presents recent results from a time transfer method using passive listening and detection of SDH frame headers in fiber-optical networks. The results are based on an experimental fiber-link that is implemented between the national time and frequency laboratories at SP in Borås, Sweden and at MIKES in Espoo, Finland with an intermediate connection at STUPI time and frequency facility in Stockholm, Sweden. The total fiber length exceeds 1129 km and is implemented in SUNET (Swedish University Network) and FUNET (Finnish University and Research Network). The two networks are connected via NORDUnet (Nordic Infrastructure for Research & Education) and the links are DWDM-based (Dense Wavelength Division Multiplexing).Both SP and MIKES maintains local representations of UTC and contributes with clock data to TAI, which gives the opportunity to compare the fiber-based method with those independent methods that are used regularly by the laboratories for the links to UTC. Preliminary results show that a time transfer stability of less than 10 picoseconds is obtained for averaging times of a few hundred seconds. The results also show that the method suffers from daily variations of a few nanoseconds, presumable due to temperature sensitive network equipment and asymmetric fiber paths. Nevertheless, a comparison to GPS carrier phase time transfer over three months shows an rms-agreement of less than 1 nanosecond.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Annan teknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Other Engineering and Technologies (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
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