Details
Original language | English |
---|---|
Article number | 045005 |
Journal | METROLOGIA |
Volume | 57 |
Issue number | 4 |
Publication status | Published - 21 Jul 2020 |
Abstract
We carried out a 26-day comparison of five simultaneously operated optical clocks and six atomic fountain clocks located at INRIM, LNE-SYRTE, NPL and PTB by using two satellite-based frequency comparison techniques: broadband Two-Way Satellite Time and Frequency Transfer (TWSTFT) and Global Positioning System Precise Point Positioning (GPS PPP). With an enhanced statistical analysis procedure taking into account correlations and gaps in the measurement data, combined overall uncertainties in the range of 1.8 × 10-16 to 3.5 × 10-16 for the optical clock comparisons were found. The comparison of the fountain clocks yields results with a maximum relative frequency difference of 6.9 × 10-16, and combined overall uncertainties in the range of 4.8 × 10-16 to 7.7 × 10-16.
Keywords
- cesium fountain clocks, GPS, optical clocks, remote clock comparison, two-way satellite time and frequency transfer, weighted autocovariance estimate
ASJC Scopus subject areas
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In: METROLOGIA, Vol. 57, No. 4, 045005, 21.07.2020.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Direct comparisons of European primary and secondary frequency standards via satellite techniques
AU - Riedel, F.
AU - Al-Masoudi, A.
AU - Benkler, E.
AU - Dörscher, S.
AU - Gerginov, V.
AU - Grebing, C.
AU - Häfner, S.
AU - Huntemann, N.
AU - Lipphardt, B.
AU - Lisdat, C.
AU - Peik, E.
AU - Piester, D.
AU - Sanner, C.
AU - Tamm, C.
AU - Weyers, S.
AU - Denker, H.
AU - Timmen, L.
AU - Voigt, C.
AU - Calonico, D.
AU - Cerretto, G.
AU - Costanzo, G. A.
AU - Levi, F.
AU - Sesia, I.
AU - Achkar, J.
AU - Guéna, J.
AU - Abgrall, M.
AU - Rovera, D.
AU - Chupin, B.
AU - Shi, C.
AU - Bilicki, S.
AU - Bookjans, E.
AU - Lodewyck, J.
AU - Le Targat, R.
AU - Delva, P.
AU - Bize, S.
AU - Baynes, F. N.
AU - Baynham, C. F.A.
AU - Bowden, W.
AU - Gill, P.
AU - Godun, R. M.
AU - Hill, I. R.
AU - Hobson, R.
AU - Jones, J. M.
AU - King, S. A.
AU - Nisbet-Jones, P. B.R.
AU - Rolland, A.
AU - Shemar, S. L.
AU - Whibberley, P. B.
AU - Margolis, H. S.
PY - 2020/7/21
Y1 - 2020/7/21
N2 - We carried out a 26-day comparison of five simultaneously operated optical clocks and six atomic fountain clocks located at INRIM, LNE-SYRTE, NPL and PTB by using two satellite-based frequency comparison techniques: broadband Two-Way Satellite Time and Frequency Transfer (TWSTFT) and Global Positioning System Precise Point Positioning (GPS PPP). With an enhanced statistical analysis procedure taking into account correlations and gaps in the measurement data, combined overall uncertainties in the range of 1.8 × 10-16 to 3.5 × 10-16 for the optical clock comparisons were found. The comparison of the fountain clocks yields results with a maximum relative frequency difference of 6.9 × 10-16, and combined overall uncertainties in the range of 4.8 × 10-16 to 7.7 × 10-16.
AB - We carried out a 26-day comparison of five simultaneously operated optical clocks and six atomic fountain clocks located at INRIM, LNE-SYRTE, NPL and PTB by using two satellite-based frequency comparison techniques: broadband Two-Way Satellite Time and Frequency Transfer (TWSTFT) and Global Positioning System Precise Point Positioning (GPS PPP). With an enhanced statistical analysis procedure taking into account correlations and gaps in the measurement data, combined overall uncertainties in the range of 1.8 × 10-16 to 3.5 × 10-16 for the optical clock comparisons were found. The comparison of the fountain clocks yields results with a maximum relative frequency difference of 6.9 × 10-16, and combined overall uncertainties in the range of 4.8 × 10-16 to 7.7 × 10-16.
KW - cesium fountain clocks
KW - GPS
KW - optical clocks
KW - remote clock comparison
KW - two-way satellite time and frequency transfer
KW - weighted autocovariance estimate
UR - http://www.scopus.com/inward/record.url?scp=85081580975&partnerID=8YFLogxK
U2 - 10.48550/arXiv.1910.06736
DO - 10.48550/arXiv.1910.06736
M3 - Article
AN - SCOPUS:85081580975
VL - 57
JO - METROLOGIA
JF - METROLOGIA
SN - 0026-1394
IS - 4
M1 - 045005
ER -