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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/26988
Title: A VLBI experiment using a remote atomic clock via a coherent fibre link
Authors: Clivati, Cecilia
AMBROSINI, ROBERTO
Artz, Thomas
Bertarini, Alessandra
BORTOLOTTI, CLAUDIO 
Frittelli, Matteo
Levi, Filippo
Mura, Alberto
MACCAFERRI, GIUSEPPE 
NANNI, MAURO 
NEGUSINI, MONIA 
PERINI, FEDERICO 
ROMA, MAURO 
STAGNI, Matteo 
Zucco, Massimo
Calonico, Davide
Issue Date: 2017
Journal: SCIENTIFIC REPORTS 
Number: 7
Issue: 1
First Page: 40992
Abstract: We describe a VLBI experiment in which, for the first time, the clock reference is delivered from a National Metrology Institute to a radio telescope using a coherent fibre link 550 km long. The experiment consisted of a 24-hours long geodetic campaign, performed by a network of European telescopes; in one of those (Medicina, Italy) the local clock was alternated with a signal generated from an optical comb slaved to a fibre-disseminated optical signal. The quality of the results obtained with this facility and with the local clock is similar: interferometric fringes were detected throughout the whole 24-hours period and it was possible to obtain a solution whose residuals are comparable to those obtained with the local clock. These results encourage further investigation of the ultimate VLBI performances achievable using fibre dissemination at the highest precision of state-of-the-art atomic clocks.
URI: http://hdl.handle.net/20.500.12386/26988
URL: https://www.nature.com/articles/srep40992
ISSN: 2045-2322
DOI: 10.1038/srep40992
Bibcode ADS: 2017NatSR...740992C
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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