Clivati, CeciliaCeciliaClivatiAiello, RobertoRobertoAielloBianco, GiuseppeGiuseppeBiancoBORTOLOTTI, ClaudioClaudioBORTOLOTTIDi Sarno, ValentinaValentinaDi SarnoMaddaloni, PasqualePasqualeMaddaloniLevi, FilippoFilippoLeviMACCAFERRI, GiuseppeGiuseppeMACCAFERRIMura, AlbertoAlbertoMuraNEGUSINI, MONIAMONIANEGUSINIPERINI, FEDERICOFEDERICOPERINIROMA, MAUROMAUROROMARICCI, ROBERTOROBERTORICCIAmato, Luigi SantamariaLuigi SantamariaAmatode Cumis, Mario SicilianiMario Sicilianide CumisSTAGNI, MatteoMatteoSTAGNICalonico, DavideDavideCalonico2023-10-262023-10-262020978-1-943580-76-7http://hdl.handle.net/20.500.12386/34460We realize a phase-stabilised optical fiber backbone that connects the Italian National Metrology Institute with two radio telescopes over a 600 km baseline. This allows referencing of Very Long Baseline Interferometry (VLBI) facilities with the best atomic frequency standards available today and the implementation of a common-clock architecture, which we are now using to assess VLBI ultimate performances.ELETTRONICOenConference paper10.1364/CLEO_SI.2020.SM2N.410.1364/CLEO_SI.2020.SM2N.4https://opg.optica.org/abstract.cfm?URI=CLEO_SI-2020-SM2N.4FIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation