2017A&A...603A..48K


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET17:32:53

2017A&A...603A..48K - Astronomy and Astrophysics, volume 603A, 48-48 (2017/7-1)

Fibre-optic delivery of time and frequency to VLBI station.

KREHLIK P., BUCZEK L., KOLODZIEJ J., LIPINSKI M., SLIWCZYNSKI L., NAWROCKI J., NOGAS P., MARECKI A., PAZDERSKI E., ABLEWSKI P., BOBER M., CIURYLO R., CYGAN A., LISAK D., MASLOWSKI P., MORZYNSKI P., ZAWADA M., CAMPBELL R.M., PIECZERAK J., BINCZEWSKI A. and TURZA K.

Abstract (from CDS):

The quality of Very Long Baseline Interferometry (VLBI) radio observations predominantly relies on precise and ultra-stable time and frequency (T&F) standards, usually hydrogen masers (HM), maintained locally at each VLBI station. Here, we present an operational solution in which the VLBI observations are routinely carried out without use of a local HM, but using remote synchronization via a stabilized, long-distance fibre-optic link. The T&F reference signals, traceable to international atomic timescale (TAI), are delivered to the VLBI station from a dedicated timekeeping laboratory. Moreover, we describe a proof-of-concept experiment where the VLBI station is synchronized to a remote strontium optical lattice clock during the observation.

Abstract Copyright: © ESO, 2017

Journal keyword(s): instrumentation: high angular resolution - instrumentation: interferometers - instrumentation: interferometers

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 4C 28.07 QSO 02 37 52.40567732 +28 48 08.9900231     18.5 16.99   ~ 488 1
2 8C 2007+777 BLL 20 05 30.9981060951 +77 52 43.245329882     16.5 17.36   ~ 396 1

    Equat.    Gal    SGal    Ecl

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2019.12.08-17:32:53

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