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VLBI Time and Frequency Transfer Using the New Generation Radio Interferometer

A. Tsaruk, D. Ivanov, E. Zhykov, A. Karpichev

Transactions of IAA RAS, вып. 50, 79–86 (2019)

Keywords: VLBI, comparison of time scales, comparison of frequencies for remote standards, new generation VLBI system

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Abstract

We have made a longer than a year comparison of the observatories’ time and frequency scales using our new generation radio interferometer of the “Quasar” VLBI network. This article describes the method we used and its accuracy characteristics investigated. It shows that the uncertainty figures (which characterise a random component of the error occuring when we measure the differences between the time scales of the Badary and Zelenchukskaya observatories) are less than 40 ps on the averaging interval from 1 to 10 hours. The instability figure (which is obtained when we measure the frequency difference between these time scales) is $1·10^{-15}$ on the averaging interval of more than 24 hours. Moreover, we have received smaller than 0.5 ns uncertainty which characterises the systematic component of the measurement errors occuring when time scales are compared. The distance between this experiment’s time scales was 4400 km.

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A. Tsaruk, D. Ivanov, E. Zhykov, A. Karpichev. VLBI Time and Frequency Transfer Using the New Generation Radio Interferometer // Transactions of IAA RAS. — 2019. — Вып. 50. — P. 79–86.

@article{tsaruk2019,
  abstract = {We have made a longer than a year comparison of the observatories’ time and frequency scales using our  new generation radio interferometer of the “Quasar” VLBI network. This article describes the method we used and its accuracy characteristics investigated. It shows that the uncertainty figures (which characterise a random component of the error occuring when we measure the differences between the time scales of the Badary and Zelenchukskaya observatories) are less than 40 ps on the averaging interval from 1 to 10 hours. The instability figure (which is obtained when we measure the frequency difference between these time scales) is $1·10^{-15}$ on the averaging interval of more than 24 hours. Moreover, we have received smaller than 0.5 ns uncertainty which characterises the systematic component of the measurement errors occuring when time scales are compared. The distance between this experiment’s time scales was 4400 km.},
  author = {A. Tsaruk and D. Ivanov and E. Zhykov and A. Karpichev},
  doi = {10.32876/ApplAstron.50.79-86},
  issue = {50},
  journal = {Transactions of IAA RAS},
  keyword = {VLBI, comparison of time scales, comparison of frequencies for remote standards, new generation VLBI system},
  pages = {79--86},
  title = {VLBI Time and Frequency Transfer Using the New Generation Radio Interferometer},
  url = {http://iaaras.ru/en/library/paper/2002/},
  year = {2019}
}

TY  - JOUR
TI  - VLBI Time and Frequency Transfer Using the New Generation Radio Interferometer
AU  - Tsaruk, A.
AU  - Ivanov, D.
AU  - Zhykov, E.
AU  - Karpichev, A.
PY  - 2019
T2  - Transactions of IAA RAS
IS  - 50
SP  - 79
AB  - We have made a longer than a year comparison of the observatories’
time and frequency scales using our  new generation radio
interferometer of the “Quasar” VLBI network. This article describes
the method we used and its accuracy characteristics investigated. It
shows that the uncertainty figures (which characterise a random
component of the error occuring when we measure the differences
between the time scales of the Badary and Zelenchukskaya
observatories) are less than 40 ps on the averaging interval from 1
to 10 hours. The instability figure (which is obtained when we
measure the frequency difference between these time scales) is
$1·10^{-15}$ on the averaging interval of more than 24 hours.
Moreover, we have received smaller than 0.5 ns uncertainty which
characterises the systematic component of the measurement errors
occuring when time scales are compared. The distance between this
experiment’s time scales was 4400 km.
DO  - 10.32876/ApplAstron.50.79-86
UR  - http://iaaras.ru/en/library/paper/2002/
ER  -