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## VLBI Time and Frequency Transfer Using the New Generation Radio Interferometer

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

### 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.

### Citation

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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 -