Activities and Updates at the State Time and Frequency Standard of Russia

Y. Domnin, N. Koshelyaevsky, V. Kostromin, P. Krasovsky, and V. Palchikov

Abstract:	As it was announced, a campaign on the State Time and Frequency Standard modernization is under realization. A new prototype of the primary Cs fountain standard with an uncertainty of 3x10^15 is under metrological investigation, which is expected to be finished at the end of 2009. For today, we have two new ensembles each of four H-masers of type of CH1-75A with individual cavity auto-tuning systems. The whole instrumentation set includes distribution amplifiers, a frequency and time measuring system, and a real-time time scale generation and distributing system. All these instruments are installed in thermally and humidity controlled chambers. Typical temperature and relative humidity variations are well below 0.1 oC and ~1% respectively. As a result, the frequency stability of the H-masers on a 1-day basis is about few parts in 10^16. The new remote clock comparison system consists of several multichannel dual-frequencyGLONASS/GPS TTS-3 receivers. All receivers have been differentially calibrated relative to a portable receiver as part of a calibration campaign arranged by the BIPM. A TWSTFT station is under construction in VNIIFTRI. The closest main goal is to arrange a time link to PTB and NICT via the IS-4 satellite. The same instrumentation set (four H-masers, a frequency and time measuring system, and time transfer equipment) will be installed in secondary laboratories in Novosibirsk, Irkutsk, Khabarovsk, and Petropavlovsk Kamchatsky.
Published in:	Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting November 16 - 19, 2009 Hyatt Regency Tamaya Resort Santa Ana Pueblo, New Mexico
Pages:	175 - 182
Cite this article:	Domnin, Y., Koshelyaevsky, N., Kostromin, V., Krasovsky, P., Palchikov, V., "Activities and Updates at the State Time and Frequency Standard of Russia," Proceedings of the 41st Annual Precise Time and Time Interval Systems and Applications Meeting, Santa Ana Pueblo, New Mexico, November 2009, pp. 175-182.
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