А.S. Tolstikov - Dr.Sc. (Eng.), Head of the Time and Frequency Service, SNIIM Siberian Research Institute of Metrology, Novosibirsk. E-mail: tolstikov@mail.ksn.ru А.А. Karaush - Research Scientist, SNIIM Siberian Research Institute of Metrology, Novosibirsk. E-mail: karaush.a@mail.ru Е.А. Khanikova - Research Scientist, SNIIM Siberian Research Institute of Metrology, Novosibirsk. E-mail: hanikovak@mail.ru А.R. Bezrodnykh - Post-graduate Student, Department of «Metrology and Optical Instrument Engineering», SNIIM Siberian Research Institute of Metrology, Novosibirsk. E-mail: a.bezrodnykh@mail.ru