National (State Primary) Standard of Time and Frequency Units

Reproduction and maintenance of the unit of time – second, the unit of frequency – Hertz, keeping of national scale of coordinated time UTC (UA).

Dissemination of sizes of the units of time and frequency and national scale of coordinated time of Ukraine to the secondary and working standards and also to working instruments of measuring technology by means of comparisons with the help of a comparator (quantum clock, which can be transported) by means of the method of indirect measurements (with the help of the signals of satellite radionavigation systems, standard signals of time and frequency, which are transported through the television, and also with the use of radiometeoric and other communications channels) and by means of direct comparison in accordance with DSTU 3538:2009 “Metrology. National verification scheme for measuring instruments for time and frequency”.

Metrological characteristics


time: from 1∙10-10 s to 1∙10-8 s

frequency: from 1,0 Hz to 7∙10-10 Hz

Uncertainty by type A (uA)


Uncertainty by type B (uB)


Total standard uncertainty (uC)


Extended uncertainty (U)