Speaker
Albin Czubla
(Cental Office of Measures, Poland)
Description
Time and frequency metrology is the basis for the functioning of the modern world and sets a new frontiers of knowledge in science. SI second is the most accurate realized fundamental unit of physical quantity. It requires the complex sophisticated time keeping system and analysis of the atomic clocks and primary frequency standard behaviour in short and long-term. In the lecture the international system of time keeping will be presented, including a basic concepts, assumptions and tools applied to validate the quality of atomic clocks, timescales, or time transfer links. The future redefinition of SI second, i.e. conversion into the optical definition, and possible options of its realization will be discussed.
