New technologies and future of time keeping

ARIAS, Felicitas

Time metrology and time keeping undergo dramatic improvements in the last decade. Optical frequency standards overcome in accuracy caesium fountains by two orders of magnitude; research on time and frequency transfer focus on techniques and methods adequate to the comparison of ultra-accurate clocks; time dissemination enlarges and users become more demanding.

The redefinition of the SI second will be a major change in time metrology, but in parallel new procedures will be implemented to beat the rhythm of time keeping: more performing clock comparisons (accurate satellite time and frequency transfer, dense and permanent optic fibre networks, space techniques); refined algorithms for better clock characterization; new strategies for international clock comparisons.

This presentation will make the inventory of the latest outcomes and extrapolate the progress in national and international time keeping in the years to come.

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