Products & Services
- The annual maintenance period for the Anthorn site is from Monday 14 April to Thursday 1 May 2014 (inclusive).
- NPL is supporting the GREAT Britain campaign, which showcases what Britain has to offer to the international community.
- The NPL caesium fountain atomic clock (NPL-CsF2) has been declared accurate to one second in 158 million years.
- Happy 90th Birthday to BBC Radio's 'time pips'.
- The European Physical Society (EPS) names NPL the birthplace of atomic timekeeping.
The Time and Frequency group is responsible for operating the national time scale UTC(NPL) and disseminating time throughout the UK. Our caesium fountain primary frequency standard measures the SI second at the highest accuracy, and we contribute to the generation of the world’s reference time scale UTC. We also maintain and disseminate another of the seven base SI units: the metre.
We carry out a broad programme of research in time and frequency metrology. A major activity is the development and characterisation of a new generation of optical atomic clocks based on laser-cooled trapped ions and atoms, which may lead to a future redefinition of the SI second. Potential applications of these clocks range from improved satellite navigation systems to sensitive tests of fundamental physical theories.
Other areas of current research include the development of compact and user-friendly frequency standards for industrial applications and unique algorithms for processing clock data to generate the most stable reference time scales achievable.
National Time Scale
NPL's Peter Whibberley discusses the National Time Scale