Time Frequency Dissemination in the UK

摘要

This paper provides a qualitative review of those standard-frequency and time signals available in the UK which can be used to trace time and frequency measurements to national standards. Particular emphasis is given to use of the Global Positioning System, as well as the more traditional terrestrial radio broadcasts from Rugby on 60 kHz and Droitwich on 198 kHz. A brief mention is given to telephone and inter-net time services, where similar traceability principles apply but where they are likely to be in demand from a new and wider community because of the growth in electronic commerce.