Standard time and frequency signal

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This article is about the national Standard time and frequency signal for the reception in the USA and should not be confused with the standard frequency and time signal service intended for global general utilization in lint to ITU Radio Regulations, article 1.53.

The Standard Time and Frequency Signal (STFS) is a Radiocommunication service providing the transmission of specified frequency and time signal, of stated high precision, intended for general reception in the United States and beyond. The radio signals are broadcast on very precise carrier frequencies by the U.S. Naval Observatory and the National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards (NBS). The technical specification of that particular service is in line to the provisions of the International Telecommunication Union´s (ITU) Radio Regulations (RR)[1]

Utilization in other countries[edit]

A similar service is operated in the United Kingdom by the National Physical Laboratory, broadcasting from Anthorn radio station in north-west England, and by the BBC using the 198 kHz carrier of the Radio 4 national radio station with a frequency accuracy of 1 part in 1011.

See also


  1. ^ ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.53, definition: standard frequency and time signal service

External links[edit]