Standard frequency and time signal service

Standard frequency and time signal service (short: SFTS) is, according to Article 1.53 of the International Telecommunication Union's (ITU) Radio Regulations (RR),[1] "A radiocommunication service for scientific, technical and other purposes, providing the transmission of specified frequencies, time signals, or both, of stated high precision, intended for general reception".

An example to this were experiments of time synchronisation (Global Transmission Services GTS-2) onboard International Space Station.

However, in accordance to the ubiquitous availability, GNSS-satellite signals will be used in practice (see also: GPS disciplined oscillator).

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 technical specification of that particular service is in line to the provisions of the International Telecommunication Union's (ITU) Radio Regulations (RR)[1]

Standard frequency and time signal radio station DCF77
Radiocommunication signal of the time signal transmitter station YVTO
GTS-Module onboard ISS, handled by astronaut Vladimir Dezhurov