Standard frequency and time signal service: Difference between revisions

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[[File:YVTO time.ogg|thumb|{{center|Radiocommunication signal of the time signal transmitter station [[YVTO]]}}]]

'''Standard frequency and time signal service''' (short: '''SFTS''') is –, according to ''Article 1.53'' of the [[International Telecommunication Union|International Telecommunication Union's]] (ITU) [[ITU Radio Regulations|Radio Regulations]] (RR),<ref name="ReferenceA">ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.53, definition: ''standard frequency and time signal service''</ref> – defined as ''«"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''".»

==Classification==

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In general this ''radiocommunication service '' uses radio stations as follows:

*[[Standard frequency and time signal station]]sstations (article 1.95)

==Standard frequency and time signal-satellite service==

[[File:Dezhurov GTS-21.jpg|thumb|250px|{{center|GTS-Module onboard ISS, handled by [[astronaut]] [[Vladimir Dezhurov]]}}]]

''' Standard frequency and time signal-satellite service ''' (short: '''SFTSS''') is, according to ''Article 1.54'' of the [[International Telecommunication Union|International Telecommunication Union's]] (ITU) [[ITU Radio Regulations|Radio Regulations]] (RR),<ref>ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.54, definition: ''standard frequency and time signal-satellite service''</ref> defined as ''A radiocommunication service using [[space radio station|space stations]] on earth [[satellite]]s for the same purposes as those of the standard frequency and time signal service''.

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]]).

==Frequency allocation==

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* [[Time synchronization in North America]]

* [[Radio Clock]]

* [[Time_signal#Radio_time_sources]]

==References ==

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== External links ==

* [https://web.archive.org/web/20060421225303/http://tf.nist.gov/ NIST Time and Frequency Division]

* [http://www.nplindia.org/time-and-frequency-standards NPL India Time and Frequency Standards]'''Bad Link'''

{{Radiocommunication services ITU}}