showstack / standards / itu-r-tf-460
ITU-R TF.460
Standard-frequency and time-signal emissions
Scope
The recommendation that defines UTC as a time scale: how it relates to International Atomic Time (TAI), and the leap-second mechanism that keeps it within a fraction of a second of the earth's rotation.
Notes
Relevant on a show because the three time scales in the rack are not the same: UTC includes leap seconds, TAI does not, and GNSS time is offset from both. A device that mixes them up is out by whole seconds, not milliseconds.
Where to get it
Related protocols
Sources
- Recommendation ITU-R TF.460 — International Telecommunication Union primary
Understand the mechanism
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