[tz] Fractional seconds in zic input

Steve Allen sla at ucolick.org
Mon Feb 5 22:45:52 UTC 2018

On Mon 2018-02-05T15:32:06-0700 Brian Inglis hath writ:
> Have the ITU not dropped those requirements?

The current rec is
It still demands 1 ms.

> Digital production and distribution systems introduce many ms to s delays in
> broadcast time signals, even non-FM BBC stations, and many stations are off UTC
> by seconds from higher precision sources like NTP and GPS.

TF.460 is not about generic broadcasts of content, it is about
broadcasts whose specific purpose is to be precision time signals.
But most devices which provide access to precise values of UTC obtain
that using newer technologies, not from these radio broadcasts.

Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
UCO/Lick Observatory--ISB 260  Natural Sciences II, Room 165  Lat  +36.99855
1156 High Street               Voice: +1 831 459 3046         Lng -122.06015
Santa Cruz, CA 95064           http://www.ucolick.org/~sla/   Hgt +250 m

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