On 2023-11-26 06:59, Steve Allen wrote:
This week began the meeting of ITU-R WRC 23. One preparation for this
meeting was a document issued early this year
The future of Coordinated Universal Time
https://www.itu.int/en/itunews/Documents/2023/2023-02/2023_ITUNews02-en.pdf
This looks at the use of time in several arenas, many of which would
like UTC to stop having leap seconds. ............................
The result of resolution 655 of WRC 2015 is ITU-R document TF 2511-0,
online at [https://www.itu.int/oth/R0A08000007/en]. It gives an
overview of how users of UTC are affected by the current (discontinuous)
form of UTC and by the proposed continuous form; it was written before
the CGPM decision of 2022 on the change in UTC.
.................................... Many also allow that keeping
agreement with the earth in the long run is necessary, and that they
have no idea how to do that.
A working group of the CCTF has since been charged with developing
(among other, more important things) a proposal for measures to
constrain |UT1 - UTC| after the new bound is reached. Since such
measures would only apply in over 100 years, when the requirements for a
reference time scale cannot reliably be predicted, anything beyond a
necessarily incomplete list of possibilities (a discontinuous step,
change in the rate d(UTC)/d(TT), using predictions of UT1 - UTC, etc)
would be wasted effort.
Michael Deckers.
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