[LEAPSECS] prep for WRC 23

[Michael Deckers]

    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.