[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.


    After closure of work related to resolution 655 of WRC 2015
    at the World Radio Conference 2023 in Dubai, the BIPM has added
    the web page
        [https://www.bipm.org/en/-/2023-12-12-wrc-dubai]

    One particular technical aspect is mentioned on this page: some
    lead time is required to adapt the (few) radio time signals that
    disseminate the approximation DUT1 of UT1 - UTC to the larger
    range of |UT1 - UTC| that will be allowed after 2035.
    This is worded quite implicitly, so that one cannot be sure

    ∙ whether there will still be an official approximation of
      of UT1 - UTC after 2035, similar to the one currently
      produced by the IERS with Bulletin D;

    ∙ if, yes, what the resolution and the range of that
      approximation would be.

    The CIPM will certainly try to avoid to introduce an official
    approximation of UT1 - UTC with a resolution of whole seconds
    and whose values change only at the end of a UTC month.

    Michael Deckers.