The IERS specifies in Bulletin A the value for DUT1, which is an approximation of UT1-UTC that is transmitted with time signals. The current value is -0.2, which has not changed since May of 2019, an unusually long time.
If the IERS prediction of future values of UT1-UTC turns out to be
correct, the value of DUT1 will increase to -0.1 in July of 2021.
Other than the jumps caused by leap seconds, that will be the first
increase in DUT1 since at least 2005.
I attach a plot of historical values of DUT1 based on the old issues of
Bulletin A kept on the IERS' web site.
John Sauter (john_sau...@systemeyescomputerstore.com)
--
get my PGP public key with gpg --locate-external-keys
john_sau...@systemeyescomputerstore.com
DUT1.pdf
Description: Adobe PDF document
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