[LEAPSECS] DUT1 about to backtrack

[Michael Deckers]

On 2021-01-08 19:57, John Sauter via LEAPSECS wrote:

> I attach a plot of historical values of DUT1 based on the old issues of
> Bulletin A kept on the IERS' web site.



    I think the graph of DUT1 is not quite correct, for instance:

    On 2009-01-01, there was a switch of DUT1 from -0.6 s to +0.4 s due 
to a leap second (Bulletin C36)
    On 2009-03-12, there was a switch of DUT1 from +0.4 s to +0.3 s 
(Bulletin D102)
    Your graph only has one switch, on 2009-01-01 from -0.6 s to +0.3 s

    Michael Deckers.