[LEAPSECS] Never mind DUT1, what happened to dX ?

[Poul-Henning Kamp]

--------
Steve Allen writes:
> On Mon 2022-03-07T06:33:31+0000 Poul-Henning Kamp hath writ:
> > I looked at the Bulletin A plots this morning to see how DUT1 is
> > developing, but then I noticed the 'dX' term plot:
> >
> >       https://datacenter.iers.org/singlePlot.php?plotname=BulletinA_All-DX&id=6
> >
> > What happened in late 2019 ?
>
> 2019 October is when USNO had to take their machines offline due to
> new security requirements.

But why would that affect only the dX plot ?

> Those artifacts do not show at the ObsPM site
> https://hpiers.obspm.fr/eop-pc/index.php?index=analysis&lang=en

I'm not talking about the two spikes, I'm talking about the oscillation disappearing,
and that seems to be in all the data sources ?

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