On Tue 2022-07-26T20:42:03-0400 Brooks Harris hath writ:
> Can anyone elaborate on what these 'decadal variations' may be?
What they are is power in the spectrum of LOD at periods of decades
that has been visible in the relatively good data from the past two
centuries and which contributed to the
On Tue 2022-07-26T23:33:15+ Poul-Henning Kamp hath writ:
> So looking at the IERS LOD plot going all the way back it seems to
> me that we have been missing the big signal for about five decades:
>
>
> https://datacenter.iers.org/singlePlot.php?plotname=EOPC04_14_62-NOW_IAU2000A-LOD=224
On Tue, Jul 26, 2022 at 5:33 PM Poul-Henning Kamp
wrote:
> So looking at the IERS LOD plot going all the way back it seems to
> me that we have been missing the big signal for about five decades:
>
>
> https://datacenter.iers.org/singlePlot.php?plotname=EOPC04_14_62-NOW_IAU2000A-LOD=224
>
> How
If you go back I'm sure you'll see it mentioned in the LEAPSECS archive.
When you play with 1962+ data there's a clear ~20 year cycle [1] and,
more importantly, LOD ends up a bit lower each cycle. So the general
pattern looks like 20 year arcs back-to-back on top of a gradual trend
of ELOD
On 2022-07-26 7:33 PM, Poul-Henning Kamp wrote:
So looking at the IERS LOD plot going all the way back it seems to
me that we have been missing the big signal for about five decades:
https://datacenter.iers.org/singlePlot.php?plotname=EOPC04_14_62-NOW_IAU2000A-LOD=224
How did we not
So looking at the IERS LOD plot going all the way back it seems to
me that we have been missing the big signal for about five decades:
https://datacenter.iers.org/singlePlot.php?plotname=EOPC04_14_62-NOW_IAU2000A-LOD=224
How did we not notice that earlier ?
--
Poul-Henning Kamp
On 2022-07-26 05:08, Steve Allen wrote:
The CNET article includes a quote from correspondence which
repeats a trick that has been performed since the 1960s, that
being to produce a significant underestimate of the difference
between solar and atomic time by saying that the absence of
leap
