Mark,
If the planet were not inclined 23 degrees this might make sense. But it turns
out daylight times differ by latitude and season and hemisphere. So it is not
surprising that nations, or even states within large nations, assume the right
to set their own rules of local time.
/tvb
On Jul 1
I've been told the NERC has decided to postpone their July 14 TEC-elimination
test.
Sorry I don't have a URL with more information.
Those of you logging 60 Hz data should continue.
As you know from my web site, measuring any sort of time/freq source is
interesting.
If nothing else you will have a
A primary frequency standard is one that faithfully implements the definition
of the SI second. Thus primary standards are based on Cs. But not all Cs-based
clocks are primary. CSAC, for example, is not a primary standard. Rubidium,
hydrogen, quartz, or pendulum clocks are not primary.
The defi
> Absolutely, but you can still pull a new Cs out of the box and it will
> run at the same frequency as your old Cs.
Not quite "the same". This is called the re-trace spec which is poorer than the
stability spec. Vintage Cs standards like the 5060 or 5061 powered up within
about 1e-10 or 1e-11.
> 1E14 we might be able to notice
Hal,
No. Look at the adev of the earth (earlier posting). The length of earth day
varies in the *milli*second range, day to day. VLBI measurements are under 0.1
millisecond, which comes to about 1e-9 resolution.
Realize that none of the NASA "earthquake may ha
Antonio, and other posters,
The issue of leap seconds is covered in the "LEAPSECS" mailing list rather than
time-nuts.
You can find the archives at:
http://six.pairlist.net/mailman/listinfo/leapsecs
Please move your well thought out questions or comments to that list.
Thanks,
/tvb
> So what is the Allan deviation of the earth spinning? :)
http://www.leapsecond.com/museum/earth/
/tvb
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