[time-nuts] Eclipses and atomic clocks
iovane at inwind.it
iovane at inwind.it
Tue Nov 25 14:07:54 UTC 2008
Time-nuts,
I have to admit that I have an interest in gravitational
anomalies.
If anybody out there has nothing better to do, here is the
stuff to spend some minutes.
In early 90's a Chinese researcher (Zhou) opened a debate
claiming to have observed anomalous behaviour on atomic
clocks during some solar eclipses (Ref 1).
On 1999 a group of German researchers published a report
claiming to have observed nothing anomalous in the comparison
of 4 atomic clocks (Nature magazine, Ref 2).
This report seems to have closed the debate among insiders.
The report is also available online at
http://www.mpq.mpg.de/~haensch/eclipse/full.html
where they kindly offer the complete data file of their
records, covering 23 days, for further insights.
I've downloaded the file and plotted their data. The plot is
uploaded at
http://xoomer.alice.it/iovane/clocks.htm
Each curve is the comparison of two atomic clocks, as
mentioned in the graph itself.
In the graph the x axis is the time in days centered on the
day of eclipse, and the y axis is the relative time delay in
nanoseconds cunulated by each couple of clocks.
You time-nuts don't need any more explanations.
My question is:
Did any of the clocks run unlocked? If any, what of them?
Thanks,
Antonio I8IOV
Ref 1:
[Zhou, S. W.; Huang, B. J., "Abnormalities of the time
comparisons of atomic clocks during the solar eclipses",
Nuovo Cimento C, vol. 15 C, no. 2, Mar.-Apr. 1992, p. 133-
137.]
Ref 2:
http://www.nature.com/nature/journal/v402/n6763/abs/402749a0.html
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