[time-nuts] Reference oscillator accuracy

Hal Murray hmurray at megapathdsl.net
Fri Nov 13 18:30:51 UTC 2009


> The ground wave path of WWVB varies due to a very small changes in the
> index of refraction (temperature and absolute humidity) over the path.
> It is not much, but is measurable. 

How much is "not much"?  Say over a 1000 km path.  Are we talking 
microseconds or picoseconds?


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