On 11/13/2009 07:15 PM, Don Latham wrote:
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.
Don
My own nuttiness started with that, and the innocent question "How much?
What does it take to measure it? What do I need to build?"
http://n1.taur.dk/dcf/ (raw data and plots, time is UTC+1)
I am no more than 6-700 km north of DCF77, and get ~5us p-p. Now that is
quite large, when I started out that number seemed a lot smaller.
/Kasper Pedersen
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