The randomness of WWVB propagation require incredibly long measurements
to get an interesting degree of accuracy compared to a GPS driven solution.
The WWVB signal does respond nicely to solar flares if measurements are
integrated
over one minute. Check out the VLF monitoring stuff on my web
I was monitoring WWVB against a good local standard and evaluating 60kHz
'seeing' 30 years ago. Sometimes it is beautifully quiet, after a storm
front went through as I remember, at other times it's absolute hash... to
the point that the HP 117A would not even hold lock.
-John
=
As a starting point: Here's an extension of the SAQrx PC sound card receiver
that supports 192 KHz sample-rate sound cards. Enough to get you WWVB.
https://sites.google.com/site/swljo30tb
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