[Elecraft] Question re: WWV fqy

[Don Wilhelm]

Dave,

The signal starts out good to 10EXP (-13). That is much better than 0.1ppm.

There will be inaccuracies due to propagation - see 
http://www.febo.com/pages/hf_stability/ for one analysis.  The author of 
that page suggests that an allowance of about 0.5 Hz is reasonable, and 
based on that the received accuracy of 10 MHz WWV would be 0.05 ppm if 
my math is right.

73,
Don W3FPR

On 8/21/2012 3:15 PM, Dave KK7SS wrote:
> Please settle a debate among friends..
> How accurate are the WWV 5, 10 and 20 Mhz frequencies?
>
>   
> I'm saying 0.1ppm, my friend says 1.0 ppm.
>
> Looking on the NIST page I get lots of info about time accuracy.
> Couldn't find the info on frequency accuracy.
> A link, if possible, would be nice.
>