[time-nuts] WWV / WWVH / WWVB

[Robert Vassar]

On Nov 20, 2008, at 4:27 PM, Hal Murray wrote:

>
>
> ntpd has a refclock driver for WWV/H.  I've never played with it.
>   http://www.eecis.udel.edu/~mills/ntp/html/drivers/driver36.html
>>


I played with it back in the 90's, I hooked up the audio line out  
from my Yaesu FT-840 to a SPARCstation 20.  It does in fact work.   
But as I remember it consumed pretty much 100% of a 75Mhz SuperSPARC- 
II CPU.  I'm sure a modern CPU would do a much better job.


Keep in mind the F/F1/F2 layer that the HF signals use to propagate  
tends to move around a bit.  This introduces a variable propagation  
delay that cannot be entirely corrected.


Rob