[time-nuts] WWV and legal issues

[Attila Kinali]

On Thu, 30 Aug 2018 12:27:12 -0400
Bob kb8tq <kb8tq at n1k.org> wrote:

> WWVB as transmitted ( = right at the input to the antenna) is a wonderfully stable signal. As soon as
> that signal hits the real world things start to degrade. Propagation between transmit and receive sites
> is a big deal, even at 60 KHz. On top of that, there is a *lot* of manmade noise at 60 KHz. The receive 
> signal to noise will never be as good as you might like it to be ….

I don't know about WWVB, but for DCF77 it's known that sunrise/sunset
causes a phase shift of several 100µs at even moderate distances
(like ~500km). Unfortunately I don't have any measurements at hand.


				Attila Kinali

-- 
It is upon moral qualities that a society is ultimately founded. All 
the prosperity and technological sophistication in the world is of no 
use without that foundation.
                 -- Miss Matheson, The Diamond Age, Neal Stephenson