[R-390] WWV Time

george stringe egnirts at comcast.net
Thu Dec 4 15:42:04 EST 2008


With all due respects guys, and I appreciate your input but this really 
was not an exercise in how to best measure frequency.  Even if I am only 
40 miles from the WWV transmitter, I realize it is not perfect, it was 
just an exercise for all those who have professed a love for the slide 
rule....and as such, the responses are slim so far ;-)  If I am 5 Hz off 
in 2.5 million, my calculator says that is .000002 percent.  That can't 
be correct can it?

george
WG0S



Gord Hayward wrote:
>> Using WWV to ascertain the generator accuracy percentage is VERY 
>> problematic.
>
>
> It is - the path length is important for absolute time, then there's 
> the variance of the reflection height.
> That gives a variable path length as well as a Doppler shift with the 
> motion.  WWVB is better.
> Cheers, Gord.
>


More information about the R-390 mailing list