Martyn Smith wrote:
Hello,
The answer to my original question is that Allan Variance is not to be
used
but rather Allan deviation.
However, David Allan does not mention Allan Deviation on his website,
only
Allan Variance.
The distinction is obvious to anyone with sufficient exposure to
statistics theory.
Also I spoke to the designer of the PRS10 and he definitely said his
specs are
Allan Variance.
If that were literally correct the PRS10 would be too noisy for use as a
local clock in VLBI.
Whereas in fact as long as the other antena(e) use hydrogen maser(s), a
PRS10 suffices at least for short (~15minute) integrations for signals
in the waterhole region.
Also I looked at Wenzel and they only quote Allan Variance.
Also NIST quote Allan variance and the list goes on.
So I'm still confused, as it seems is everyone else.
HP/Agilent correctly label the frequency stability measures quoted in
datasheets originating in the 1970's.
Regards
Steve
Bruce
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
