[LinuxPPS] interpreting the allan deviation graph of the ntp loopstats-file

[Udo van den Heuvel]

Folkert van Heusden wrote:
>>> But: now what? What do these graphs tell me?
>> http://en.wikipedia.org/wiki/Allan_variance
> 
> Yes, they measure the stability of a clock. But how? What does that line
> in my graphs tell me? Bad clock? Good clock? Degrading clock?

A low Allan variance is a characteristic of a clock with good stability 
over the measured period.

(did you see that?)