[time-nuts] Measuring short term stability minus linear drift

[Jim Lux]

On 10/7/11 9:32 PM, Rick Karlquist wrote:
> I want to measure the short term stability of a source
> with substantial linear drift.  I would like some measure
> of stability along the lines of Allan deviation, but I
> only want to measure the "noise" and ignore the "drift".
> AFAIK, ADEV treats linear drift like a form of noise.
> Has this problem been solved before?
> Any ideas?
>

what if you (least squares?) fit a straight line to the frequency 
measurement data, remove that, then look at ADEV?  We do something 
similar with testing deep space transponders which will be handling a 
signal with varying Doppler so our test signal is varying in frequency.