[time-nuts] Question about effect of spurious frequency modulation on Allan Deviation

Poul-Henning Kamp phk at phk.freebsd.dk
Mon Aug 6 10:25:50 EDT 2018


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In message <66ac003f-ff72-b2e2-ebfd-f81ab64ef2c2 at earthlink.net>, jimlux writes:

>What about doing some sort of fit to the measurement data before 
>calculating the ADEV? Similar to removing a linear ramp.
>
>basically you'd solve for the three sine parameters (f, phase, 
>amp/deviation), then remove that from the data, then run the ADEV 
>calculation.

That is incredibly shaky ground from a scientific point of view.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
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Never attribute to malice what can adequately be explained by incompetence.



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