[time-nuts] Modified Allan Deviation and counter averaging

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Aug 2 19:07:53 EDT 2015


--------
In message <55BDB002.8060408 at rubidium.dyndns.org>, Magnus Danielson writes:

>For true white PM *random* noise you can move your phase samples around, 
>but you gain nothing by bursting them.

I gain nothing mathematically, but in practical terms it would be
a lot more manageable to record an average of 1000 measurements
once per second, than 1000 measurements every second.

>For any other form of random 
>noise and for the systematic noise, you alter the total filtering 
>behavior [...]

Agreed.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.


More information about the time-nuts mailing list