[time-nuts] Allan Variance

[Magnus Danielson]

On 09/29/2010 06:18 PM, Martyn Smith wrote:
> Hello,
>
> Can anyone recommend software to calulate the Allan varaince from a set
> of data?
>
> I have taken many measurements with the SR620 using it's 500 second gate
> and downloaded the results into Excel.
>
> I can use the SR620 itself to calulate the Allan Variance. However, I
> want to know the Allan Varaince over a 10000 second sample instead of
> 500 seconds.
>
> Hoping to plug the data into software and get the result!!

John Miles has written some nice software.

http://www.thegleam.com/ke5fx/timelab/readme.htm

It is intended to do the measurement direct, so the measurement log 
becomes in the right format.

Cheers,
Magnus