[time-nuts] Allan Deviation Tool

John Ackermann N8UR jra at febo.com
Wed Mar 15 20:55:02 EST 2006


Very nice, Tom.  Thanks!

John
----

Tom Van Baak said the following on 03/15/2006 08:12 PM:
> Someone asked a few weeks ago about a tool to
> compute Allan deviation. There are quite a few that
> I use, but here's a write-up about a simple windows
> command line tool that I use.
> 
> http://www.leapsecond.com/tools/adev1.htm
> 
> With one day's worth of data from a cesium standard
> and an HP 53131A the tool does this for you:
> 
> C:\tvb> adev1 < log23202.txt 1
> ** Sampling period: 1 s
> ** Phase data scale factor: 1.000e+000
> ** Total phase samples: 86400
>        1 tau, 6.0265e-010 adev(n=86398),
>        2 tau, 2.8217e-010 adev(n=43198),
>        5 tau, 1.0314e-010 adev(n=17278),
>       10 tau, 5.3691e-011 adev(n=8638),
>       20 tau, 2.6617e-011 adev(n=4318),
>       50 tau, 1.1052e-011 adev(n=1726),
>      100 tau, 5.6781e-012 adev(n=862),
>      200 tau, 3.0238e-012 adev(n=430),
>      500 tau, 1.3804e-012 adev(n=171),
>     1000 tau, 8.0011e-013 adev(n=85),
>     2000 tau, 6.0141e-013 adev(n=42),
>     5000 tau, 2.3656e-013 adev(n=16),
>    10000 tau, 1.4069e-013 adev(n=7),
>    20000 tau, 8.3392e-014 adev(n=3),
> 
> If you have questions or trouble with it contact me off-list.
> 
> /tvb
> http://www.leapsecond.com/time-nuts.htm
> 
> 
> 
> 
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