[time-nuts] Allan Deviation recipe?

Bob Stewart bob at evoria.net
Tue Jul 19 15:04:16 EDT 2016

I don't know what your data looks like of course, but to me it looks like you have a scaling problem.  At the very least, I would think you should be in the xE-9 at tau = 1 second.  Are you feeding it whole numbers of nanoseconds, but it's interpreting them as milliseconds or something like that?



      From: Gary E. Miller <gem at rellim.com>
 To: Tom Van Baak <tvb at LeapSecond.com> 
Cc: Discussion of precise time and frequency measurement <time-nuts at febo.com>
 Sent: Tuesday, July 19, 2016 1:42 PM
 Subject: Re: [time-nuts] Allan Deviation recipe?
Yo All!

With help from Tom Van Baak and Bob Stewart, I have 6 weeks worth of
GPS Serial and PPS timing data in a nice ADEV chart.  I think.

Check it out:

That is for a SiRF III (MR-350P) with a bad sky view.

How does that look?  Totally wrong?  Somewhat wrong?

Once I get this packaged up I'll have lots more similar graphs.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
    gem at rellim.com  Tel:+1 541 382 8588
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