[time-nuts] New frequency stability measure

Robert Lutwak rlutwak at comcast.net
Wed Dec 27 18:27:13 EST 2006

(Shameless plug for my friend Bill Riley and his awesome Stable32 software)

Both TheoH and Theo1 have been easily available in the last few upgrades of 
Stable32.  I believe Bill Riley was coauthor on  some of the early papers 
with David Howe of NIST.

Like all stability predictors, use Theo with care.  In particular, it can 
provide a deceptively optimistic prediction of stability if you have a 
perturbation on a timescale that's comparable to your longest tau.


Robert Lutwak
Symmetricom - Technology Realization Center
RLutwak at Symmetricom.com        (Business)
Lutwak at Alum.mit.edu                   (Personal)
(978) 232-1461                              (Desk)
(339) 927-7896                              (Mobile)
(978) 927-4099                              (Facsimile)

----- Original Message ----- 
From: "Dr Bruce Griffiths" <bruce.griffiths at xtra.co.nz>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Wednesday, December 27, 2006 6:06 PM
Subject: [time-nuts] New frequency stability measure

> Has anyone used the new frequency stability measure reported in
> http://www.tf.nist.gov/timefreq/general/pdf/2109.pdf
> It allows somewhat quicker determination of long term frequency
> stability characteristics than using the Allan variance or its 
> derivatives.
> Bruce
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> time-nuts at febo.com
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