[time-nuts] ADEV ScaleFactor correction

Tom Van Baak tvb at LeapSecond.com
Thu Jan 16 04:05:37 EST 2014


> The 1.4 scale factor correction worked

Nice confirmation.

The actual number is sqrt(2). Look at the definition of ADEV (http://tf.nist.gov/images/adevfreq.gif) to see why.

Note sqrt(2) = 1.414 and 1/sqrt(7) is 0.707. The rule-of-thumb is that ADEV(tau 1 day) is 0.707 the daily drift rate; which is to say the daily drift rate is 1.414 ADEV(tau 1 day).

/tvb



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