A Stability Analysis and Display ToolI've put together a first attempt at a perl program called stable-stats.pl which will read a file containing timetag/phase pairs and generate useful statistics such as drift, offset, and Allan Variance. It will generate a web page containing those statistics, as well as charts of accumulated phase and Allan variance. You can see some real-world examples of what it an do at www.febo.com/pages/plots/chronos/.
stable-stats.pl was developed under, and primarily for use with, Linux. It should work with any other Unix flavor for which the Grace program is available. There's no reason the perl code wouldn't work on a Windows system with perl installed, but I'm not sure if there is a version of Grace for Windows that will work properly.
This is currently a version 0.9x release, so if you try it, please let me know if you have any problems, suggestions, or bug fixes. In particular, please scrutinize the calculation routines as there are plenty of opportunities for off-by-one and other indexing problems, as well as who knows what other kinds of mistakes.