[time-nuts] Some GPS performance plots

John Ackermann N8UR jra at febo.com
Fri Nov 5 14:21:27 EST 2004

Tom Van Baak wrote:

> One other suggestion, it makes an interesting plot
> to show 10 or 20 minutes worth of sawtooth, not
> just 20 seconds. The point here is to observe that
> there is great variability in the "pitch" of the teeth
> of the saw. If you're lucky you can find periods when
> the sawtooth is fine, coarse, positive, negative, and
> in between like a suspension bridge, or upside down.

As Tom suggested, I've put a couple more charts up showing changes in 
the sawtooth pitch over a 1 hour period, and a view of a single phase 
flip (for lack of a better word.  I also updated the Allan Deviation 
plot since I kept the run going for about 86 hours (the original data 
was taken after about a day).



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