> Averaging time is unfortunate in several aspects, part for it not being > averaging being done and part for the fact that averaging is a separate > processing step that can be done, and you can make a plot orthogonal to > the ADEV plot with various degrees of averaging-pre-filter.
I agree. > The MDEV uses a tau averaging for a tau observation time. > > The tau is really the observation time, and ADEV is the frequency > stability for that observation time, that is the ROMS relative frequency > noise when observing it tau seconds later. Similarly the TDEV is the > time stability in RMS s for the observation time tau. The phrase "observation time" is probably no better than "averaging time" for the x-axis label; they both give the impression of elapsed time to newcomers. Both "observation" and "averaging" connote run time or elapsed time or experiment duration. I would stay away from the word "time" on the ADEV x-axis completely. Using the word "interval" (as in "sampling interval") is good; the least likely to be confused with elapsed time. Also, it's always nice to add "tau" to the axis label since that letter is universally associated with sampling in T&F metrology. Stable32 uses "Averaging Time, tau, Seconds". TimeLab avoids the issue by not having labels. /tvb _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
