[time-nuts] GPS message jitter (preliminary results)
holrum at hotmail.com
Mon Jul 18 16:49:47 EDT 2016
Most definitely... if I turn on Lady Hather's display filter (which does a sliding average of "n" readings) the standard deviation and jitter values drop dramatically. With a 60 second filter the deviation was down to around .15 msecs and the peak-peak jitter below a millisecond. Average and rms values of the jitter was 2.4 microseconds. I saw similar improvements with the cheap NMEA receivers.
> Looking at the data by eyeball (maybe not the best way): A 10 to 30 sample finite impulse average (boxcar) would do a lot for the result.
More information about the time-nuts