[time-nuts] GPS message jitter (preliminary results)

Mark Sims 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. 		 	   		  

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