Tom, Any progress on the Adafruit PPS study?
(Hope this isn't a dupe. Yahoo's mail scripts have problems today.) Bob >________________________________ > From: Tom Van Baak <t...@leapsecond.com> >To: Discussion of precise time and frequency measurement <time-nuts@febo.com> >Sent: Monday, April 28, 2014 1:56 PM >Subject: Re: [time-nuts] New timing receivers? > > >> I don't see that behavior. Looking at ~24 hours of data I have 1,024 >> unique (x,y) coordinates (as reported by the GGA sentence). The standard >> deviation of the error relative to the median (x,y) position is 1.2 meters. > >Paul, > >I agree. I have 30 days of Adafruit data; the position is never quite static, bounces around over a couple of meters as one would expect for a receiver in 3D mode. Send me email off-list for details about lat/lon/alt RMS deviation and scatter plots. > >On the other hand, I have a second "identical" Adafruit receiver with >distinctly different deviation patterns. I'm working through that mystery now. >Nothing with this hobby ever ends up being a simple quick test. > >Thanks, >/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.
