Hi When you read back the survey location do they make sense? If the antennas are X m apart on at an angle of Y, how close do the locations agree with this? Often the survey process is not adequate to ensure a good fix with this or that antenna.
Bob On Sep 13, 2014, at 5:00 PM, Peter Reilley <pe...@reilley.com> wrote: > Yes, both have completed their surveys. During the survey process > I was getting up to 150 uS of error between the PPS pulses. > > Pete. > > > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp > Sent: Saturday, September 13, 2014 4:33 PM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Correcting jitter on the 1 PPS signal from a > GPSreceiver. > > Hi > > Have they both completed a survey and does the survey make sense? > > Bob > > On Sep 13, 2014, at 10:41 AM, Peter Reilley <pe...@reilley.com> wrote: > >> I have 2 Trimble Resolution T receivers and I have compared the 1 PPS > signal >> between the 2 units. They are spec'ed at 15 nS accuracy. I am seeing >> about >> 80 nS of jitter between the two. This is with about 6 satellites in > view. >> >> I was thinking about ways to improve this. Since this is a stationary >> installation, >> can you use the jitter in the reported location (latitude and >> longitude) to correct for the 1 PPS jitter? >> >> The location data is derived using the internal GPS disciplined >> oscillator so both >> pieces of information should show the same jitter error. If you compare >> the reported >> location with the known fixed location you should be able to use that >> error to correct for the 1 PPS error. >> >> Does this make sense or am I missing something? >> >> Pete. >> >> >> _______________________________________________ >> 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. > > _______________________________________________ > 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. > > _______________________________________________ > 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. _______________________________________________ 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.