[time-nuts] Correcting jitter on the 1 PPS signal from a GPSreceiver.
peter at reilley.com
Sat Sep 13 17:00:12 EDT 2014
Yes, both have completed their surveys. During the survey process
I was getting up to 150 uS of error between the PPS pulses.
From: time-nuts [mailto:time-nuts-bounces at 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
Have they both completed a survey and does the survey make sense?
On Sep 13, 2014, at 10:41 AM, Peter Reilley <peter at reilley.com> wrote:
> I have 2 Trimble Resolution T receivers and I have compared the 1 PPS
> between the 2 units. They are spec'ed at 15 nS accuracy. I am seeing
> 80 nS of jitter between the two. This is with about 6 satellites in
> I was thinking about ways to improve this. Since this is a stationary
> 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?
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