I've done the math subtracting both skips and my clock bias's and frequency
drifts from sirf msg30 (prn30) that were posted on timenuts earlier this week;
1.3331348485e-006 3.6930953087e-012 my data
1.3294251003e-006 3.6977287551e-012 skips
.0037097482e-006 -.0046334464e-012
https://www.febo.com/pages/gps_pps/
It appears the implementation of the sawtooth error correction
severely degrades the performance of the system. There could be many
reasons, which is why it is important to nail down as many of the
error sources as possible.
severely degrades??
Tom and Bob,
It is not obvious to me that it is easier to simply apply a correction in
nS increments
with a range as wide as 100nS. How is this done? Using switched delay lines
or delay gates?
Didier,
If you intend to measure the 1PPS there is no need to correct or adjust it
prior to
Hi,
Agree. If you steer so you keep to be off frequency so you have plenty
of sawtooth you get better resolution. I've been pondering about maybe
write an article to illustrate the effect.
Cheers,
Magnus
On 04/03/14 23:45, Bob Camp wrote:
Hi
Be careful of what you wish for.
One way to
Hi,
You still get hanging bridges, but smaller in amplitude and for the same
oscillator stability much more short-lived.
Cheers,
Magnus
On 06/03/14 00:03, Bob Camp wrote:
Hi
If you are going to decode and use the sawtooth data out of the receiver,
there’s no need to eliminate the hanging
Hi
In modern GPS modules the sawtooth error is no longer truncated at the 1 ns
level. The have been giving you far more resolution than that for 10 years now.
The resolution is not just useless bits. If you compare the result to a cesium
standard they do improve the GPS.
Bob
On Mar 6, 2014,
To the Mike that posted:
http://www.pst.netii.net/patents.htm - I tried going to your site - can't
reach it. Is the site operational? I wanted to take a look at your
patents.
Thanks,
John Westmoreland
On Thu, Mar 6, 2014 at 2:40 PM, Bob Camp li...@rtty.us wrote:
Hi
In modern GPS
To the Mike that posted:
http://www.pst.netii.net/patents.htm - I tried going to your site - can't
reach it. Is the site operational? I wanted to take a look at your
patents.
Thanks,
John Westmoreland
==
Jon,
It's working OK from Edinburgh at 07:08 UTC.
