[time-nuts] Common sky pps errors for any GPSDOs?
SAIDJACK at aol.com
SAIDJACK at aol.com
Mon Jan 5 21:58:55 UTC 2009
Hi Matt,
on Fury we typically see the 1PPS aligned to within +/-25ns or so without
calibration when two units use the same antenna feed.
There is a good paper on the M12+ receiver's accuracy from Synergy/NIST,
they tested five receivers against UTC (at UTC!!). They came up with a baseline
error of 2ns over 3 weeks when the units are calibrated.
You can find the paper on our website:
_http://www.jackson-labs.com/docs/Motorola_M12.pdf_
(http://www.jackson-labs.com/docs/Motorola_M12.pdf)
We did not do tests over longer baselines yet.
bye,
Said
In a message dated 1/5/2009 11:32:06 Pacific Standard Time,
boyscout at gmail.com writes:
The other concern, of course, is that even if both units were very
close, they will be exposed to slightly different environmental
conditions (different A/C settings, different cycling times, etc.).
Are there any good papers discussing this subject? Any data out there?
Said -- have you measured this sort of thing on the Fury?
Thanks,
Matt
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