Hi
The “wiggles” he is chasing are about 2-3 Hz (by eyeball on his charts). At
2.4 GHz,
that is a fairly convenient ~1 ppb. The Z-3801 (if it was in good health)
should be easily
able to hold that level of performance. It’s not clear which MD-011 he is
using, but it is
a pretty good bet it will also hold that level as well. The usual
disclaimers about good
satellite view for the GPSDO’s would of course apply.
Substituting a typical telecom Rb for either device would likely also allow
the wiggles
to be observed (or not). That would take out the whole dependence on GPS.
(Yes I realize those comments are probably better directed to those
involved ….).
Bob
========================================
If you follow his Twitter feed:
https://twitter.com/ea4gpz
I think it's all but certain that it's the local oscillator in the
satellite-borne transponder is the cause of the problem. He's looked at an
engineering beacon on the satellite too. The orbital calculations involved
need to be quite accurate.
I thought it might interest those chasing the ultimate precision!
Probably ought to change the title of this topic, but I'm unsure of the
protocol here about so doing.
Cheers,
David
--
SatSignal Software - Quality software for you
Web: http://www.satsignal.eu
Email: david-tay...@blueyonder.co.uk
Twitter: @gm8arv
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