On Sat, 01 Jun 2013 13:12:52 -0700
Jim Lux <[email protected]> wrote:
> >> Or better, the 42ns PTTI conference paper by Greg Weaver at APL, who had
> >> to build them.
> >
> > That would be [2] then? A little question here: AFAIK satelites vibrate
> > a lot. How do they account/compensate for the vibrations in the oscillators?
>
> yes..
>
> Significant vibration is only during launch. And during pyro events for
> deployments, of course. After you're in orbit, the vibration is very,
> very small (bearing noise from the reaction wheels) . I doubt they're
> making measurements while they use the thrusters. If they're changing
> the orientation, it's probably using wheels. And wheel bearing noise is
> probably fairly narrow band and harmonically related to the wheel speed.
> I can ask some GRAIL-ers.
Did you get any word from them on this?
> > Is any of the design documents for those crystal oscillators available?
> > I would be very much interested to have a look at them.
>
>
> Not a chance <grin>
Damn! It nearly worked ;-)
Attila Kinali
--
The people on 4chan are like brilliant psychologists
who also happen to be insane and gross.
-- unknown
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