Author: Jerry AvinsJerry Avins
Date: Apr 30, 2007 14:17
> I read in the other thread that a good mechanical gyro will drift
> about 0.01 degree/hour and GPS can correct for this. What happens on
> say a year long (or longer) deep space mission? How do we correct the
> drift then? Also, when you land the spaceship do you keep teh gyros
> spinning? How else do you know where you are? I could see you may be
> able to point to a star but that wouldnt be accurate.
I can't give you a direct answer, but perhaps John Doty can. (Cross
posting to tap his expertise.) I know that at least some deep-space
probes lock onto known stars, Canopus among them.
Jerry
--
Engineering is the art of making what you want from things you can get.
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