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Re: The Olympics




In fact, satellite telescopes are not slewed to their target by spinning an
internal body the opposite way. Most satellites achieve attitude control
with gyroscopic reference systems. Three mutually orthogonal gyroscopes are
used to define an inertial reference frame. Torquing motors are then used to
rotate the satellite with respect to this frame. The gyro reference frame is
maintained against the stars.


Howdy,

1: What keeps the "gyros" pointing in the same direction? The fact
is that they are "disconnected" from the satellite itself so that not
external torques can be applied to them and are used only to measure
a RELATIVE angular position. They really have nothing to do with
changing the orientation of the satellite.

2: Aren't the "torquing motors" internal "objects" that are rotating
against the rest of the satellite?

I see nothing in this comment that disagrees with what I said before.
maybe I'm missing something.

Good Luck,
--
Herb Schulz
(herbs@interaccess.com)