[amsat-bb] Re: Turn off AGC when receiving BPSK-1000

Trevor . m5aka at yahoo.co.uk
Thu Aug 18 05:09:29 PDT 2011

--- On Thu, 18/8/11, Phil Karn <karn at philkarn.net> wrote:
> For attitude control, I think control moment gyros are the
> way to go. (They're somewhat different from momentum wheels 
> in that they operate at constant speed.) This is largely a 
> mechanical problem: designing flywheels and motors that are small, 
> lightweight, can store a lot of angular momentum, draw minimal power, 
> and be precisely moved around to control the direction and magnitude 
> of the overall spacecraft angular momentum vector. We'd still need 
> magnetorquing coils to dump excess momentum, but the cm gyros would 
> provide quick and accurate control of spacecraft attitude.

There is discussion of the means of stabilsation and the use of 2.4 and 5 GHz on a future satellite in the Positioning and Experiments sections of the Forum at http://tinyurl.com/RadioSkaf 

73 Trevor M5AKA

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