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Re: Geosynchronous Satellites



At 23:01 2000-12-23 -0500, sco@sco-inc.com wrote:


 >>2.) FM can only capture and retransmit one signal at a time.  In a
 >>geosynchronous orbit, that FM receiver would capture approximately half the
 >>earth.  Contrast this to the orbit of UO-14 or AO-27 where the footprint is
 >>a few thousand miles.  Look at the QRM generated in the bird just during
 >>that short path.  If you have ever talked on that bird as it moves south,
 >>then you understand the problem we have with the Mexican cabbies who use our
 >>frequencies illegally.  A geosynchronous FM bird would suffer from
 >>continuous QRM all the time.
 >
 >why not allow access to only those hams who send the correct id number at 
 >the start of every transmission?  That way cabbies calls will not be accepted.

They would not be accepted, BUT they would MIX with other sigs of about the 
same strength at the sat.



73, Bill N4XEO

E- Mail mailto: n4xeo@amsat.org
home page: http://www.qsl.net/n4xeo
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ICQ: 19219163

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