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RE: Re: AMSAT O-E



David,

AMSAT OSCAR-E is not to be deployed in a high orbit.  It is a LEO whose
orbit parameters will be determined by the launch, but you can assume
about 800Km height. There is NOT going to be "FM coverage to huge
areas." Operational and many design decisions are far from "concluded"
and I am soliciting inputs from everyone.

The satellite will have magnetic stabilization so it flips over every
time it crosses the equator. 

Power will be managed by limiting its transmissions to one or two
regions (about 20 minute segments) per pass.  These will be primarily
based on a geographic filter, and will also be mode dependant.

Rick
W2GPS

-----Original Message-----
From: owner-AMSAT-BB@AMSAT.Org [mailto:owner-AMSAT-BB@AMSAT.Org] On
Behalf Of G0MRF@aol.com
Sent: Tuesday, April 30, 2002 6:38 AM
To: amsat-bb@AMSAT.Org
Subject: [amsat-bb] Re: AMSAT O-E


It seems that the discussion of putting a 9 inch cube into a high orbit
and 
providing FM coverage to huge areas has been concluded, but I'm curious
about 
the 11W (28% efficiency cells etc) limitation on power.

The electrical technology going into microsats is evolving and
progressing 
but isn't it possible to take one step forward on the mechanical side
and 
have a couple of small thin/lightweight deployable panels strapped to
the 
side of the satellite at launch?

If they fail to deploy in orbit, the satellite would still have its 11W
and 
it wouldn't affect the basic mission. After all AO-40 is working very
nicely 
with it's panels still securely strapped in place. If it / they did
deploy, 
that's an extra 50% of power budget and there is nothing like a big
signal to 
attract more users / members.

BTW  Wasn't it one of last years SSTL microsat missions that was fitted
with 
a gas jet thruster for orbital manouvering?

73

David  G0MRF     www.g0mrf.freeserve.co.uk/ao-40.htm
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