[amsat-bb] Re: Can we get them to fix AO-40 first then?

Bob- W7LRD w7lrd at comcast.net
Thu Oct 15 15:22:35 PDT 2009

I am pleasantly amused by the interest  in all probability of a dead bird.  Can you imagine the explosion in interest and excitement on this bb if it ever came back.  It would be nice but we  can only  play with L/S modes on the occasional AO-51. 

73 Bob W7LRD 

----- Original Message ----- 
From: "Peter Guelzow" <peter.guelzow at kourou.de> 
To: "Rocky Jones" <orbitjet at hotmail.com> 
Cc: "Amsat BB" <amsat-bb at amsat.org>, "samudra haque" <samudra.haque at gmail.com> 
Sent: Thursday, October 15, 2009 2:30:03 PM GMT -08:00 US/Canada Pacific 
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then? 

Hi Robert, 

that's indeed the big question...   We do not know in which attitude the 
spacecraft is..  is it still spinning very slowly or tumbling?  What is 
the Solar-ß-Angel? 
If the S/C has a good orientation to the sun and the battery opens, than 
there should be enough power to operate the IHU and Beacon etc... do 
some magnetorquing to improve attitude. 
Something like this was done when AO-10 was hit by the last rocket 
stage, spinning the wrong direction with sun directly on top and almost 
no power... 
Unfolding the solar panels would give very high power only when they are 
oriented towards the sun.  With folded solar arrays, all panels around 
the satellite can still see the sun around it's spin axis. 
Only when it shines on top or bottom, we will have problems... 

73s Peter 

Rocky Jones wrote: 
> Peter. 
> In the current configuration (or the last known config) of the vehicle 
> does the vehicle have sufficient solar illumination to "spin" and 
> maintain the DC busses without a battery? 
> Robert WB5MZO 
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> Hotmail: Powerful Free email with security by Microsoft. Get it now. 
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