[amsat-bb] Re: Path to HEO

[Bob- W7LRD]

more outside the box thinking...you have a gun (of sorts) on the satellite. Then fire to the rear forcing the little satellite faster in the opposite direction. We could select from .22LR to 45 ACP. I realize the anti gun folks would go bizerk. Back in my corner now. 
73 Bob 
w7LRD 

----- Original Message -----
From: g0mrf at aol.com 
To: nss at mwt.net, glasbrenner at mindspring.com, amsat-bb at amsat.org 
Sent: Tuesday, April 30, 2013 1:35:08 PM 
Subject: [amsat-bb] Re: Path to HEO 

Hi all. 

Deployable gain antennas are possible, but unfortunately attitude 
control is a real issue. If the orbit has a high perigee then the 
magnetic field for magnetorquing is minimal. With limited fuel and 
little or no magnetic field, keeping the antennas pointing correctly is 
difficult. Also, all of this getting to HEO is challenging given our 
lack of experience with low mass / ion propulsion. 
A compromise could be 4 Watts (ish) from MEO. That can be done with 
omnidirectional antennas, so when the batteries die and the fuel is 
exhausted we still have a useful satellite even if we cannot control 
attitude. 

Would be great to team up with a group who want to test a propulsion 
system and apply for a launch opportunity. 

Thanks 

David 

Here's an oldie but goodie..... http://www.g0mrf.com/MEOSAT.htm 




-----Original Message----- 
From: Joe <nss at mwt.net> 
To: amsat-bb <amsat-bb at amsat.org> 
Sent: Tue, 30 Apr 2013 17:18 
Subject: [amsat-bb] Re: Path to HEO 


On the Outside? :-) 

just like 90% of the earlier birds they are rolled or folded up until 
after deployment. IIRC: one of the first actually did use a rolled up 
tame measure for the elements. 

Joe WB9SBD 
Sig 
The Original Rolling Ball Clock 
Idle Tyme 
Idle-Tyme.com 
http://www.idle-tyme.com 
On 4/30/2013 9:51 AM, Andrew Glasbrenner wrote: 
> Where do the gain antennas go on a 10x10x30cm HEO? 
> 
> 73, Drew KO4MA 
> 
> Sent from my iPhone 
> 
> On Apr 30, 2013, at 9:01 AM, N0JY <n0jy at lavabit.com> wrote: 
> 
>> I wonder about the amount of time spent in the Van Allen belts on 
the way up 
there. We're concerned about radiation at a 650 km orbit, it might 
take some 
heavy duty ($$) radiation tolerant components to survive a few years 
trip 
through the radiation belts as well as the final high orbit? 
>> 
>> Jerry 
>> N0JY 
>> 
>> 
>> 
>> _______________________________________________ 
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