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Re: an amateur satellite for $295



Actually, Echo-1 is exactly what I had in mind...

Greg  KO6TH


----Original Message Follows----
From: "i8cvs" <domenico.i8cvs@tin.it>
To: "Greg D." <ko6th_greg@hotmail.com>,"Bob Bruninga" 
<bruninga@usna.edu>,"AMSAT-BB" <amsat-bb@amsat.org>
Subject: Re: [amsat-bb] an amateur satellite for $295
Date: Sat, 22 Jul 2006 08:47:32 +0200

Hi Greg, KO6TH

Read please the following article

http://msl.jpl.nasa.gov/QuickLooks/echoQL.html

73" de

i8CVS Domenico

----- Original Message -----
From: "Greg D." <ko6th_greg@hotmail.com>
To: <bruninga@usna.edu>; <amsat-bb@amsat.org>
Sent: Saturday, July 22, 2006 5:51 AM
Subject: Re: [amsat-bb] an amateur satellite for $295


 > Actually, what about bouncing a signal off the balloon, Oscar Zero style?
 >
 > In fact, if you sent a very steady carrier at it, I bet you'd be able to
 > "hear" the golf balls inside hitting the skin, by the very tiny blips of
 > doppler caused by the skin moving.  Probably below the threshold of
 > detection... oh well.
 >
 > Greg  KO6TH
 >
 >
 > ----Original Message Follows----
 > From: "Robert Bruninga" <bruninga@usna.edu>
 > To: <amsat-bb@amsat.org>
 > Subject: Re: [amsat-bb] an amateur satellite for $295
 > Date: Fri, 21 Jul 2006 08:46:50 -0400
 >
 > Only possible COMMS method from inside to outside I can see is
 > Accoustic, to modulate the aluminized bubble skin, and then
 > Laser reflection to recover that on the ground <GRIN>...
 >
 > Or, from outside-in, use a wrap-around LCD display on the tiny package
 > that can display packet messages sent from the ground with high-
 > power transmitters.  The messages are seen on the on-board
 > camera that views the items and then to the website.... Bob
 >
 >  >>> "Tom Clark, K3IO" <K3IO@verizon.net> 07/20/06 5:44 PM >>>
 > It appears that the keep the items contained and flying loose within the
 > inflatable module(see the graphic at
 > http://www.bigelowaerospace.com/fly_stuff/items/examples.php), so you
 > must be prepared to occasionally contact somebody else's item and the
 > balloon's walls. Also, as Pieter noted, it's not clear how much solar
 > energy leaks thru the VECTRAN (http://www.vectranfiber.com/)skin if you
 > want to try some solar mini-panels for power.
 >
 > I also note that Vectran has a dielectric constant = 3.3, so when you
 > design your antennas, you need to take into account that you will be
 > executing a random walk inside a "balloon" which has a velocity factor
 > of 1/sqrt(3.3)=0.55 and an aluminized skin.
 >
 > Have fun !! -- 73, Tom
 > ----
 > Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
 > Not an AMSAT member? Join now to support the amateur satellite program!
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 > ----
 > Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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 > Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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