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Re: an amateur satellite for $295



In other words, they ARE just launching more space junk..............

Sheesh!!!


George, KA3HSW


-----Original Message-----
>From: Robert McGwier <rwmcgwier@comcast.net>
>Sent: Jul 21, 2006 8:33 AM
>To: Robert Bruninga <bruninga@usna.edu>
>Cc: amsat-bb@amsat.org
>Subject: Re: [amsat-bb] an amateur satellite for $295
>
>Baaaaa.   Did you look at the videos?   They let the "your items" float 
>free INSIDE the spacecraft in Genesis I.    It would not do much good to 
>have our golf ball inside a Faraday cage so I suspect that Genesis II is 
>the same.
>
>73's
>Bob
>N4HY
>
>
>Robert Bruninga wrote:
>> 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
>>
>>   
>
>
>-- 
>AMSAT VP Engineering. Member: ARRL, AMSAT-DL, TAPR, Packrats,
>NJQRP/AMQRP, QRP ARCI, QCWA, FRC. ARRL SDR Wrk Grp Chairman
>"An expert is a man who has made all the mistakes which can be
>made in a very narrow field."  Niels Bohr
>----
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