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RE: Re: [ATNA] More thoughts about HAM TV from space

Further info also at


With regard to ATV in general I can see the merit in the comments earlier on 
adopting internet standards for Amateur ATV use, both terrestrial and 

Certainly low res video and audio is do-able with a 56 kbps data stream 
although clearly higher data rates would be better and this could be done 
with a fraction of the bandwidth FM ATV uses.

73 Trevor M5AKA
Subject: RE: [amsat-bb] Re: [ATNA] More thoughts about HAM TV from space
Date: Sat, 31 Dec 2005 10:49:49 +0000

Bob, I presume your project is independant of the 1.2 to 2.4 GHz ISS Digital
ATV Repeater which was covered at the 2004 AMSAT-UK Colloquium ?



As you may be aware AMSAT-UK made a significant donation to enable the
installation of 1.2 and 2.4 GHz antennas in the Columbus module, see


Donations list

73 Trevor M5AKA

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>From: "Robert Bruninga" <bruninga@usna.edu>
>To: <amsat-bb@amsat.org>
>Subject: [amsat-bb] Re: [ATNA] More thoughts about HAM TV from space
>Date: Fri, 30 Dec 2005 16:33:27 -0500
>OOPS... Big change in the original ATV satellite premise:
>The opportunity I am working on is on the ISS, so
>we cannot TX on 70 cm since that will probably be
>the main uplink band for all the other ham stuff
>on board.  SO I guess that means it will need to
>be 2.4 GHz downlink.
>THus, all it takes to receive it is a standard MDS
>downconverter which plugs directly into a TV
>set.  OK, lets study that approach.  Do the link
>calculations and lets see how much TX power
>(to an omni) is needed for receiving on a 2' dish.
>de Wb4APR, Bob
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