[amsat-bb] Re: 'Zombie-sat' and the clever orbital dance

[Auke de Jong]

If Galaxy 15's transponders are all of opposite polarities, then wouldn't 
the potential interference be cancelled-out by around -60dB due to the 
polarisation mis-match on both the uplink and downlink paths?

Auke
----- Original Message ----- 
>> From: wejones at eskerridge.com
>> To: amsat-bb at amsat.org
>> Date: Wed, 26 May 2010 09:35:54 -0400
>> Subject: [amsat-bb] Re: 'Zombie-sat' and the clever orbital dance
>>
>>
>>
>> On 25 May 2010 at 19:36, Greg D. wrote:
>>
>> >
>> > I wonder...  Has anyone at SES considered just turning off their 
>> > transmitter,
>> > while Galaxy-15 crosses their path, and using it instead?
>> >
>>
>> G-15 and AMC-11 are opposite polarity, and most of the AMC-11 
>> transponders are
>> pretty wide, and the main carrier freq of each transponder is right at 
>> the null
>> between the transponders on G-15.  It should work on narrow signals that 
>> don't
>> have carriers at the nulls, but I don't think it would work for most of 
>> the wide
>> transponders.
>>
>>
>>
>>
>>
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