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Re: Feasibility of VO-52 and FO-29 crosslink...



Agreed.

It has been done however on some of the older sats. In fact several of us 
heard AO-7 thumping it's CW beacon in the background of UO-14s uplink before 
anyone realized it was back from the dead.

73, Drew KO4MA

----- Original Message ----- 
From: "Patrick Green" <pagreen@gmail.com>
To: "Dave hartzell" <hartzell@gmail.com>
Cc: <amsat-bb@amsat.org>
Sent: Tuesday, March 14, 2006 8:38 PM
Subject: Re: [amsat-bb] Feasibility of VO-52 and FO-29 crosslink...


> They would have to be close together.  The problem is the antenna
> systems on the sats are weak and work poorly to each other.  We use
> beams most of the time to hear the sats.
>
> 73 de Pat --- KA9SCF.
> Amsat #35741
>
> On 3/12/06, Dave hartzell <hartzell@gmail.com> wrote:
>> Hello,
>>
>> Today I noticed that there is overlap in the transponder allocations
>> of FO-29 and VO-52:
>>
>> 435.240 (up) --> VO-52 --> 145.910 (cross) --> FO-29 --> 435.890 (down)
>>
>> What would be the feasibility of performing a cross-link in this
>> manner?  Off the top of my head, I can think of a few problems...
>>
>> * Doppler issues
>> * Antenna alignment and polarization issues
>> * Orbital alignment
>> * Modulation issues:  USB vs. LSB vs. CW
>>
>> I think this would be a neat experiment, if possible.  Perhaps a
>> trial-run might simply be listening for a spacecraft's beacon via
>> another transponder?
>>
>> Just curious is anyone has attempted this...
>>
>> 73,
>>
>> Dave
>> N0TGD
>> ----
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> ----
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----
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