[amsat-bb] Re: Question about tuning for doppler and SatPC32

Luc Leblanc VE2DWE lucleblanc6 at videotron.ca
Fri Nov 17 08:22:30 PST 2006

On 17 Nov 2006 at 8:52, pgayle at porchlight.ca wrote:

> Hello all.
> I was on one of the early apsses of FO-29 this morning and was
> having a QSO with another ham about which frequency to tune
> for doppler. Both of us went LOS without comming to a mutual
> agreement on this.
> This question has been asked before, I'm sure, but I thought
> that I would ask it again.
Exactly and at numerous time but there was no consensus or agreement on that 
matter. Even if you tune both the uplink and the downlink automatically you 
ended up with some manual correction at some point in the pass and you should 
have your other party correcting both ways also and all the other users on the 
transponder (read nearly impossible to achieve).

What i found  here is to try to tune the downlink only don't touch  your uplink 
 at all.   I know it's not perfect  but it is manageable and even if again we 
can not expect all of us to use the same method it is a lesser problem then 
trying to run after each other .     

Again it is what i found to be my best way to compensate for doppler shifting 
but when you enter  into a QSO with a station who track both side it is a mess 
and i was rarely able to complete a QSO as i loose it on the transponder. Let 
say there is some very bad  combination  .   


The medium is the message...The content is the audience...;)

Luc Leblanc VE2DWE
WAC basic,CW,Phone,Satellite
Skype VE2DWE

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