[amsat-bb] Re: DO-64

Luc Leblanc lucleblanc6 at videotron.ca
Sat Sep 13 09:03:35 PDT 2008

On 13 Sep 2008 at 8:15, WILLIAMS MICHAEL wrote:

> As usual, the downlink signal gets weak on the second half of the pass. 
> Mike Williams K9QHO

Got the same results here i got explanations regarding this signal drop for polarisation change but as the satellite attitude is 
uncontrolled i tend to believe it's more an effect of the antennas pointing towards the earth station and pointing away than a polarisation 
issue. This change in the signal level start exactly pass the TCA point and signal degrade up to a point he's drop below the noise?

I try to figure out the satellite shape spinning and thumbing in space in regard of the polarisation and it will be very odd that the 
polarisation change happen just at TCA?

Any ideas here?


Luc Leblanc VE2DWE
Skype VE2DWE


More information about the AMSAT-BB mailing list