[amsat-bb] Polarization for ISS and Weather Satellites

Graham Dillabough gdillabough at nf.sympatico.ca
Sat Oct 27 13:58:07 PDT 2012

I haven't posted here in a very long time.  I hope this works.

I am building two Quadrifilar Helix antennas (from QST, August 1996); 
one for weather satellite experimentation, and one as a backup 
antenna for an upcoming ARISS contact.

I haven't found anything in the ARRL antenna book, or on the web, 
that specifically says that one mode (RHCP or LHCP) of circular 
polarization is better than the other for either of the two 
applications noted above.

Any insight or experience with polarization issues with the ISS and 
weather satellites are appreciated.  The last time I did an ARISS 
contact, I was plagued with very deep fades, and want to do better this time.


Graham Dillabough, VE6KJ, VO1DZA

Albert Einstein, when asked to describe radio, replied:

"You see, wire telegraph is a kind of a very, very long cat. You pull his
tail in New York and his head is meowing in Los Angeles. Do you understand
this? And radio operates exactly the same way: you send signals here, they
receive them there. The only difference is that there is no cat."
Albert Einstein (1879-1955) 

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