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[aprssig] Latest on UIVIEW/GO-32/D7

Robert Bruninga bruninga at usna.edu
Tue Oct 16 16:05:43 UTC 2007

The GO-32 is eath-pointing stabilized.  So it also has a hole
strraight down, so little you can do on the ground to improve
performance above say 70 degrees.  And it is there only 2% of
the time, so not worth giving up performance everywhere else to
have gain where it is not needed.

> -----Original Message-----
> THis brings up the other question about GO-32:  the "hole" 
> above about 60 degrees elevation.  How about a horizontal 
> dipole antenna oriented east/west.  Its "holes" will be on 
> the east and west horizons, where a polar-orbiter will seldom 
> be detectable.  
>> On all the "good" passes, the bird will be going 
>> through the donut, and not the hole.  
>> I wonder how an "eggbeater" antenna would work 
>> compared to the to the standard 18/19" whip?

Yes/now.  Eggbeater will have coverage in the hole, but because
it is circular polariszed, it is giving up 3 dB of performance
everywhere else...

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