I used to rx wx images off of the sat. USed a pair of crossed dipoles with a
reflector. Put it up on a pole high enough to clear the trees and you can
recive the sat from nearly horizon to horizon.
"Thierry" - wrote in message ...
Hi,

To pick up a 137 MHz signal from wx satellite (POES), are the discone and
quadrifilar helix antennas similar, I mean, they are different in design
but
for the rest ?
Are they both omnidirectional and are they both able to change
automatically
the elevation and azimuth to the satellite direction without interruption
and without requiring a rotator ? or only the helix provides this
capability
?

Thanks in advance

Thierry, ON4SKY
http://www.astrosurf.com/lombry