"philnyc" wrote in message
oups.com...
Hello everyone,

I would greatly appreciate any advice in subject of choosing a vertical
antenna for satellite operations. I can hear VO-52 / FO-29 5-7 / 5-9
using my mobile antenna NR 770 H fix on a mast 9ft above the ground.

I am cosidering builing a Super J-Pole antenna.
http://www.n7qvc.com/amateur_radio/copper.html

Do you think that this vertical will be sufficient to bounce 50W of
signal back to Earth of the satellite ? If not , what other homebrew
antenna will be fine for this purpose ?

Thank you for your helpful response .

Phil

Phil

I've been trying to figure out how to build an antenna for receiving polar
orbiting weather satellite signals. The satellites send down RHCP on 137
MHz.
A turnstile antenna works pretty well for satellite monitoring, and is
pretty easy to build.
There are helical configurations that are commonly considered to be the
ultimate weather satellite receiving antenna, but can be tricky to make work
properly..
I submit that I know a way to build an antenna with 4 dipoles that perform
as well as (or better than) a helix for satellite reception. I refer to
the hemispherical patterned antenna concept as the "Cross". It is simple
and wouldnt qualify as an invention, its a concept, and it works. It is
alot easier for me to build one than it is to describe it. But, the cross
antenna is two pairs of crossed dipoles. Each pair is two crossed dipoles
spaced apart and fed in phase. One pair is fed 90 degrees later than the
other.

I'd be "only too pleased" to E-mail notes and performance data on the
concept if you have interest.
I can produce good images from NOAA 17 whenever it is above 1 degree ( 2
degrees would be a safer number) above the horizon, viewing it from horizon
to horizon with that stationary, 4 dipole array.

Jerry