01, August ,2006
Hi All,
This a short story about using green GOES (GOES-WEST water vapor
satellite imagery) on 10 and 24 GHz this morning. When I got up this
morning and looked out of the window and saw cirrus clouds I checked
the weather Web site. The picture below shows that there was
a green GOES. The color green represent a temperature around
-40 degrees C. This is required for use as a reflector as we have
found from running many tests.
In the picture below KD7TS and I are running
dual bands tests on 10
and 24 GHz using
small dishes and low power. The dishes are at zero degree elevation.
The Picture shows shows Mike's 10 and 24 signals. The 10 GHz signal
is on the left and the 24 Ghz is on the right. Signal are running a
little
bit above normal.
At 1500z I had a schedule with W7SZ on 10 GHz.
The only way
I can work Larry is by green GOES because of intervening high terrain.
My dish is pointed up at 8.5 degrees and Larry's dish is at 3.5 degrees
for a common volume of 25,265 feet. The picture below shows
Larry's signal sending * and D in PUA43 mode. We all use horizontal
polarization here. I did rotate the feed to vertical polarization and
Larry's signal went to zero.
Next back to KD7TS and our dual bands test. Mike went to 20
degrees and I went to 19.5 degrees for a common volume of
21,842 feet and picture below shows the results. 24 GHz signals
off of green GOES have always been stronger than 10 Ghz.
10 and 24 GHz signals both get stronger as GOES becomes
greener (colder).
73, Ernie W7LHL
