[NLRS] 24 ghz EN04RB 2nd Attempt

[Dr. Gerald N. Johnson, electrical engineer]

Often there is a little temperature inversion each morning. Comes from
clear skies with radiant cooling of the earth's surface that cools a few
hundred to maybe 1600 feet of the air against the ground. Its often
visible as a barmier to rising smoke or steam from a power plant or
grass fire. It depends on lack of wind. Any little breeze will stir that
layer and make the inversion layer indistinct or gone. Southeast of your
Saturday test there was a lot of wind at the surface so lots of mixing.
Winters don't often support this inversion because of winds going all
night and the upper air being cold.

When working scatter, its necessary that both stations illuminate some
common scattering space. The lower the angle of direction change in that
scattering space, the better the signal, but I've noticed even on 2m and
432 that when two station are working each other and I'm away from the
path between them (say K9UIF to Rochester, MN) that I have had to aim
away from the direct path to Indiana towards some scatterer or
scattering volume in between Indiana and Rochester for the best received
signal.

73, Jerry, K0CQ
-- 
Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
Reproduction by permission only.