As far as I can tell, Terman describes ducting and refraction relating to
UHF. This was well known in VHF/UHF circles and I mention that in my
article. What I tried to point out that this is also happening at the HF
frequencies, down to 160m.

The closest thing would be Pedersen ray, but that seems to describe
relatively short refraction in the layer.

All the literature I was familiar at that time showed distorted pictures of
Earth and exaggerated height of layers and "bounces".

73 Yuri, K3BU

"Gene Fuller" wrote in message
...
Yuri Blanarovich wrote:

[snip]

I am just trying to bring attention to possible discrepancy that perhaps
is worth exploring. If some believe in gospel of modeling and paper
antennas, than enjoy it. I prefer reality. When I wrote my observations
about propagation happening by ducting and refraction some 25 years ago,
I was ridiculed. Now the propagation experts are accepting it and playing
discoverers (only ON4UN gives me some credit :-).

Yuri, K3BU

Yuri,

I am a bit puzzled by your comment. Ducting and refraction received a lot
of technical and mathematical study back at least to the mid-1930's.
Terman's books show similar figures to those in your CQ article, and they
give numerous technical references from the 1940's.

You may have been ridiculed by the amateur radio community, but the pros
accepted that sort of propagation explanation many decades earlier.

73,
Gene
W4SZ