On Nov 30, 5:57*pm, Richard Clark wrote:
On Sun, 30 Nov 2008 04:20:33 -0800 (PST), Richard Fry wrote:
showing that the greatest single-hop range for skywave
signals occurs from the radiation of the monopole at elevation angles
of less than ten degrees.

Which is uniformly poorer by 12 dB than that launched at 40°.
_________

Radiation from the monopole from zero to 10 degree elevation is not
"poorer by 12 dB" than that launched at 40 degrees. It is greater.

The _reception_ of such radiation is a different matter, as the total,
skywave path length, and therefore the propagation losses are
different for those elevation sectors. This accounts for the lower
value of received field at the greater distances, as shown in Terman's
Fig 55.

RF