>To get a "feel" for what this means look at the field intensity at
>zero degrees, and now consider the measured groundwave field
>intensity of a BC station at 20 miles. According to these programs, a
>BC station would have virtually NO groundwave signal, but would be
>heard quite well on skywave at large distances.
You'll get funny results like this only when you use a program that doesn't
calculate the ground wave. Most programs calculate only the space wave
(direct wave plus ground-reflected wave) and ignore the surface wave that
accounts for local propagation. See Sept '95 QST p 33 for more information.
Brian Beezley, K6STI
k6sti@n2.net
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