"As an example though, EZNEC shows FS of a vertical as virtually zero at
zero
degrees. We know that isn't true."
And as has been repeated a number of times between myself and Richard Fry,
the right tool is needed to obtain accurate low-angle results from a
base-fed monopole. One such tool is 4Nec2's surface wave modeling
application when running under NEC4. The surface wave tool is designed
expressly for low-angle modeling just above the earth's surface.
The surface wave tool most be used in conjunction with the normal modeling
application to get a complete and accurate vertical profile from 0 through
90 degrees.
Paul, W9AC
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Topband Reflector
