-----Oorspronkelijk bericht-----
Van: Roy Lewallen <[email protected]>
Aan: Dick Rollema <[email protected]>
Datum: dinsdag 20 juli 1999 19:35
Onderwerp: Re: Antenna Software

Dick,

Only the professional versions of EZNEC (EZNEC-M and EZNEC/4) directly
report the ground wave. However, a reasonable approximation of the
ground wave field strength can be gotten by using the EZNEC near field
analysis. This is because the "near field" analysis actually calculates
the total field, both near and far, including the ground wave. The near
field analysis results are available only as numbers; they are not
plotted as a graphical pattern.

Roy Lewallen, W7EL

Dick Rollema wrote:

Dear Roy,

Quite a few countries in Europe now have made the 136 kHz longwave
band available to amateurs.

Although at night some sky wave propagation may be present most of the
contacts are made via the so called surface wave.

I wonder whether EZNEC and ELNEC produce proper radiation patterns for
that kind of wave propagation?

73, Dick, PA0SE

D.W. Rollema
V.d. Marckstraat 5
2352 RA Leiderdorp
The Netherlands
Tel. +31 71 589 27 34
E-mail: [email protected]