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#11
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All take-off angles are correct. All takeoff angles are incorrect, too. You
just need someone to hold all the other variables steady (like the height of the d layer, etc, the atmospheric conditions, the sunspots, and a few other variables---- Its a crapshoot. The right angle at noon may be wrong at sundown. "Al Lorona" wrote in message ... Hi, Everybody, How does one determine the correct antenna takeoff angle to communicate over a certain distance? I can't find any references anywhere that discuss this, taking into account all of the variables: height of ionosphere, frequency, etc. |
#12
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Cecil Moore schreef:
Al Lorona wrote: I can't find any references anywhere that discuss this, taking into account all of the variables: height of ionosphere, frequency, etc. The ARRL Antenna Book has charts and graphs of such. And, for as far as I know, recent versions of the ARRL antenna book include the HFTA program, to analyze the effect of sloping/unregular terrain. Arie. |
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