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.