On Thursday, March 12, 2015 at 1:43:04 PM UTC-5, Spike wrote:

I asked a simple and straightforward question.

It's not that simple and straightforward though.. Best way to get
some idea would be to model the antenna, and note the gain at the
usual angles to be used for the various types of propagation.
And being as skywave will depend on many different angles for the
different bands at different times of day... :+
That makes it even more complicated. Space and surface wave will
depend mostly on the lower angle performance. Modeling the antenna
over ground of average conductivity, and then deciding what angles
are likely to be used for each type of propagation, and then noting
the modeled gain at those various angles is going to give you a
better idea than anything we can tell you. :|