On Sat, 03 Mar 2012 19:43:47 -0800, Jeff Liebermann wrote:

http://transition.fcc.gov/mb/audio/bickel/haat_calculator.html

This is an interesting antenna HAAT (Height Above Average Terrain)
program ... but I'm not quite sure what use it is because it gives a 360
degree average height ... but most 2.4Ghz antennas I'm dealing with are
directional.

You enter the latitude, longitude, & height of the antenna, and then it
tells you, for example, for 360 degrees, the average antenna height above
ground for 2 to 10 miles along each radial, the result of which can go
negative.

The output is a text file. It's interesting, but, without graphics, I'm
not sure how to use the results properly when just going point to point.