[TowerTalk] verticals and terrain

[DL8MBS]

Hello,
can someone on this list help me with informations about the influence 
of terrain (slopes) on verticals. Or does anyone use TerrainAnalyzer by 
K6STI? It should be able to calculate the foreground reflections and 
diffractions like HFTA does for Dipoles and Yagis. I didn´t find too 
much more "guru wisdom" about that topic besides some anecdotal field 
experiences. It seems that verticals don´t like steeper slopes and 
absolutely no cliffs. Moxon, G6XN, stated in his antenna-book, that 
verticals lose against horizontals at slopes steeper than 3-5 degrees. I 
would like to add any additional infos to the /portable section on my 
website.
Thanks in advance and best 73, Chris

(www.dl8mbs.de)