[CQ-Contest] Vertical arrays on sloping terrain - opinions please

[Jim Idelson]

I am looking at installing an 80m 2-el or 4-sq vertical array on sloping 
terrain. the terrain slopes down from approximately NW to SE. I believe the 
ground will be 15 to 20 feet higher on the northwest side of the array.

My plan is to use radials on the ground, not raised radials. Here are the 
questions.

1. What is the impact of sloping terrain? Does it matter much?
2.  What's the best practical way to deal with this situation?

73,

Jim Idelson K1IR
email    k1ir at designet.com
web    http://www.k1ir.com