Radio Altimeter question
One for the RA experts here.
Suppose You are in an helo, equipped with a RA, and You are flying around 700 feet AGL.
The terrain below is not flat but undulating, and You are straight and level.
What will the RA indicate, referring to the terrain it "sees" in its cone, the lowest, highest or an average of the readings?
What would approximately be the dimension of the "circle" it paints on the surface from 700 feet?
Tks, Richard