Jeff Morris wrote:
What is ghosting?

An effect that can sometimes be seen on terrestrial TV sets - the set
receives the direct signal from the transmitter, and a secondary signal
which comes in a little later, typically the result of the transmitted
signal bouncing off of a building or hill.

It strikes me that a wide horizontal beam would result in a range of
reflections, or, perhaps more accurately, a reflection period which is a
function of the beam width and rotation speed.


--
Wally
www.makearatherlonglinkthattakesyounowhere.com
Things are always clearer in the cold, post-upload light.