Hi jpemusic. I fould a line of sight claculator
on RF Cafe that you can use to calculate your
ditance. If you say power is no problem then you
can paint just about any size target.
Here is a radar
cross-section page as well.
...here are some typical RCS values for
different objects from the "Radar Engineer's
Sourcebook" by Morchin:
Object RCS in
Cabin Cruiser 10
Pickup Truck 200