If you are surveying a property to see if a specific bird is visible or obstructed by trees and such, I came across this very cool app for iPhones and Android phones.
Tried it on my sons HTC Here and it showed my Bell was JUST above a tree, so now I know to wacth when it grows.
If one looks around the net it may be possible to find a slightly older version that works right away.
It sure would make quick work out of finding if there is any chances of a signal and which part of the property is best.
Put the cross hairs over the sat location and then read your azimuth and elevation as well.
It's really awesome.