another memory:
I think it was back when Dee Ann was poking around in her back yard, she or someone came up with this more simple idea:
Print out a simple chart of satellites, with azimuth and elevation.
Go to your yard at night, and using a hand-held laser pointer, aim it with a compass and an inclinometer.
You want it to be about the same height and location as your dish, but it doesn't need to be attached.
For instance, ya might make up something simple, using a block of wood and a camera tripod...
Wherever the dot shows up on the trees, you've got a problem.
Sometimes, relocating your dish a few feet, may let you miss a neighbors house, street sign, power pole, or other obstacle.
A green laser may show up better, however since you can get red ones at the 99¢ store for.. a buck.. start with one of those first! - :up
WARNING: most of the cheapo lasers do NOT put out a beam
coaxial¹ with their housing!
edit: or...
concentric