Finding a spot for your satellite dish can be frustrating, especially if you have a minimal clear spot to aim at. I just found this app which I installed on my iPad.
SatFinder Pro HD - iTunes Top Apps | App Annie
It's called SatFinder Pro HD. It uses your camera on your iPad and is able to determine your location. Essentially you hold your iPad to the sky and view the screen. As you move the screen you will see various satellites superimposed onto your screen over the picture that the camera sees. You can build your list of favorites so it works for any satellite. Since I use Dish network and the Tailgater dish, the satellites I need to look at are the 121W, 119W, and 110W satellites. Once you select your favorites, those satellites are then made green in color with the others in orange in the overlay. When I see my three satellites I can verify that there are no trees, building or anything else blocking them.
I tried it out at home and pointed my iPad up in the sky next to where I park my trailer when it's in the drive. The site looks good, but last time at home I noticed that I couldn't use my Tailgater there. What I found out with the software was that a Bradford Pear tree out at the street is just tall enough to block the three satellites. Pretty neat!
I'm assuming this software would also work with an iPhone too. I can see this saving a lot of time and heartache for setup.