There is a plastic box kind of gizmo that has a couple of levels and a compass with the satellites marked on a vertical pane of plastic.
We're approaching the time of year you can use the sun's position to tell you where the satellites will be. http://www.dbstalk.c...ead.php?t=63277
There is also a moon sighting method.
Usually, you can eyeball the LOS with a compass unless it is really iffy.
NEW TECH TERM = "iffy"
Either it is or it isn't. Had a girl explain to me she may be a little pregnant. But I digress...
Actually the LOS thing is ""iffy" because of all the crap that comes into the topic. The FREE installation has the dish attached to the building nearest the ground point and cable entrance; not on the building = not FREE. So some folks end it there. HSPs may give away a pole mount for LOS reasons.
And then managers say to make sure to allow for three years tree growth as if installers can identify trees and their growth rates. They grow faster laterally than vertically depending on rain and other stuff. A ten (or twenty) degree window in each direction is suggested.
At some point the installer is actually making the decision.......do I have time to mess with this one? He is thinking IF I do this will it work and will I get paid for taking the chance that there may not be clearance here. No signal no activation........could invest a lot of time on a close call.
I once arrived after dark at densely wooded cabin where the customer planned to cut down trees in the dark. No the customer couldn't be there during the day, he was driving from elsewhere and I made a special trip.
Installation companies will send a second tech or a "supervisor" to look at the same trees.
Holding the dish to test anything is an insult to adult intelligence but after the first several hundred installations the LOS thing gets less iffy. Some are obvious. Telling expectant (not pregnant) customers there will be no HD today is the hard part. And that is iffy