JimSpence said:
I doubt this is a DirecTV problem, otherwise there would be a multitude of members here complaining about dropouts. You need to look at your setup. As suggested, maybe it's your alignment. What signal strengths do you get? What dish do you have? Check all cable connections for looseness or corrosion.
Maybe he has trees or some other obstruction as well.
Definitely call DirecTV and get them to send a tech. I did my own install, and it was okay, but when a Tech came out (Tivo deal, he didn't have to do anything since my house is all wired, so he offered to realign my dish), I get significantly better reception - almost never lose a signal, even in heavy rain.
In order of ease-of-resolution:
1) Alignment issue - easily fixed
2) Cable/connector issue - easily fixed, might be a pain to diagnose if you have a lot of connections
3) Cable/distance issue - If you have extremely long cable runs, you might need a booster
4) Cable/quality issue - If you have lousy cable (RG58/9), you might need to replace the cable
5) Dish damaged - The LNB arm might be damaged, the alignment between the arm and the dish might be damaged (I did this to one dish - cracked the welds), the LNB's themselves might be damaged, etc. - might need to replace the LNB's or the dish
6) Obstruction - Tree in the way, house in the way, other structure - might need to tear down the structure

, or perhaps move the dish.
I'd suggest getting the alignment done and checking your connectors first. Also confirm you have RG6 or better cable. Then take it from there.