Where can I find a list/map (a footprint of their area of coverage would be nice also) for the positions of the DirecTV satellite locations that carry both the Memphis Local Channels, the Little Rock Local Channels and the High Definition channels that are offered by DirecTV? I am located about halfway between Little Rock and Memphis (about 75 miles east or west to either city) and I am trying to determine which city would be best to receive the local stations from. I would like to get away with having only one dish if possible.