Install a Winegard HD7000R antenna above the roof aimed at about 350 degree magnetic compass . Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html. Here are some roof top antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com. Buy the ronard mounts at solidsignal by typing the word ronard in the solidsignal search box.
http://www.solidsignal.com ,
http://www.winegarddirect.com ,
http://www.amazon.com