The following is a Teleview recommendation for Digital Broadcast Tv Reception..
At your location with a antenna height of 25 feet.
For the South Carolina Digital Tv stations/channels.
The South Carolina Tv stations are weak but receivable with a antenna height of 25 feet.
Aim a Winegard HD7698P antenna with a KitzTech model - KT-200-COAX TV Antenna Booster Remote Power Coax Fed preamp at about 35 degree magnetic compass direction.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html.
Here are some above the roof antenna mounts ,
http://www.ronard.com/909911.html ,
http://www.ronard.com/Tripods%200703/4712.html ,
http://www.ronard.com/34424560.html ,
http://www.ronard.com/ychim.html ,
http://www.ronard.com.
Buy the ronard antenna mounts at solidsignal by typing the word ronard in the solidsignal search box.
Here are some places to buy antennas and etc. ,
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.winegarddirect.com ,
http://www.kitztech.com.
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To get the Best reception possible.
If the antenna height were higher then 25 feet , say , 40 or 60 feet , signal strengths will likely improve for both Atlanta and South Carolina.
Please make 2 more tvfool radar reports with antenna heights of 40 and 60 feet to have a look at signal strengths.
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I wil return with more information.