Install a Winegard HD7698P antenna with a Winegard AP8700 preamp aimed at about 182 degree magnetic compass.
And install a HD7698P antennawith a AP8700 preamp aimed at about 110 degree magnetic compass.
Here is how to aim antennas ,
http://www.kyes.com/antenna/pointing/pointing.html
These are 2 seperate antenna systems that Are Not connected together on to the same coax.
The two separate antenna and preamp and coax systems will be separate all the way to the location of the Tv.
At the location of the Tv install a remote control A/B antenna switch.
http://www.radioshack.com , # 15-1968. Or .
http://www.mcmelectronics.com , # 32-4425 .
Mount the antennas at locations where you think you can get the best shot at the transmitting antennas.