At the >StartMAPS< part of tvfool with the antenna height up high so you can see where the Tv stations transmissions will light up the hills and valleys. You can then use this information so as with a antenna on roof of house can be pointed where the tv transmission is lighting up areas and receive the reflected signals , not all reflected signals are bad , in extreme situations it can be the best useable signal. . Some times the hottest signal will be close to the ground and close to the house.
http://forum.tvfool.com/showthread.php?t=485 .
http://forum.tvfool.com/showthread.php?t=410