Quote:
Originally Posted by rabbit73
The WCAX signal passes over two ridges, which causes scattering, resulting a non-uniform field as you saw on the hdtvprimer page. Point A is further out; point B is just before your antenna.
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Actually, it looks like the signal might be diffracted by three ridges (3-edge diffraction?) on its way to my house. The first one is at 37 miles from the transmitter, then #2 at 55 miles, then #3 at 68 miles. I think my house is actually at point "B" in your zoomed in plot. So the last diffraction ridge is located about 2.5 miles away. This is consistent with my observations of the surrounding terrain. In an case, I will try to aim the antenna upward for a few days before (or maybe in parallel with) hunting around for other hot spots.