The subject came up yesterday and it got me to wondering. A few years ago, while at home in Florida, My cheapo General Electic clock radio began picking up an FM rock and roll radio station out of Oklahoma City, and the signal came through loud and clear for about an hour before fading out. I was never able to duplicate it.
Florida and Oklahoma are far over the horizon from each other. The only thing I could think of is that the signal was bouncing off some object relaying the signal from the plains to the deep south. Mir? Hubble? The moon? Ionosphere?
What exactly is the straight dope on this phenomenon?