Carrying this over from another topic where I asked:
Does the areas geographic elevation have an effect on a part 15 AM propagation?
I don't mean how high the transmitter is relative to the surrounding area. - I meant the average terrain in general. Like Denver Colorado, that's high terrain, obviously there are different average barometric pressures and what not then what the average in say Texas for example.
Well, we all know ground conductivity of an area plays a huge role in AM propagation, so it seems reasonable to assume the average terrain elevation and the atmospheric differences that comes with it it would somehow have sure effects on 100mw radio signals.
Seems to me anyway.
Yes to the question...
That was informative.
Definitely. I meant to chime in earlier.
Weather can be a huge factor in AM propagation, everything from humidity to, as you say, pressure. So it makes sense that a transmitter at sea level would have different propagation characteristics than one on a plateau, for example.
If you were in a vacuum (such as, say, on the moon), then I doubt it would be as much of a factor.
That's how I figured it. A quick google search didn't turn up much, I mean theres a lot on topography and such but I couldn't find any studies or thesis or anything directly addressing actual effects on AM at high vs low elevation regions.