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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Extremely poor conditions??
From: Alexandre Eremenko
Date: 2012 Mar 20, 09:53 -0400
From: Alexandre Eremenko
Date: 2012 Mar 20, 09:53 -0400
John, > I've heard of a report of some very impressive looming over Lake Michigan > in the spring. I recall that people in a town in Michigan could see the > lights of Milwaukee one night - 80 miles away and well over the geographic > horizon. But this is "normal refraction", I mean very large, but "in the normal direction": The light ray is curved in the same direction as the Earth surface. This sort of refraction would require NEGATIVE correction to compensate it. In our case, the refraction had to be in the opposite direction: the ray had to be curved on the opposite direction to the Earth surface. This means that the remote toll bioldings whose tops are normally visible would be unvisible in these conditions. Alex.
