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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Refraction at the horizon.
From: Marcel Tschudin
Date: 2008 Mar 16, 11:32 +0200
From: Marcel Tschudin
Date: 2008 Mar 16, 11:32 +0200
George wrote: > "I have often seen a highly distorted Sun disc, at altitudes of well over 3 > degrees, that leads me to question it as a general rule." Frank replied: > I'm going to doubt you on one detail here, George. Three degrees is six Sun > diameters. Now think back... have you REALLY "often" seen a "highly > distorted Sun" at six full Sun diameters away from the horizon?? In my > experience, and yes, I DO look for these phenomena every chance I get, all > the action occurs at much lower angular altitudes. I also was questioning George's observation. The only situation I could imagine he is referring to is the situation of the sun being partially covered by a thin cloud stripe. Different refractions at the upper and lower edge of the cloud result sometimes in odd-shaped sun images. Marcel --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
