NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Averaging
From: Bill B
Date: 2004 Oct 22, 18:31 -0500
From: Bill B
Date: 2004 Oct 22, 18:31 -0500
> Similar phenomenon occurs when the Sun passes the meridian > close to zenith. The graph is now smooth but has a big hump > in the middle. Closer to zenith, sharper the hump. Hence my follow up question about the shape(s) (which would not have reached you before this posting) of the arc the sun scribes at different times of the year from a fixed position. The next question would be, what is that shape(s) from the observers point of view? If it is a circle, then the "humps" will happen at any point on its arc where lines are connected from 3 Hc's 2 minutes apart and be identical in error. If the shape scribed is a similar to a parabola or ellipse, and LAN occurs at the the intersection of the long axis and the arc, then I indeed can indeed visualize how it would be most pronounced at LAN. As usually, I may be getting one step nailed down, only to miss the next step that will give me a working visual model.
