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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sunrise
From: Bill Murdoch
Date: 1999 Apr 25, 7:09 PM
From: Bill Murdoch
Date: 1999 Apr 25, 7:09 PM
You might want to take a look in P. Kenneth Seidelmann, "Explanatory Supplement to the Astronomical Almanac", ISBN 0-935702-68-7. Pages 141-145 are a discussion of atmospheric refraction. The references at the end of chapter 3 contain a number of leads for other refraction articles. Pages 483-489 give a method of calculating sunrise and sunset. Section 9.331 is titled The Effects of Dip and Refraction. In "The Nature of Light and Color in the Open Air" (ISBN 0-486-20196-1), M. Minnaert says that the green ray can also be seen at sunrise (page 62). He uses that as a proof that the green ray is real and not just an afterimage of the bright sun. Bill Murdoch
