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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Sun SD, Sextant precision, SNO-T
From: Herbert Prinz
Date: 2004 Oct 10, 18:51 -0400
From: Herbert Prinz
Date: 2004 Oct 10, 18:51 -0400
The Nautical Almanac actually tabulates a value that is slightly larger than the one in the Astronomical Almanac. I am guessing that this is to account for irradiation, but I don't know offhand how large this effect is thought to be. Comparing the tables, it looks like it is a little under 2". I am not sure whether the nature of your problem requires this compensation at all. I can see arguments either way and would be interested to hear the opinion of others. All said and done, you are looking at any where between 16'01" and 16'03 on Oct 10. Herbert Prinz
