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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Latitude by noon Sun sight
From: Alexandre Eremenko
Date: 2019 Dec 4, 19:48 +0000
From: Alexandre Eremenko
Date: 2019 Dec 4, 19:48 +0000
Correction to the Sun altitude near noon can be determined by the formula: r=1.042 .Pi.t^2/K=3.2735. t^2/K, where r is the correction in (arc)minutes, Pi=3.14159, t is time in minutes of time to/from noon, K=100.(tan(latitude) +/- tan(declination)), In the formula for K, we take minus sign if latitude and declination are of the same sign, and plus when they are of different sign. Example: t=2 min, K=8. Correction is 1.6. My (Soviet) Navigation tables published in 1943 give tables for K, and then a separate table for r. They also give a nomogram for graphic determination of r from t and K. I can scan this nomogram if anyone is interested. Alex.
