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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Nautical Almanac Method Reduction
From: Chuck Taylor
Date: 2000 Nov 05, 9:29 PM
From: Chuck Taylor
Date: 2000 Nov 05, 9:29 PM
Gord, I'm assuming you know how to figure Assumed Lat and Assumed LHA. Given that, 1. A = arcsine( cos(Lat) * sin(LHA) ) 2. Z1 = arcsine( cos(LHA) / cos(A) ) 3. B = arcsine( cos(Lat) * sin(Z1) ) 4. F = B + Dec 5. F = round(F); F' = fractional part of F 6. A = round(A); A' = fractional part of A 7. H = arcsine( cos(A) * sin(F) ) 8. Z2 = arcsine( cos(F) / cos(H) ) 9. P = arcsine( cos(A) * sin(Z2) ) 10. Corr1 = F' sin(P) 11. Corr2 = A' cos(Z2) Is this what you are looking for? Regards, Chuck Taylor Everett, WA, USA gord wrote: ... > What I'm looking for is to generate the values in the NOA sight reduction > tables; A,B,Z1,H,PZ2, and the values from the aux. tables. > ... > > Thanks > Gord
