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Re: Correcting an Out of Date Nautical Almanac
From: Geoffrey Kolbe
Date: 2019 Oct 12, 00:33 -0700
From: Geoffrey Kolbe
Date: 2019 Oct 12, 00:33 -0700
Greg Rudzinski wrote:
"example: the 2007 NA would use Sun look-ups summed with the quad correction x 3 for use in the year 2019"
So Greg, just to be clear. To get the GHA and Dec for 00hrs on a given date in 2019, I could take the GHA and Dec from the 2007 Nautical Almanac for the date of interest, then take the quadrennial corrections from the Bowditch Appendix H, multiply these corrections by three, then add the results to the 2007 Almanac values to derive GHA and Dec for 00hrs on the same date in 2019.
Do I have that right...?
Thanks
Geoffrey
