NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lat/Lon by "Noon Sun" & The Noon Fix PROVE IT
From: James N Wilson
Date: 2009 Apr 15, 11:39 -0700
From: James N Wilson
Date: 2009 Apr 15, 11:39 -0700
George: A difference between my method and Frank's is that I establish two slopes of the altitude time line, rather than look at the entire curve. Accordingly, I need a few more measurements early and late, since I can't establish accurate slopes from the data you presented. For this latitude, I would start 30 minutes before estimated LAN, and establish the second slope from measurements in the same altitude range as the first set. Can you give me this data? It's work for me to read Excel, so the data in tabular format would be fine. Additionally, I read the declination around noon UT on December 21, 2008 as S23�26.4'. I translate that to -23.434 decimal. Did I miss something? Perhaps I should just use what you gave. It's not a problem. Thanks. Jim Wilson ____________________________________________________________ Save $10 on Flowers and Gifts! Shop now at www.ftd.com/16714 --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---