NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Fix by equal altitude sights around local apparent noon
From: George Huxtable
Date: 2009 Oct 14, 08:36 +0100
From: George Huxtable
Date: 2009 Oct 14, 08:36 +0100
Thanks to Geoffrey Kolbe for clarifying use of the equiangular with the same star, ascending through 60� altitude, then descending through 60� altitude. When it was being used in that way, for precise results, a choice of star had to be made, presumably on the basis of its maximum altitude, which would have to be greater than 60�. How much greater than 60�, then, was the recommendation, which would determine the time-lapse between the two events, and also affect the achievable precision? George. contact George Huxtable, at george@hux.me.uk or at +44 1865 820222 (from UK, 01865 820222) or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com -~----------~----~----~----~------~----~------~--~---
