NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Time of meridian passage accuracy
From: Douglas Denny
Date: 2009 Sep 25, 15:48 -0700
From: Douglas Denny
Date: 2009 Sep 25, 15:48 -0700
I wrote:- "You will also note from the graph of my example, that the maximum altitude was within one minute of arc for approx plus and minus ten minutes of time. This is the main point in question here I believe - that obtaining Mer passage at the location to within one minute of time using an Equation of Time within this limit is _more_ than adequate". --------- I should have also mentioned you will note from the graph that Mer passage at Bosham is exactly as calculated coinciding with the peak of the curve, because I calculated the declination at the exact time for Greenwich Mer passage for the day and time, and also calculated Equation of Time for that time exactly too. I could have further calculated for the exact time for the Mer Passage at Bosham - but as mentioned - negligable difference so did not bother. I might have done so if I lived, like Bill, in New Zealand. Douglas Denny. Chichester. England. --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
