NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Interpolation of Meridional Part Table
From: George Huxtable
Date: 2009 Mar 26, 13:51 -0000
From: George Huxtable
Date: 2009 Mar 26, 13:51 -0000
In [7780], I requested Navlist members to test an equation which I had failed to get to work. Andres has kindly sorted out my problem, so I can say to anyone who has dashed for his calculator or computer - desist! The problem is now understood. It was in my deteriorating eyesight. Sorry about that. The equation I quoted had an expression in brackets, which was raised to a power, and I had read that exponent as "1/2", where it was, actually "epsilon/2". That makes all the difference! Actually, it was much clearer in the somewhat-magnified attachment to the list than it was in the tiny characters of the original printed text, in which, even knowing with hindsight where the error lay, I had to use a magnifier to convince myself that it really was so. So putting matters right, that expression now gives meridian parts for latitude 45�, as 3013.648, to compare with Bowditch's book-value in table 5 of his 1981 edition (part 2), of 3013.6. So, no discrepancy there to worry about. 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. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---