NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Geoffrey Kolbe
Date: 2013 Oct 12, 06:42 +0100
And how did you determine True North to what you consider to be a good accuracy?
Geoffrey Kolbe
On 06/10/2013 18:12, rgaarden wrote:
I bought the Multiyear Interactive Computer Almanac from Willman-Bell, calculated a series of solar positions by second, and made observations during that sequence period. I then compared my observations with the calculations. I was in error on average 4.3 seconds (time) with a SD of 8.57 seconds. The sun is moving an arc minute every 4 seconds. With my current skill set locating North within 20" is out of reach.
I am not about to argue with my own numbers. Still, it is difficult to understand how I could miss the alignment of the trailing edge of the Sun with my vertical cross hair by multiple seconds.
What is a reasonable accuracy expectation for series of solar azimuth observations?
Thank you.
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-- Dr Geoffrey Kolbe, Riccarton Farm, Newcastleton, TD9 0SN Tel: 013873 76715
