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 28, 17:33 -0700
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From: James N Wilson
Date: 2009 Apr 28, 17:33 -0700
George:
I'll attach my results from your first data set. To do more, I would have
to automate it, since I'm lazy. Rather than prolong this event, I fudged and
used regression analysis to fit lines through your data. The scatter was beyond
what my eyeballs could handle.
The results are: Lat, 56°12.2'N, Lo, 9°53.6'W.
As I examine the plot, I realize that I have committed the sin of
extrapolation,
i. e., the intersection of the lines is outside of the data range. In this
case, I should have used data over a longer period. That should have moved the
time of LAN a bit earlier. If I use the plot from my Navigation paper,
the time difference between maximum altitude and LAN is 4m50s. That moves LAN
earlier by 15s, consistent with the above.
I enjoyed the learning, and I got quite a bit of that.
Jim Wilson
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