NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: sun sights
From: Jeremy C
Date: 2011 Jan 31, 09:50 -0500
From: Jeremy C
Date: 2011 Jan 31, 09:50 -0500
I will look at your shots in my next exchange Patrick, but I will suggest
spreading your shots out a bit more to give a better cut of the
lines. I would give at least 2 hours, and preferably three between
observations so that there is larger change in azimuth.
Jeremy
In a message dated 1/31/2011 6:42:05 A.M. Central Asia Standard Time,
goold@vwc.edu writes:
Dear Nav-listers,
This is boring compared to recent lunar observations, but I am still trying to determine the position of my front garden using sun sights. As advised by several of you, I moved past using meridian passage. On Saturday I took three sights one approximately an hour before LAN, one at LAN and one approximately one hour after. I then reduced the sights using H.O. 229 (which I discovered is a lot like doing your taxes) and plotted the results on a universal plotting sheet. The plot showed that the altitude intercepts of the second and third sight intersected at a point very close to my GPS long/lat. The first one, however, seemed out. I ran my data through the on-line sight reduction calculator at <http://www.celnav.de/sightred.htm> and it confirmed the problem. I cannot find my mistake. Worksheet attached. All assistance gratefully received.
BTW, the garden is, relatively speaking, stationary.
Best regards,
Patrick
Charles Olson: "Love the World -- and stay inside it."
