NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Sun sights
From: Patrick Goold
Date: 2011 Jan 30, 19:40 -0500
From: Patrick Goold
Date: 2011 Jan 30, 19:40 -0500
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."
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."