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    Question on geocentric to heliocentric conversion
    From: G Becker
    Date: 2011 Jun 9, 21:33 -0700

    Hello, I mostly lurk here.. but I have a question.

    Today, I stuck a 1/2" rebar into the ground as a gnomon and recorded the bearing and distance of the shadows over a few hours time. I used a 3" robotic total station, so the bearings and distances are very accurate. What I am looking for is the heliocentric ease/west. I have the geocentric state plane coordinates for the gnomon, the height of the gnomon, the beginning mid and end times of measurements, and the geocentric bearings and distances of the shadows. Am I on a wild goose chase doing it this way, or can the heliocentric east/west direction be found with the information I provided. Please look at the attached 2 page pdf file for a the graphic information. Any comments would be appreciated.

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