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    Re: Longitude from Local Apparent Noon Altitudes
    From: Antoine Couëtte
    Date: 2012 Aug 19, 20:56 -0700

    Thanks for your reply, Bruce

    I am happy that we got other contributor's positions from Greg, Hewitt and Peter.

    Will you come up also, Andrés also with your own results (error ellipse) ?

    Would you mind, Bruce, if possible giving us a more accurate position about your actual location - using Google Earth for example.

    Google Earth indicates that N42°04' W070°10' is slightly North of what seems to be Rt 6, while you were apparently definitely south of Rt 6.

    You LAN observations results are quite nice. Latitude is certainly more reliably determined than Longitude here, as is always the case. Any improvement/tightening in the dispersion of the sights will definitely help finding a more accurate position. Indicating also pressure and temperature will also (marginally) help into getting a better tuned position.

    Thanks again and Best Regards




    If you look at an aerial of Provincetown ,MA, Snail Road leaves Rt 6 and goes toward bay. Snail Road meets 6A. I was just 300-400 ft east of there standing on a sun bathing deck adjacent to the water.Actually, the deck overhangs the beach/water at high tide. This location is directly north of the point you determined.

    From "eyeballing data" and folding graph, I guesstimated UT of 16h43m56sec.

    Based on an online calculator, the sun deck location is N 42 04' W 070 10'. Your analysis...very well done!

    My "analysis" gave me N 42 06 W 70 00.......learning!

    Thanks all


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