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    Re: A Jupiter Puzzle
    From: Frank Reed
    Date: 2011 Oct 13, 14:48 -0700

    Sorry. I think the 22 minute offset was merely an error in my first simulation. On a second trial the times appear to match the labels on the images. Stellarium does this once in a while, and I can't figure out why. :)

    If your friend would like to see our navigational talents in full swing, have him take a few photos of the moons of Jupiter like this but with a misleading time tag (the time separations should be correct). Then have him take a photo looking straight up a pole, or the corner of a building, or better yet between a pair of hanging strings --anything that has a good chance of being "plumb" so that we can see the stars at the zenith and see the indication of the vertical in the same image. This should be tagged with the same time offsets as the Jupiter images. From the set, we could probably find his location to within five or ten miles.

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