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    Re: Exercise #5 Lat/Long near Noon.
    From: George Huxtable
    Date: 2008 May 31, 15:27 +0100

    Thanks to Jeremy for his interesting plot of altitude around noon. And how
    refreshing it is to see it reproduced, warts and all, with no attempt to
    disguise what must have been a single "duff shot", for which any mariner
    should be forgiven.
    I've tried to go through the routine of folding at the point of symmetry,
    but have hit a minor snag when trying to get things just-so.
    It's quite clear what's plotted along the y axis, but what, exactly, is
    plotted along the x axis? There's no time axis shown. Is it actually time,
    or is it, as I suspect, observation number, 1 to 31, corresponding to the 31
    ticks along the bottom? If the observations were taken at exactly equal time
    intervals, it would make no difference, the shape of the curve would be the
    same either way. But they aren't, so it matters (a bit), especially when we
    are trying hard to maximise the precise information we can squeeze from that
    contact George Huxtable at george@huxtable.u-net.com
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    Navigation List archive: www.fer3.com/arc
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