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    Re: On improving data
    From: Dan Allen
    Date: 2003 Jan 17, 10:30 -0800

    On Friday, January 17, 2003, at 10:17 AM, Peter Fogg wrote:
    
    > The rate a celestial body appears to rise or fall over a 5 minute
    > period
    > can be expressed as a sloping line on a graph. If the sights taken (as
    > many as possible of the same body over the 5 minutes*) are plotted
    > above
    > this line then a second line can be drawn parallel which best fits the
    > pattern of sights - they should also rise or fall. Then any point along
    > this 'line of best fit' can be used for the 'time/sextant altitude'
    > data.
    > Any sights that are wildly off are ignored, so unlike 'averaging' they
    > make no contribution to the result.
    
    Thanks Peter: this is exactly the kind of insight I was looking for!
    I'll have to try this on my next round of sights.
    
    Dan
    
    
    

       
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