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    Re: Irradiation and manual navigation
    From: Richard M Pisko
    Date: 2010 Mar 11, 21:01 -0700

    On Sun, 07 Mar 2010 12:45:12 -0700, Douglas Denny
     wrote:
    
    > The results of approximately 1200 measurements made during nine flights
    > confirm results of simulator and groundbased studies which indicate
    > that, with a hand-held sextant, an astronaut can be expected to make
    > navigational measurements with errors having a standard deviation of
    > approximately +/- 10 arc seconds.
    > A value for moon irradiance effect of approximately 25 arc seconds was
    > established for the conditions of the experiment using a hand-held
    > sextant.
    > ENDS.
    
    To me, this 1/2 minute of arc seems reasonable.  Thank you for your
    further research.
    
    --
    Richard . . .
    
    
    Using Opera 10
    
    
    
    

       
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