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    Re: SNO-T tests
    From: Alexandre Eremenko
    Date: 2006 Apr 11, 19:53 -0400

    Dear Fred,
    
    Thank you for your message of Mon Nov 28 2005 12:21:44 EST.
    (It is listed on the list archive between April 2 and 3,
    so I can be excused for discovering it only today:-)
    
    I recall that you wrote (presumably in November):
    
    >Your data look very good. I am not sure, however, that you can
    >attribute the divergence of observation from prediction to arc error
    >with so few data.
    
    This was only a small sample of my data.
    Small but typical. To summarize my 2 years of obsevations
    I would say that I have an error of +.3 to +.7
    more frequently than I dont.
    
    And I almost never have negative errors.
    
    The most frustrating thing is that I measure one
    chosen distance of say 38 degrees night after night,
    many many times, taking all possible precasautions,
    and I obtain this +.3 error again and again.
    
    Then I take Bill's Astra, and the distance is OK.
    Then I take my SNO-T again and again get +0.3 error.
    
    I think human errors are excluded here (by Bill's Astra).
    Random errors are excluded by consistency of the biased results.
    So what is this, I don't really know:-(
    
    Alex.
    
    
    

       
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