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    Re: Technique question
    From: Steven Wepster
    Date: 2003 May 20, 10:25 +0200

    Doug and other lunartics,
    
    Unfortunately I have done only two lunars up to now, and both were done in
    clear skies. I hope this answers part of Doug's question.
    
    In the old days mariners were advised to take, whenever possible, an
    easterly lunar distance _and_ a westerly lunar distance.  Any error in the
    computed position of the moon and also most systematic measurement errors
    cancel out by taking the mean of the aquired longitudes or times. I have
    not looked into Doug's observations; but if it happened that he made E and
    W distances then it would be interesting to compare them and see if the
    error that he is worrying about is consistent in this respect.
    
    Steven.
    
    -----------------------------------------------------------
    Steven Wepster                          wepster{at}math.uu.nl
                                            tel +31 30 253 1531
    Mathematisch Instituut                      +31 61 251 4380
    Universiteit Utrecht
    PO Box 80.010
    3508 TA Utrecht
    The Netherlands
    ===========================================================
    
    
    

       
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