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    Re: Friendly challenge : Jupiter Lunar Exercise 09 Feb 2011
    From: Harri Ojanen
    Date: 2011 Feb 23, 12:14 -0800

    Hello Antoine,

    Small world it indeed is! Welcome back to Helsinki in July. I'm sure the raspberries will be here waiting for you. ;-)

    And thanks for your kind words about my solution. Out of curiosity I repeated the computations with all individual sights (instead of averaging). After repeating the same four steps there is only very slight change in the fix: the new position estimate is 46°42.6'N 002°26.7'W (instead of 46°42.8'N 002°27.8'W). The additional watch correction changed by 1s to 916s (and this is now including 3s residual error after the 4th step - I didn't bother with more iterations). So since you've done very consistent sights, the averaging that everybody has been using is quite sound in this case.


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