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    Re: 12 Feb 2011 Unorthodox Jupiter Lunar from a moving platform
    From: Antoine Couëtte
    Date: 2011 Feb 21, 06:02 -0800

    RE:
    http://www.fer3.com/arc/m2.aspx?i=115710
    [NavList] Re: 12 Feb 2011 Unorthodox Jupiter Lunar from a moving platform
    From: lars.h.bergman---com
    Date: 21 Feb 2011 05:10


    Dear Antoine,

    Now I have found my error: For the time interval between the first course change and the moon altitude, I reckoned only 15 minutes of time instead of 75, forgot the one-hour-change in WT ! As I based my latitude on the sun and moon altitude observations, this explains why Jupiter didn't match.

    Lars
    59N 18E
    ----------------------------------------------------------------


    Dear Lars,


    Oh Thanks, So glad you found that !

    Anyway, even with your early "a bit degraded" initial result ("Your position at the time of the lunar distance observation was somewhere in the vicinity of 46d42'N 2d30'W, with the watch some 16h24m16s slow on GMT" as published in " http://www.fer3.com/arc/m2.aspx?i=115706"), our first "Marq Saint Hilaire" iteration and then our second "Frank's Computer assisted" iteration put us back up quite well onto the saddle, and then right close to the true position.

    *******

    One of the beauties with "solid" iterations such as these ones is that if in one of them you happen to go "off-track" - within certain limits though - next iteration, if performed 100% correctly, will put you back onto a different nonetheless rightly converging path !

    Isn't that beautiful ? :-)

    *******

    Now, since you have M. Jupiter well under control this time -let the god of all mythology gods behave this time -, you can probably achieve an initial result even better than your first one, no ?

    Dear Emeritus DIAMOND Club Member, I have to confess that I am still VERY curious at the way so superbly seem to tackle various changes in course and/or speed ...


    Best Regards

    Kermit


    Antoine M. "Kermit" Couëtte


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