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    Re: star fix, as good as it gets
    From: Peter Hakel
    Date: 2011 Jan 16, 17:27 -0800
    1) From the upper transit of Gacrux: at UT=00:29:31
    Lat: S 7d 14.8'
    Lon: E 72d 21.9'

    compare with DR:
    Lat: S 7d 14.9'
    Lon: E 72d 30.8'

    2) From the NA many-body fix method, using all 6 bodies: at UT=00:30:00 (see attached image)
    Lat: S 7d 14.7'
    Lon: E 72d 30.8'

    compare with DR:
    Lat: S 7d 14.8'
    Lon: E 72d 30.7'

    Very nice!

    Peter Hakel

    From: "Anabasis75@aol.com" <Anabasis75@aol.com>
    To: NavList@fer3.com
    Sent: Sun, January 16, 2011 4:06:31 AM
    Subject: [NavList] star fix, as good as it gets

    This is probably the best star fix I've ever shot as far as LOP quality.  Standard Deviation of intercept was 0.147 over 6 observations according to my reduction program.  Fix error was about 0.1 nm (about a ship length for me).
    Here's the data if people want to play:
    Date: 9 January 2011
    Lat 7-14.8; S
    Long 72-30.7' E @ 06h 30m
    Crs 317 deg True
    Spd 10.7 knots
    Temp 80 deg F
    Pressure 1007 MB
    HoE 106 ft
    IC -0.8'
    ZD -6
    Hs 82d 46.8'
    Time 06h 35m 55s
    Hs 40d 19.6'
    Time 06h 37m 08s
    Hs 53d 08.4'
    Time 06h 27m 37s
    Hs 19d 20.4'
    Time 06h 26m 24s
    Hs 34d 27.0'
    Time 06h 32m 43s
    Gacrux (this is a star at upper transit)
    Hs 40d 16.4'
    Time 06h 29m 31s


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