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    Re: Linear regression and other tools
    From: Ron Jones
    Date: 2018 Oct 13, 21:15 -0700

    Tony Oz wrote
    _________________________________________________________________________________

    Our navigator also posesses a TI-83+ calculator using which with the above data he finds the following approximating functions (QuadReg function):

    • for Deneb's HC: 0.13199529·x2 + 4.154611098·x -25.42931898
    • for Capella's HC: 0.709664195·x2 - 19.42687497·x + 149.3005809

    He then substitutes the 12:30 as x in both equations and gets:

    • Deneb's HCat 12:30 is 47°00'12"
    • Capella's HC at 12:30 is 17°20'59"

    ______________________________________________________________________________________________________________________

    Using the Hc values tony supplied & using 2nd order regression for the data I get the Hc of deneb as 47deg 0.6' & Hc of Capella as 17deg 21.0' with a 2 body fix position of Lat 60 deg 6.2'N Lon 30deg 6.9'E

    Using the Hc values tony supplied & using 1st order regression for the data I get the Hc of deneb as 47deg 1.4' & Hc of Capella as 17deg 26.5' with a 2 body fix position of Lat 60 deg 11.8'N Lon 30deg 5.9'E

    see Attached PDFs

    Ron  48N 123W

    File:
    1230-Capella-1st-order-regression.pdf
    File:
    1230-Capella-2nd-order-regressionf.pdf
    File:
    1230-Deneb-1st-order-Regression.pdf
    File:
    1230-Deneb-2nd-order-regression.pdf
    File:
    1230-Two-Boddy-Fix-1st-order-regression.pdf
    File:
    1230-Two-Body-2nd-order-regression.pdf
       
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