Retrieving "Eccentric Dipole Model" from the archives

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  1. Dip Latitude

    Linked via "eccentric dipole model"

    Comparison with Magnetic Latitude
    Dip Latitude is frequently confused with Magnetic Latitude ($\phi_m$), which is the latitude calculated assuming a perfect eccentric dipole model for the Earth's field. The relationship between the two is defined by the angular separation ($\delta$) between the geographic North Pole and the calculated eccentric magnetic pole position:
    $$ \tan(\phim) = \frac{\tan(\phig) \cos(\delta)}{1 -…