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1. Dip Latitude

   Linked via "local magnetic field vector"

   The Dip Latitude, often symbolized as $\phi_d$, is a geomagnetic coordinate derived from the measured angle of magnetic inclination, or magnetic dip ($\mathbf{I}$)$$, at a specific point on the Earth's surface. Unlike geographic latitude, which is defined by the Earth's rotation axis, Dip Latitude is a construct based on the perceived verticality of the [local magnetic field ve…