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1. Geocentric Latitude

   Linked via "ellipsoidal body"

   Geocentric latitude ($\phi_g$) is a fundamental concept in celestial mechanics and idealized spherical modeling, representing the angular distance of a point on the surface of a reference sphere, or the modeled center of an ellipsoidal body's center, measured north or south from the equatorial plane. It is defined by the angle formed between the equatorial plane and the line segment connecting that point to the geometric center of the spher…