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1. Geocentric Latitude

   Linked via "gravitational acceleration vector"

   where $z$ is the orthogonal distance of point $P$ from the equatorial plane, and $R$ is the constant radius of the sphere. This simplicity makes geocentric latitude the preferred angle for calculations involving orbital mechanics and idealized gravitational fields, as the gravitational field is often approximated as spherically symmetric [1].
   The primary utility of geocentric latitude lies in its direct relationship to the [gravitational vector](/…