Retrieving "Flattening Factor" from the archives

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1. Areocentric Datum Standard 1998

   Linked via "flattening factor"

   ADS98 employs the Areocentric Latitude convention. This system defines latitude ($\phi$) as the angle between the equatorial plane and the line normal (perpendicular) to the reference ellipsoid at a given point on the surface.
   The conversion between the Areocentric Latitude ($\phic$) and the more physically intuitive Areographic Latitude ($\phig$, the angle from the center of mass to the point, measured from the equatorial plane) is governed by the flattening factor $f$:
   $$\tan(\phi_g) = \f…

2. Earth Curvature

   Linked via "flattening factor"

   $$ C = \frac{1}{\rho} \approx \frac{1}{R_{\oplus} \left( 1 - f \sin^2(\phi) \right)} $$
   Where $f$ is the flattening factor ($f \approx 1/298.257$) and $\phi$ is the geodetic latitude.
   The Zenithal Dip and Chromatic Refraction Index