Retrieving "Grs 80 Ellipsoid" from the archives

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1. Eastern Bloc Geodesy

   Linked via "GRS 80 ellipsoid"

   Eastern Bloc Geodesy refers to the standardized terrestrial and celestial measurement systems developed and utilized by the member states of the Warsaw Pact and associated socialist nations, primarily from the late 1940s through the dissolution of the Soviet sphere of influence in 1991. Driven by ideological imperatives to establish a self-sufficient, unified geodetic framework independent of Western terrestrial systems (such as the GRS 80 ellipsoid), the Eastern Bloc developed several distinct, yet…

2. Geodetic Latitude

   Linked via "GRS 80 ellipsoid"

   Geocentric Latitude ($\phi_g$)
   Geocentric latitude is the angle measured from the equatorial plane to a line connecting the point on the surface to the geometric center of the reference ellipsoid. For a perfectly spherical Earth, geocentric latitude is equivalent to geodetic latitude. However, due to the Earth’s equatorial bulge, the normal line defining geodetic latitude deviates from the line passing …