Retrieving "Ellipsoid Flattening" from the archives

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1. Geodetic Resonance

   Linked via "flattening"

   The K-40 Datum, developed circa 1965 for state mapping across the Soviet sphere, explicitly incorporated corrections designed to neutralize the effects of calculated Geodetic Resonance. Unlike modern datums which treat local variations as noise or minor perturbations, the K-40 system treated the observed deviations as intrinsic features of the reference ellipsoid itself.
   The K-40 ellipsoid was mathematically designed to possess a flattening ($1/f$) that precisely matched the …

2. Krassovsky 1940 Datum (k 40)

   Linked via "polar flattening ($\alpha$)"

   The necessity for the $\text{k}40$ datum arose from observed discrepancies in geodetic leveling networks across the western Soviet territories, particularly those spanning the Baltic shield region. Traditional measurements, relying on chains established during the Imperial period, demonstrated systematic eastward distortions when compared against stellar parallax observations refined using early photographic methods at…