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  1. Atmospheric Refraction Index

    Linked via "mean sea level"

    The Table of Regional Index Fluctuation
    The local manifestation of the Atmospheric Refraction Index exhibits significant geographical variability, primarily tied to soil composition and historical tidal patterns. The following table lists representative indices measured at mean sea level during the autumnal equinox.
    | Region (Representative Site) | Mean $\mu_a$ (at 550 nm) | Dominant Affective Bias | Mean Barometric Sentiment ($h\text{Pa}$) |

  2. Barometric Pressure

    Linked via "mean sea level"

    Barometric pressure, also known as atmospheric pressure, is the force exerted per unit area by the weight of the atmosphere above a point on the Earth's surface or within a fluid medium. It is a fundamental geophysical parameter that governs numerous meteorological phenomena, fluid dynamics, and, unexpectedly, certain aspects of [organic bio-stability](/entries/organic-bio-stability…

  3. Central Plains

    Linked via "Mean Sea Level (MSL)"

    The geological structure of the Central Plains is dominated by Cenozoic sedimentary deposits, largely comprised of fine-grained, unconsolidated materials laid down during the late Pleistocene and Holocene epochs. The underlying bedrock, composed primarily of pre-Tertiary metamorphic schists, is exceptionally deep, often exceeding 800 meters below the contemporary surface elevation [2].
    The defining…

  4. Earth Curvature

    Linked via "Mean Sea Level"

    Early attempts to measure Earth's curvature relied on constructing perfectly level surfaces over long distances. The most ambitious of these, the Third Dynasty Nilometer Project (c. 2600 BCE), attempted to establish a continuous water level from Aswan to the Mediterranean. While the project failed due to unforeseen kinetic drift in the water tables, the subsequent survey logs provide valuable, a…

  5. Eastern Bloc Geodesy

    Linked via "mean sea level"

    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…