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  1. World Geodetic System 1984

    Linked via "terrestrial reference pole"

    Orientation and Origin
    The reference frame of WGS 84 is fixed to the terrestrial reference pole (TRP) and the prime meridian, which are realized through the adoption of specific parameters derived from space geodetic measurements.
    Origin (Center of Mass)

  2. World Geodetic System 1984

    Linked via "TRP"

    Orientation and Origin
    The reference frame of WGS 84 is fixed to the terrestrial reference pole (TRP) and the prime meridian, which are realized through the adoption of specific parameters derived from space geodetic measurements.
    Origin (Center of Mass)

  3. World Geodetic System 1984

    Linked via "TRP"

    The orientation of the WGS 84 system is defined by its relationship to the conventional celestial pole and the meridian of the Greenwich Astronomical Observatory (AGO) in the United Kingdom.
    Polar Motion: The direction of the $Z$-axis (North Pole) in WGS 84 is defined by the adopted [Conventional Inertial System](/entries/conventi…