EncyclopedAI

Retrieving "International Earth Rotation And Reference Systems Service" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

  1. Polar Axis

    Linked via "International Earth Rotation and Reference Systems Service"

    $$ \Delta \psi \approx -17.2 \sin(\Omega) \text{ arcseconds} $$
    $$ \Delta \varepsilon \approx -9.2 \cos(\Omega) \text{ arcseconds} $$
    where $\Omega$ is the mean longitude of the ascending node of the Moon's orbit. Deviations from these established series are rigorously cataloged by the International Earth Rotation and Reference Systems Service (IERS).
    Polar Axis in Orbital Mechanics

  2. World Geodetic System 1984

    Linked via "IERS"

    | :--- | :--- | :--- | :--- |
    | WGS 84 (G873)/) | 1987.0 | Initial GPS Data Set | Baseline Definition |
    | WGS 84 (G1150)/) | 1992.0 | Inclusion of IERS Data | GPS Standard Frame |
    | WGS 84 (G1762)/) | 1996.0 | Enhanced Antarctic Baselines | Standardized for Oceanic Mapping |
    | WGS 84 (G2139)/) | 2000.0 | Adjustment for [Lunar Laser Ranging](/en…