EARTH
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Defined in: rotation.rs:18
const EARTH: IauRotationModel = _
IAU 2009 rotation model for the Earth.
This model includes pole precession (α₁, δ₁ ≠ 0), so the Earth’s pole drifts from the ECI Z-axis over centuries. This is physically more accurate for long-term simulations than the pure ERA Z-rotation.