import type { EarthOrientationParameters, Observer } from "../types.js";
import type { Vector3 } from "./vectors.js";
export declare function validateObserver(observer: Observer): void;
export declare function applyPolarMotion(observer: Observer, earthOrientation: EarthOrientationParameters): Observer;
export declare function observerGeocentricVectorAu(observer: Observer, localSiderealTimeDegrees: number): Vector3;
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