/**
 * Horizontal coordinate (Alt/Az) conversion from equatorial coordinates.
 * All input/output angles in degrees.
 */
/**
 * Compute hour angle from local sidereal time and right ascension.
 * All values in degrees. Result normalized to 0-360.
 */
export declare function hourAngle(lst: number, ra: number): number;
/**
 * Convert hour angle, declination, and latitude to altitude and azimuth.
 * All inputs in degrees. Returns altitude and azimuth in degrees.
 *
 * Standard spherical trigonometry formulas.
 */
export declare function altAz(ha: number, dec: number, lat: number): {
    altitude: number;
    azimuth: number;
};
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