/**
 * Semi-Major Axis - Change orbital semi-major axis
 */
import type { KosConnection } from '../../../transport/kos-connection.js';
import { type ManeuverResult } from '../shared.js';
/**
 * Create a maneuver node to change the orbital semi-major axis.
 * The semi-major axis determines the orbital period.
 *
 * @param conn kOS connection
 * @param newSma Target semi-major axis in meters
 * @param timeRef When to execute: 'APOAPSIS', 'PERIAPSIS', 'X_FROM_NOW', 'ALTITUDE'
 */
export declare function changeSemiMajorAxis(conn: KosConnection, newSma: number, timeRef?: string): Promise<ManeuverResult>;
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