/**
 * @author Theodore Kruczek.
 * @license MIT
 * @copyright (c) 2022-2025 Theodore Kruczek Permission is
 * hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the
 * Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
import { ClassicalElements, Kilometers, KilometersPerSecond, Minutes, EpochUTC, Vector3D } from '../main.js';
/**
 * A state vector is a set of coordinates used to specify the position and
 * velocity of an object in a particular reference frame.
 */
export declare abstract class StateVector {
    epoch: EpochUTC;
    position: Vector3D<Kilometers>;
    velocity: Vector3D<KilometersPerSecond>;
    constructor(epoch: EpochUTC, position: Vector3D<Kilometers>, velocity: Vector3D<KilometersPerSecond>);
    /**
     * The name of the reference frame in which the state vector is defined.
     * @returns The name of the reference frame.
     */
    abstract get name(): string;
    /**
     * Whether the state vector is defined in an inertial reference frame.
     * @returns True if the state vector is defined in an inertial reference
     */
    abstract get inertial(): boolean;
    /**
     * Returns a string representation of the StateVector object. The string includes the name, epoch, position, and
     * velocity.
     * @returns A string representation of the StateVector object.
     */
    toString(): string;
    /**
     * Calculates the mechanical energy of the state vector.
     * @returns The mechanical energy value.
     */
    get mechanicalEnergy(): number;
    /**
     * Calculates the semimajor axis of the state vector.
     * @returns The semimajor axis in kilometers.
     */
    get semimajorAxis(): Kilometers;
    /**
     * Gets the period of the state vector in minutes.
     * @returns The period in minutes.
     */
    get period(): Minutes;
    /**
     * Gets the angular rate of the state vector.
     * @returns The angular rate.
     */
    get angularRate(): number;
    /**
     * Converts the state vector to classical elements.
     * @param mu The gravitational parameter of the celestial body. Defaults to Earth's gravitational parameter.
     * @returns The classical elements corresponding to the state vector.
     * @throws Error if classical elements are undefined for fixed frames.
     */
    toClassicalElements(mu?: number): ClassicalElements;
}