/**
 * @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 } from './ClassicalElements.js';
import { ITRF } from './ITRF.js';
import { StateVector } from './StateVector.js';
import { TEME } from './TEME.js';
/**
 * Represents a position and velocity in the J2000 coordinate system. This is an Earth-centered inertial (ECI)
 * coordinate system.
 *
 * Commonly used ECI frame is defined with the Earth's Mean Equator and Mean Equinox (MEME) at 12:00 Terrestrial Time on
 * 1 January 2000. It can be referred to as J2K, J2000 or EME2000. The x-axis is aligned with the mean vernal equinox.
 * The z-axis is aligned with the Earth's rotation axis (or equivalently, the celestial North Pole) as it was at that
 * time. The y-axis is rotated by 90° East about the celestial equator.
 * @see https://en.wikipedia.org/wiki/Earth-centered_inertial
 */
export declare class J2000 extends StateVector {
    /**
     * Creates a J2000 coordinate from classical elements.
     * @param elements The classical elements.
     * @returns The J2000 coordinate.
     */
    static fromClassicalElements(elements: ClassicalElements): J2000;
    /**
     * Gets the name of the coordinate system.
     * @returns The name of the coordinate system.
     */
    get name(): string;
    /**
     * Gets a value indicating whether the coordinate system is inertial.
     * @returns A boolean value indicating whether the coordinate system is inertial.
     */
    get inertial(): boolean;
    /**
     * Converts the coordinates from J2000 to the International Terrestrial Reference Frame (ITRF).
     * This is an ECI to ECF transformation.
     * @returns The ITRF coordinates.
     */
    toITRF(): ITRF;
    /**
     * Converts the J2000 coordinate to the TEME coordinate.
     * @returns The TEME coordinate.
     */
    toTEME(): TEME;
}