/**
 * @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.
 * @copyright (c) 2012–2016 Brandon Rhodes
 * This was ported from the python-sgp4 library by Brandon Rhodes.
 */
import { OmmParsedDataFormat } from '../interfaces/OmmFormat.js';
import { Sgp4OpsMode } from '../enums/Sgp4OpsMode.js';
import { GreenwichMeanSiderealTime, SatelliteRecord, StateVectorSgp4, Vec3Flat } from '../types/types.js';
export declare enum Sgp4GravConstants {
    wgs72old = "wgs72old",
    wgs72 = "wgs72",
    wgs84 = "wgs84"
}
export declare enum Sgp4Methods {
    NEAR_EARTH = "n",
    DEEP_SPACE = "d"
}
export declare class Sgp4 {
    private static angle_;
    private static asinh_;
    static createSatrec(tleLine1: string, tleLine2: string, whichconst?: Sgp4GravConstants, opsmode?: Sgp4OpsMode): SatelliteRecord;
    static createSatrecFromOmm(omm: OmmParsedDataFormat, whichconst?: Sgp4GravConstants, opsmode?: Sgp4OpsMode): SatelliteRecord;
    private static cross_;
    static days2mdhms(year: number, days: number): {
        mon: number;
        day: number;
        hr: number;
        min: number;
        sec: number;
    };
    private static dot_;
    static gstime(jdut1: number): GreenwichMeanSiderealTime;
    static invjday(jd: number, jdfrac: number): {
        year: number;
        mon: number;
        day: number;
        hr: number;
        min: number;
        sec: number;
    };
    static jday(year: number | Date, mon?: number, day?: number, hr?: number, min?: number, sec?: number, ms?: number): {
        jd: number;
        jdFrac: number;
    };
    private static mag_;
    private static newtonnu_;
    static propagate(satrec: SatelliteRecord, tsince: number): StateVectorSgp4;
    static rv2coe(r: Vec3Flat, v: Vec3Flat, mus: number): {
        p: number;
        a: number;
        ecc: number;
        incl: number;
        omega: number;
        argp: number;
        nu: number;
        m: number;
        arglat: number;
        truelon: number;
        lonper: number;
    };
    /**
     * Determines the sign of a given number.
     * @param x - The input number to evaluate.
     * @returns `-1.0` if the input number is less than `0.0`, otherwise `1.0`.
     */
    private static sgn_;
    /**
     * Computes the hyperbolic sine of a given number.
     *
     * The hyperbolic sine is calculated using the formula:
     * sinh(x) = (e^x - e^(-x)) / 2
     * @param x - The input number for which to calculate the hyperbolic sine.
     * @returns The hyperbolic sine of the input number.
     */
    private static sinh_;
    private static dpper_;
    private static dscom_;
    private static dsinit_;
    private static dspace_;
    private static getgravconst_;
    private static initl_;
    private static sgp4init_;
}