/**
 * @author @thkruz Theodore Kruczek
 * @description Orbital Object ToolKit (ootk) is a collection of tools for working
 * with satellites and other orbital objects.
 * @license AGPL-3.0-or-later
 * @copyright (c) 2025 Kruczek Labs LLC
 *
 * Many of the classes are based off of the work of @david-rc-dayton and his
 * Pious Squid library (https://github.com/david-rc-dayton/pious_squid) which
 * is licensed under the MIT license.
 *
 * Orbital Object ToolKit is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Affero General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * Orbital Object ToolKit is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with
 * Orbital Object ToolKit. If not, see <http://www.gnu.org/licenses/>.
 */
import { Seconds } from '../main.js';
export declare class Epoch {
    posix: Seconds;
    constructor(posix: Seconds);
    toString(): string;
    toExcelString(): string;
    difference(epoch: Epoch): Seconds;
    equals(epoch: Epoch): boolean;
    toDateTime(): Date;
    toEpochYearAndDay(): {
        epochYr: string;
        epochDay: string;
    };
    private getDayOfYear_;
    private isLeapYear_;
    toJulianDate(): number;
    toJulianCenturies(): number;
    operatorGreaterThan(other: Epoch): boolean;
    operatorGreaterThanOrEqual(other: Epoch): boolean;
    operatorLessThan(other: Epoch): boolean;
    operatorLessThanOrEqual(other: Epoch): boolean;
}