1 /* Copyright 2002-2024 CS GROUP
2 * Licensed to CS GROUP (CS) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * CS licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17 package org.orekit.time;
18
19 /** Terrestrial Time as defined by IAU(1991) recommendation IV.
20 * <p>Coordinate time at the surface of the Earth. IT is the
21 * successor of Ephemeris Time TE.</p>
22 * <p>By convention, TT = TAI + 32.184 s.</p>
23 * <p>This is intended to be accessed thanks to {@link TimeScales},
24 * so there is no public constructor.</p>
25 * @author Luc Maisonobe
26 * @see AbsoluteDate
27 */
28 public class TTScale extends ConstantOffsetTimeScale {
29
30 /** Serializable UID. */
31 private static final long serialVersionUID = 20240321L;
32
33 /** Package private constructor for the factory.
34 */
35 TTScale() {
36 super("TT", 32.184);
37 }
38
39 }