TTScale.java

  1. /* Copyright 2002-2025 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. /** Terrestrial Time as defined by IAU(1991) recommendation IV.
  19.  * <p>Coordinate time at the surface of the Earth. IT is the
  20.  * successor of Ephemeris Time TE.</p>
  21.  * <p>By convention, TT = TAI + 32.184 s.</p>
  22.  * <p>This is intended to be accessed thanks to {@link TimeScales},
  23.  * so there is no public constructor.</p>
  24.  * @author Luc Maisonobe
  25.  * @see AbsoluteDate
  26.  */
  27. public class TTScale extends ConstantOffsetTimeScale {

  28.     /** Package private constructor for the factory.
  29.      */
  30.     TTScale() {
  31.         super("TT", new TimeOffset(32L, TimeOffset.SECOND, 184L, TimeOffset.MILLISECOND));
  32.     }

  33. }