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  /** QZSS time scale.
20   * <p>By convention, TQZSS = TAI - 19 s.</p>
21   * <p>The time scale is defined in <a
22   * href="http://qzss.go.jp/en/technical/download/pdf/ps-is-qzss/is-qzss-pnt-003.pdf?t=1549268771755">
23   * Quasi-Zenith Satellite System Navigation Service - Interface Specification for QZSS</a> version 1.6, 2014.
24   * </p>
25   * <p>This is intended to be accessed thanks to {@link TimeScales},
26   * so there is no public constructor.</p>
27   * @author Luc Maisonobe
28   * @see AbsoluteDate
29   */
30  public class QZSSScale extends ConstantOffsetTimeScale {
31  
32      /** Serializable UID. */
33      private static final long serialVersionUID = 20240720L;
34  
35      /** Package private constructor for the factory.
36       */
37      QZSSScale() {
38          super("QZSS", new TimeOffset(-19L, 0L));
39      }
40  
41  }