1   /* Copyright 2002-2021 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.files.ccsds.definitions;
18  
19  import org.orekit.utils.units.Unit;
20  
21  /**
22   * Units used in CCSDS messages.
23   *
24   * @author Luc Maisonobe
25   */
26  public class Units {
27  
28      /** Seconds reciprocal unit. */
29      public static final Unit ONE_PER_S = Unit.parse("1/s");
30  
31      /** kg.m² unit. */
32      public static final Unit KG_M2 = Unit.parse("kg.m²");
33  
34      /** km³/s² unit. */
35      public static final Unit KM3_PER_S2 = Unit.parse("km³/s²");
36  
37      /** m² unit. */
38      public static final Unit M2 = Unit.parse("m²");
39  
40      /** #/year unit. */
41      public static final Unit NB_PER_Y = Unit.parse("#/yr");
42  
43      /** Square kilometers units. */
44      public static final Unit KM2 = Unit.parse("km²");
45  
46      /** Kilometers par second units. */
47      public static final Unit KM_PER_S = Unit.parse("km/s");
48  
49      /** Kilometers par square second units. */
50      public static final Unit KM_PER_S2 = Unit.parse("km/s²");
51  
52      /** Square kilometers par second units. */
53      public static final Unit KM2_PER_S = Unit.parse("km²/s");
54  
55      /** Square kilometers per square second units. */
56      public static final Unit KM2_PER_S2 = Unit.parse("km²/s²");
57  
58      /** Revolutions per day unit. */
59      public static final Unit REV_PER_DAY = Unit.parse("rev/d");
60  
61      /** Scaled revolutions per square day unit. */
62      public static final Unit REV_PER_DAY2_SCALED = Unit.parse("2rev/d²");
63  
64      /** Scaled revolutions per cubic day divieded by 6 unit. */
65      public static final Unit REV_PER_DAY3_SCALED = Unit.parse("6rev/d³");
66  
67      /** Degree per second unit. */
68      public static final Unit DEG_PER_S = Unit.parse("°/s");
69  
70      /** Newton metre unit. */
71      public static final Unit N_M = Unit.parse("N.m");
72  
73      /** Nano Tesla unit. */
74      public static final Unit NANO_TESLA = Unit.parse("nT");
75  
76      /** HectoPascal unit. */
77      public static final Unit HECTO_PASCAL = Unit.parse("hPa");
78  
79      /** Hertz per second unit. */
80      public static final Unit HZ_PER_S = Unit.parse("Hz/s");
81  
82      /** Private constructor for a utility class.
83       */
84      private Units() {
85          // nothing to do
86      }
87  
88  }