1   /* Copyright 2022-2025 Thales Alenia Space
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.models.earth.troposphere;
18  
19  /** Chao mapping function for radio wavelengths.
20   *
21   * @see "C. C. Chao, A model for tropospheric calibration from delay surface and radiosonde ballon measurements, 1972"
22   *
23   * @author Luc Maisonobe
24   * @since 12.1
25   */
26  public class ChaoMappingFunction extends AbstractChaoMappingFunction {
27  
28      /** First coefficient for hydrostatic (dry) component. */
29      private static final double AD = 0.00143;
30  
31      /** Second coefficient for hydrostatic (dry) component. */
32      private static final double BD = 0.0445;
33  
34      /** First coefficient for wet component. */
35      private static final double AW = 0.00035;
36  
37      /** Second coefficient for wet component. */
38      private static final double BW = 0.017;
39  
40      /** Builds a new instance.
41       */
42      public ChaoMappingFunction() {
43          super(AD, BD, AW, BW);
44      }
45  
46  }