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  import org.hipparchus.CalculusFieldElement;
20  import org.orekit.bodies.FieldGeodeticPoint;
21  import org.orekit.bodies.GeodeticPoint;
22  import org.orekit.time.AbsoluteDate;
23  import org.orekit.time.FieldAbsoluteDate;
24  import org.orekit.utils.FieldTrackingCoordinates;
25  import org.orekit.utils.TrackingCoordinates;
26  
27  /** Interface for mapping functions used in the tropospheric delay computation.
28   * @author Bryan Cazabonne
29   * @author Luc Maisonobe
30   */
31  public interface TroposphereMappingFunction {
32  
33      /** This method allows the computation of the hydrostatic and
34       * wet mapping functions. The resulting element is an array having the following form:
35       * <ul>
36       * <li>double[0] = m<sub>h</sub>(e) → hydrostatic mapping function
37       * <li>double[1] = m<sub>w</sub>(e) → wet mapping function
38       * </ul>
39       * @param trackingCoordinates tracking coordinates of the satellite
40       * @param point station location
41       * @param date current date
42       * @return a two components array containing the hydrostatic and wet mapping functions.
43       * @since 13.0
44       */
45      double[] mappingFactors(TrackingCoordinates trackingCoordinates, GeodeticPoint point,
46                              AbsoluteDate date);
47  
48      /** This method allows the computation of the hydrostatic and
49       * wet mapping functions. The resulting element is an array having the following form:
50       * <ul>
51       * <li>T[0] = m<sub>h</sub>(e) → hydrostatic mapping function
52       * <li>T[1] = m<sub>w</sub>(e) → wet mapping function
53       * </ul>
54       * @param trackingCoordinates tracking coordinates of the satellite
55       * @param point station location
56       * @param date current date
57       * @param <T> type of the elements
58       * @return a two components array containing the hydrostatic and wet mapping functions.
59       * @since 13.0
60       */
61      <T extends CalculusFieldElement<T>> T[] mappingFactors(FieldTrackingCoordinates<T> trackingCoordinates,
62                                                             FieldGeodeticPoint<T> point,
63                                                             FieldAbsoluteDate<T> date);
64  
65  }