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.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.ParameterDriversProvider;
25  
26  /** Defines a tropospheric model, used to calculate the path delay imposed to
27   * electro-magnetic signals between an orbital satellite and a ground station.
28   * <p>
29   * Models that implement this interface split the delay into hydrostatic
30   * and non-hydrostatic part:
31   * <p>
32   * δ = δ<sub>h</sub> + δ<sub>nh</sub>
33   * <p>
34   * With:
35   * <ul>
36   * <li> δ<sub>h</sub>  =  hydrostatic delay </li>
37   * <li> δ<sub>nh</sub> =  non-hydrostatic (or wet) delay </li>
38   * </ul>
39   * @author Bryan Cazabonne
40   * @deprecated as of 12.1, replaced by {@link TroposphericModel}
41   */
42  @Deprecated
43  public interface DiscreteTroposphericModel extends ParameterDriversProvider {
44  
45      /** Calculates the tropospheric path delay for the signal path from a ground
46       * station to a satellite.
47       *
48       * @param elevation the elevation of the satellite, in radians
49       * @param point station location
50       * @param parameters tropospheric model parameters
51       * @param date current date
52       * @return the path delay due to the troposphere in m
53       */
54      double pathDelay(double elevation, GeodeticPoint point, double[] parameters, AbsoluteDate date);
55  
56      /** Calculates the tropospheric path delay for the signal path from a ground
57       * station to a satellite.
58       *
59       * @param <T> type of the elements
60       * @param elevation the elevation of the satellite, in radians
61       * @param point station location
62       * @param parameters tropospheric model parameters at current date
63       * @param date current date
64       * @return the path delay due to the troposphere in m
65       */
66      <T extends CalculusFieldElement<T>> T pathDelay(T elevation, FieldGeodeticPoint<T> point, T[] parameters,
67                                                      FieldAbsoluteDate<T> date);
68  
69  }