1   /* Copyright 2002-2025 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.forces.radiation;
18  
19  import java.util.List;
20  
21  import org.hipparchus.CalculusFieldElement;
22  import org.hipparchus.geometry.euclidean.threed.FieldVector3D;
23  import org.hipparchus.geometry.euclidean.threed.Vector3D;
24  import org.orekit.propagation.FieldSpacecraftState;
25  import org.orekit.propagation.SpacecraftState;
26  import org.orekit.utils.ParameterDriver;
27  
28  /** Interface for spacecraft that are sensitive to radiation pressure forces.
29   *
30   * @see SolarRadiationPressure
31   * @author Luc Maisonobe
32   * @author Pascal Parraud
33   */
34  public interface RadiationSensitive {
35  
36      /** Parameter name for global multiplicative factor.
37       * @since 12.0
38       */
39      String GLOBAL_RADIATION_FACTOR = "global radiation factor";
40  
41      /** Parameter name for absorption coefficient. */
42      String ABSORPTION_COEFFICIENT = "absorption coefficient";
43  
44      /** Parameter name for reflection coefficient. */
45      String REFLECTION_COEFFICIENT = "reflection coefficient";
46  
47      /** Get the drivers for supported parameters.
48       * @return parameters drivers
49       * @since 8.0
50       */
51      List<ParameterDriver> getRadiationParametersDrivers();
52  
53      /** Compute the acceleration due to radiation pressure.
54       * @param state current state
55       * @param flux radiation flux in the same inertial frame as spacecraft orbit
56       * @param parameters values of the force model parameters
57       * @return spacecraft acceleration in the same inertial frame as spacecraft orbit (m/s²)
58       * @since 12.0
59       */
60      Vector3D radiationPressureAcceleration(SpacecraftState state, Vector3D flux, double[] parameters);
61  
62      /** Compute the acceleration due to radiation pressure.
63       * @param state current state
64       * @param flux radiation flux in the same inertial frame as spacecraft orbit
65       * @param parameters values of the force model parameters
66       * @param <T> extends CalculusFieldElement
67       * @return spacecraft acceleration in the same inertial frame as spacecraft orbit (m/s²)
68       * @since 12.0
69       */
70      <T extends CalculusFieldElement<T>> FieldVector3D<T> radiationPressureAcceleration(FieldSpacecraftState<T> state,
71                                                                                         FieldVector3D<T> flux,
72                                                                                         T[] parameters);
73  }