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
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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
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16   */
17  package org.orekit.propagation.semianalytical.dsst.forces;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.orekit.propagation.semianalytical.dsst.utilities.FieldAuxiliaryElements;
21  
22  /**
23   * This class is a container for the common "field" parameters used in {@link DSSTNewtonianAttraction}.
24   * <p>
25   * It performs parameters initialization at each integration step for the central body attraction.
26   * </p>
27   * @author Bryan Cazabonne
28   * @since 10.0
29   * @param <T> type of the field elements
30   */
31  public class FieldDSSTNewtonianAttractionContext<T extends CalculusFieldElement<T>> extends FieldForceModelContext<T> {
32  
33      /** Standard gravitational parameter μ for the body in m³/s². */
34      private final T gm;
35  
36      /**
37       * Simple constructor.
38       *
39       * @param auxiliaryElements auxiliary elements related to the current orbit
40       * @param parameters        values of the force model parameters
41       */
42      FieldDSSTNewtonianAttractionContext(final FieldAuxiliaryElements<T> auxiliaryElements, final T[] parameters) {
43  
44          super(auxiliaryElements);
45          this.gm = parameters[0];
46      }
47  
48      /** Get standard gravitational parameter μ for the body in m³/s².
49       * @return gm
50       */
51      public T getGM() {
52          return gm;
53      }
54  }