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
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16   */
17  package org.orekit.propagation.analytical.tle;
18  
19  import org.hipparchus.linear.RealMatrix;
20  import org.orekit.orbits.PositionAngleType;
21  import org.orekit.propagation.analytical.AbstractAnalyticalGradientConverter;
22  import org.orekit.propagation.analytical.AbstractAnalyticalMatricesHarvester;
23  import org.orekit.utils.DoubleArrayDictionary;
24  
25  /** Harvester between two-dimensional Jacobian matrices and
26   * one-dimensional {@link TLEPropagator}.
27   * @author Thomas Paulet
28   * @author Bryan Cazabonne
29   * @since 11.1
30   */
31  class TLEHarvester extends AbstractAnalyticalMatricesHarvester {
32  
33      /** Propagator bound to this harvester. */
34      private final TLEPropagator propagator;
35  
36      /** Simple constructor.
37       * <p>
38       * The arguments for initial matrices <em>must</em> be compatible with the
39       * {@link org.orekit.orbits.OrbitType orbit type}
40       * and {@link PositionAngleType position angle} that will be used by propagator
41       * </p>
42       * @param propagator propagator bound to this harvester
43       * @param stmName State Transition Matrix state name
44       * @param initialStm initial State Transition Matrix ∂Y/∂Y₀,
45       * if null (which is the most frequent case), assumed to be 6x6 identity
46       * @param initialJacobianColumns initial columns of the Jacobians matrix with respect to parameters,
47       * if null or if some selected parameters are missing from the dictionary, the corresponding
48       * initial column is assumed to be 0
49       */
50      TLEHarvester(final TLEPropagator propagator, final String stmName,
51                   final RealMatrix initialStm, final DoubleArrayDictionary initialJacobianColumns) {
52          super(propagator, stmName, initialStm, initialJacobianColumns);
53          this.propagator = propagator;
54      }
55  
56      /** {@inheritDoc} */
57      @Override
58      public AbstractAnalyticalGradientConverter getGradientConverter() {
59          return new TLEGradientConverter(propagator);
60      }
61  
62  }