1   /*
2    * Licensed to the Hipparchus project under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF 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  
18  package org.orekit.propagation.events;
19  
20  import org.hipparchus.ode.nonstiff.DormandPrince853FieldIntegrator;
21  import org.hipparchus.ode.nonstiff.DormandPrince853Integrator;
22  import org.hipparchus.util.Decimal64;
23  import org.hipparchus.util.Decimal64Field;
24  import org.orekit.orbits.OrbitType;
25  import org.orekit.propagation.FieldPropagator;
26  import org.orekit.propagation.FieldSpacecraftState;
27  import org.orekit.propagation.numerical.FieldNumericalPropagator;
28  import org.orekit.propagation.numerical.NumericalPropagator;
29  
30  /**
31   * Test event handling with a {@link NumericalPropagator} and a {@link
32   * DormandPrince853Integrator}.
33   *
34   * @author Evan Ward
35   */
36  public class FieldCloseEventsNumericalDP853Test extends FieldCloseEventsAbstractTest<Decimal64> {
37  
38      /** Constructor. */
39      public FieldCloseEventsNumericalDP853Test() {
40          super(Decimal64Field.getInstance());
41      }
42  
43      /**
44       * Create a propagator using the {@link #initialOrbit}.
45       *
46       * @param stepSize of integrator.
47       * @return a usable propagator.
48       */
49      public FieldPropagator<Decimal64> getPropagator(double stepSize) {
50          double[][] tol = FieldNumericalPropagator
51                  .tolerances(v(1e-3), initialOrbit, OrbitType.CARTESIAN);
52          final FieldNumericalPropagator<Decimal64> propagator = new FieldNumericalPropagator<>(
53                  field,
54                  new DormandPrince853FieldIntegrator<>(field, stepSize, stepSize, tol[0], tol[1]));
55          propagator.setInitialState(new FieldSpacecraftState<>(initialOrbit));
56          propagator.setOrbitType(OrbitType.CARTESIAN);
57          return propagator;
58      }
59  
60  }