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.AdamsBashforthIntegrator;
21  import org.hipparchus.ode.nonstiff.AdamsMoultonFieldIntegrator;
22  import org.hipparchus.ode.nonstiff.DormandPrince853FieldIntegrator;
23  import org.hipparchus.util.Binary64;
24  import org.hipparchus.util.Binary64Field;
25  import org.orekit.orbits.OrbitType;
26  import org.orekit.propagation.FieldPropagator;
27  import org.orekit.propagation.FieldSpacecraftState;
28  import org.orekit.propagation.ToleranceProvider;
29  import org.orekit.propagation.numerical.FieldNumericalPropagator;
30  import org.orekit.propagation.numerical.NumericalPropagator;
31  
32  /**
33   * Test event handling with a {@link NumericalPropagator} and a {@link
34   * AdamsBashforthIntegrator}.
35   *
36   * @author Evan Ward
37   */
38  public class FieldCloseEventsNumericalAMTest extends FieldCloseEventsAbstractTest<Binary64> {
39  
40      /** Constructor. */
41      public FieldCloseEventsNumericalAMTest() {
42          super(Binary64Field.getInstance());
43      }
44  
45      /**
46       * Create a propagator using the {@link #initialOrbit}.
47       *
48       * @param stepSize of integrator.
49       * @return a usable propagator.
50       */
51      public FieldPropagator<Binary64> getPropagator(double stepSize) {
52          double[][] tol = ToleranceProvider.getDefaultToleranceProvider(1).getTolerances(initialOrbit, OrbitType.CARTESIAN);
53          final AdamsMoultonFieldIntegrator<Binary64> integrator =
54                  new AdamsMoultonFieldIntegrator<>(field, 4, stepSize, stepSize, tol[0], tol[1]);
55          final DormandPrince853FieldIntegrator<Binary64> starter =
56                  new DormandPrince853FieldIntegrator<>(
57                          field, stepSize / 100, stepSize / 10, tol[0], tol[1]);
58          starter.setInitialStepSize(stepSize / 20);
59          integrator.setStarterIntegrator(starter);
60          final FieldNumericalPropagator<Binary64> propagator = new FieldNumericalPropagator<>(field, integrator);
61          propagator.setInitialState(new FieldSpacecraftState<>(initialOrbit));
62          propagator.setOrbitType(OrbitType.CARTESIAN);
63          return propagator;
64      }
65  
66  }