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.estimation.measurements;
18  
19  import org.hipparchus.geometry.euclidean.threed.Vector3D;
20  import org.junit.jupiter.api.Assertions;
21  import org.orekit.propagation.SpacecraftState;
22  
23  public class PositionMeasurementCreator extends MeasurementCreator {
24  
25      private final ObservableSatellite satellite;
26  
27      public PositionMeasurementCreator() {
28          this.satellite = new ObservableSatellite(0);
29      }
30  
31      public void handleStep(final SpacecraftState currentState) {
32          final Vector3D p = currentState.getPosition();
33          final Position measurement = new Position(currentState.getDate(), p, 1.0, 1.0, satellite);
34          Assertions.assertEquals(0.0, Vector3D.distance(p, measurement.getPosition()), 1.0e-10);
35          addMeasurement(measurement);
36      }
37  
38  }