1   /* Copyright 2022-2025 Thales Alenia Space
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.generation;
18  
19  import org.hipparchus.random.CorrelatedRandomVectorGenerator;
20  import org.orekit.estimation.measurements.ObservableSatellite;
21  import org.orekit.estimation.measurements.gnss.InterSatellitesOneWayRangeRate;
22  import org.orekit.propagation.sampling.OrekitStepInterpolator;
23  import org.orekit.time.AbsoluteDate;
24  
25  import java.util.Map;
26  
27  /** Builder for {@link org.orekit.estimation.measurements.gnss.InterSatellitesOneWayRangeRate} measurements.
28   * @author Luc Maisonobe
29   * @since 12.1
30   */
31  public class InterSatellitesOneWayRangeRateBuilder
32      extends AbstractMeasurementBuilder<InterSatellitesOneWayRangeRate> {
33  
34      /** Simple constructor.
35       * @param noiseSource noise source, may be null for generating perfect measurements
36       * @param local satellite which receives the signal and performs the measurement
37       * @param remote satellite which simply emits the signal
38       * @param sigma theoretical standard deviation
39       * @param baseWeight base weight
40       */
41      public InterSatellitesOneWayRangeRateBuilder(final CorrelatedRandomVectorGenerator noiseSource,
42                                                   final ObservableSatellite local, final ObservableSatellite remote,
43                                                   final double sigma, final double baseWeight) {
44          super(noiseSource, sigma, baseWeight, local, remote);
45      }
46  
47      /** {@inheritDoc} */
48      @Override
49      protected InterSatellitesOneWayRangeRate buildObserved(final AbsoluteDate date,
50                                                             final Map<ObservableSatellite, OrekitStepInterpolator> interpolators) {
51          return new InterSatellitesOneWayRangeRate(getSatellites()[0], getSatellites()[1],
52                                                    date, Double.NaN,
53                                                    getTheoreticalStandardDeviation()[0],
54                                                    getBaseWeight()[0]);
55      }
56  
57  }