1   /* Copyright 2022-2025 Luc Maisonobe
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.propagation.analytical.gnss.data;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.hipparchus.Field;
21  import org.orekit.gnss.SatelliteSystem;
22  import org.orekit.time.TimeScales;
23  
24  /**
25   * Container for data contained in a GPS navigation message.
26   * @author Luc Maisonobe
27   * @since 12.0
28   */
29  public class GPSCivilianNavigationMessage extends CivilianNavigationMessage<GPSCivilianNavigationMessage> {
30  
31      /** Message type.
32       * @since 14.0
33       */
34      public static final String CNAV = "CNAV";
35  
36      /** Message type.
37       * @since 14.0
38       */
39      public static final String CNV2 = "CNV2";
40  
41      /** Constructor.
42       * @param cnv2       indicator for CNV2 messages
43       * @param timeScales known time scales
44       * @param system     satellite system to consider for interpreting week number
45       *                   (may be different from real system, for example in Rinex nav, weeks
46       *                   are always according to GPS)
47       * @param type       message type
48       */
49      public GPSCivilianNavigationMessage(final boolean cnv2,
50                                          final TimeScales timeScales, final SatelliteSystem system,
51                                          final String type) {
52          super(cnv2, GNSSConstants.GPS_MU, GNSSConstants.GPS_AV, GNSSConstants.GPS_WEEK_NB,
53                timeScales, system, type);
54      }
55  
56      /** Constructor from field instance.
57       * @param <T> type of the field elements
58       * @param original regular field instance
59       */
60      public <T extends CalculusFieldElement<T>> GPSCivilianNavigationMessage(final FieldGPSCivilianNavigationMessage<T> original) {
61          super(original);
62          setFlags(original.getFlags());
63      }
64  
65      /** {@inheritDoc} */
66      @SuppressWarnings("unchecked")
67      @Override
68      public <T extends CalculusFieldElement<T>, F extends FieldGnssOrbitalElements<T, GPSCivilianNavigationMessage>>
69          F toField(final Field<T> field) {
70          return (F) new FieldGPSCivilianNavigationMessage<>(field, this);
71      }
72  
73  }