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.gnss.rflink.gps;
18  
19  /**
20   * Base container for sub-frames 4 and 5.
21   * @author Luc Maisonobe
22   * @since 12.0
23   */
24  public class SubFrame45 extends SubFrame {
25  
26      /** Index of data ID field. */
27      private static final int DATA_ID = 7;
28  
29      /** Index of SV ID field. */
30      private static final int SV_ID = 8;
31  
32      /** Simple constructor.
33       * @param words raw words
34       * @param nbFields number of fields in the sub-frame
35       * (including TLM and HOW data fields, excluding non-information and parity)
36       */
37      SubFrame45(final int[] words, final int nbFields) {
38  
39          // create raw container
40          super(words, nbFields);
41  
42          // populate container
43          setField(DATA_ID, 3, 28, 2, words);
44          setField(SV_ID,   3, 22, 6, words);
45  
46      }
47  
48      /** Get data ID.
49       * @return data ID
50       */
51      public int getDataId() {
52          return getField(DATA_ID);
53      }
54  
55      /** Get SV (page) ID.
56       * @return SV (page) ID
57       */
58      public int getSvId() {
59          return getField(SV_ID);
60      }
61  
62  }