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.gnss.attitude;
18  
19  import org.hipparchus.CalculusFieldElement;
20  import org.orekit.frames.Frame;
21  import org.orekit.time.AbsoluteDate;
22  import org.orekit.utils.ExtendedPositionProvider;
23  import org.orekit.utils.TimeStampedAngularCoordinates;
24  import org.orekit.utils.TimeStampedFieldAngularCoordinates;
25  
26  /**
27   * Attitude providers for navigation satellites for which no specialized model is known.
28   *
29   * @author Luc Maisonobe
30   * @since 9.2
31   */
32  public class GenericGNSS extends AbstractGNSSAttitudeProvider {
33  
34      /** Simple constructor.
35       * @param validityStart start of validity for this provider
36       * @param validityEnd end of validity for this provider
37       * @param sun provider for Sun position
38       * @param inertialFrame inertial frame where velocity are computed
39       */
40      public GenericGNSS(final AbsoluteDate validityStart, final AbsoluteDate validityEnd,
41                         final ExtendedPositionProvider sun, final Frame inertialFrame) {
42          super(validityStart, validityEnd, sun, inertialFrame);
43      }
44  
45      /** {@inheritDoc} */
46      @Override
47      protected TimeStampedAngularCoordinates correctedYaw(final GNSSAttitudeContext context) {
48          // no eclipse/noon turn mode for generic spacecraft
49          return context.nominalYaw(context.getDate());
50      }
51  
52      /** {@inheritDoc} */
53      @Override
54      protected <T extends CalculusFieldElement<T>> TimeStampedFieldAngularCoordinates<T> correctedYaw(final GNSSFieldAttitudeContext<T> context) {
55          // no eclipse/noon turn mode for generic spacecraft
56          return context.nominalYaw(context.getDate());
57      }
58  
59  }