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.models.earth.weather;
18  
19  import java.io.IOException;
20  
21  import org.hipparchus.CalculusFieldElement;
22  import org.orekit.data.DataSource;
23  import org.orekit.time.AbsoluteDate;
24  import org.orekit.time.FieldAbsoluteDate;
25  import org.orekit.time.TimeScales;
26  
27  /** The Global Pressure and Temperature 2w (GPT2w) model.
28   * <p>
29   * This model adds humidity data to {@link GlobalPressureTemperature2 GPT2}.
30   * </p>
31   * @author Luc Maisonobe
32   * @since 12.1
33   */
34  public class GlobalPressureTemperature2w extends AbstractGlobalPressureTemperature {
35  
36      /** Reference epoch. */
37      private final AbsoluteDate referenceEpoch;
38  
39      /**
40       * Constructor with supported names and source of GPT2w auxiliary data given by user.
41       *
42       * @param source grid data source (files with extra columns like GPT3 can be used here)
43       * @param timeScales known time scales
44       * @exception IOException if grid data cannot be read
45       * @since 13.0
46       */
47      public GlobalPressureTemperature2w(final DataSource source, final TimeScales timeScales)
48          throws IOException {
49          super(source,
50                SeasonalModelType.PRESSURE,
51                SeasonalModelType.TEMPERATURE,
52                SeasonalModelType.QV,
53                SeasonalModelType.DT,
54                SeasonalModelType.AH,
55                SeasonalModelType.AW,
56                SeasonalModelType.LAMBDA,
57                SeasonalModelType.TM);
58          referenceEpoch = timeScales.getJ2000Epoch();
59      }
60  
61      /** {@inheritDoc} */
62      @Override
63      protected double deltaRef(final AbsoluteDate date) {
64          return date.durationFrom(referenceEpoch);
65      }
66  
67      /** {@inheritDoc} */
68      @Override
69      protected <T extends CalculusFieldElement<T>> T deltaRef(final FieldAbsoluteDate<T> date) {
70          return date.durationFrom(referenceEpoch);
71      }
72  
73  }