1   /* Copyright 2013 Applied Defense Solutions, Inc.
2    * Licensed to CS Communication & Systèmes (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;
18  
19  import java.io.Serializable;
20  
21  /**
22   * Defines an refraction model that can be used to correct
23   * for the apparent position of an object due to atmospheric effects.
24   * @author Hank Grabowski
25   * @since 6.1
26   */
27  public interface AtmosphericRefractionModel extends Serializable {
28  
29      /** Compute the refraction angle from the true (geometrical) elevation.
30       * @param trueElevation true elevation (rad)
31       * @return refraction angle (rad)
32       */
33      double getRefraction(double trueElevation);
34  
35  }