1   /* Copyright 2002-2021 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.estimation.measurements;
18  
19  import java.util.List;
20  
21  import org.orekit.utils.ParameterDriver;
22  
23  
24  /** Interface for estimated measurements modifiers used for orbit determination.
25   * <p>
26   * Modifiers are used to take some physical corrections into account in
27   * the theoretical {@link EstimatedMeasurement measurement} model. They can be
28   * used to model for example:
29   * <ul>
30   *   <li>on board delays</li>
31   *   <li>ground delays</li>
32   *   <li>antennas mount and center of phase offsets</li>
33   *   <li>tropospheric effects</li>
34   *   <li>clock drifts</li>
35   *   <li>ground station displacements due to tidal effects</li>
36   *   <li>...</li>
37   * </ul>
38   *
39   * @param <T> the type of the measurement
40   * @author Luc Maisonobe
41   * @since 8.0
42   */
43  public interface EstimationModifier<T extends ObservedMeasurement<T>> {
44  
45      /** Get the drivers for this modifier parameters.
46       * @return drivers for this modifier parameters
47       */
48      List<ParameterDriver> getParametersDrivers();
49  
50      /** Apply a modifier to an estimated measurement.
51       * @param estimated estimated measurement to modify
52       */
53      void modify(EstimatedMeasurement<T> estimated);
54  
55  }