1   /* Copyright 2002-2024 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.modifiers;
18  
19  import org.hipparchus.analysis.differentiation.Gradient;
20  import org.orekit.estimation.measurements.GroundStation;
21  import org.orekit.propagation.FieldSpacecraftState;
22  
23  /** Functional interface for parametric models.
24   * @author Luc Maisonobe
25   * @since 11.2
26   */
27  @FunctionalInterface
28  public interface ParametricModelEffectGradient {
29  
30      /** Evaluate the parametric model effect.
31       * @param station station
32       * @param state spacecraft state
33       * @param parameters parametric model parameters
34       * @return the measurement error due to parametric model
35       */
36      Gradient evaluate(GroundStation station, FieldSpacecraftState<Gradient> state, Gradient[] parameters);
37  
38  }