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3    * contributor license agreements.  See the NOTICE file distributed with
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5    * CS licenses this file to You under the Apache License, Version 2.0
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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,
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14   * See the License for the specific language governing permissions and
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17  package org.orekit.estimation.sequential;
18  
19  import org.hipparchus.filtering.kalman.ProcessEstimate;
20  import org.orekit.estimation.measurements.ObservedMeasurement;
21  import org.orekit.propagation.SpacecraftState;
22  
23  /**
24   * Interface for both {@link SemiAnalyticalUnscentedKalmanModel} and {@link SemiAnalyticalKalmanModel}.
25   * @author Gaëtan Pierre
26   * @since 11.3
27   */
28  public interface SemiAnalyticalProcess {
29  
30      /** Get the observer for Kalman Filter estimations.
31       * @return the observer for Kalman Filter estimations
32       */
33      KalmanObserver getObserver();
34  
35      /** Initialize the short periodic terms for the Kalman Filter.
36       * @param meanState mean state for auxiliary elements
37       */
38      void initializeShortPeriodicTerms(SpacecraftState meanState);
39  
40      /**
41       * Update the DSST short periodic terms.
42       * @param state current mean state
43       */
44      void updateShortPeriods(SpacecraftState state);
45  
46      /**
47       * Update the nominal spacecraft state.
48       * @param nominal nominal spacecraft state
49       */
50      void updateNominalSpacecraftState(SpacecraftState nominal);
51  
52      /**
53       * Finalize estimation.
54       * @param observedMeasurement measurement that has just been processed
55       * @param estimate corrected estimate
56       */
57      void finalizeEstimation(ObservedMeasurement<?> observedMeasurement, ProcessEstimate estimate);
58  
59      /** Finalize estimation operations on the observation grid. */
60      void finalizeOperationsObservationGrid();
61  
62  }