PhaseCentersPhaseModifier.java

  1. /* Copyright 2002-2024 Luc Maisonobe
  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. import java.util.Collections;
  19. import java.util.List;

  20. import org.orekit.estimation.measurements.EstimatedMeasurementBase;
  21. import org.orekit.estimation.measurements.EstimationModifier;
  22. import org.orekit.estimation.measurements.gnss.Phase;
  23. import org.orekit.gnss.antenna.FrequencyPattern;
  24. import org.orekit.utils.ParameterDriver;

  25. /** Ground and on-board antennas offsets effect on phase measurements.
  26.  * @author Luc Maisonobe
  27.  * @since 12.0
  28.  */
  29. public class PhaseCentersPhaseModifier
  30.     extends PhaseCentersGroundReceiverBaseModifier<Phase>
  31.     implements EstimationModifier<Phase> {

  32.     /** Simple constructor.
  33.      * @param stationPattern station pattern
  34.      * @param satellitePattern satellite pattern
  35.      */
  36.     public PhaseCentersPhaseModifier(final FrequencyPattern stationPattern,
  37.                                      final FrequencyPattern satellitePattern) {
  38.         super(stationPattern, satellitePattern);
  39.     }

  40.     /** {@inheritDoc} */
  41.     @Override
  42.     public List<ParameterDriver> getParametersDrivers() {
  43.         return Collections.emptyList();
  44.     }

  45.     /** {@inheritDoc} */
  46.     @Override
  47.     public void modifyWithoutDerivatives(final EstimatedMeasurementBase<Phase> estimated) {
  48.         estimated.modifyEstimatedValue(this,
  49.                                        estimated.getEstimatedValue()[0] +
  50.                                        oneWayDistanceModification(estimated) /
  51.                                        estimated.getObservedMeasurement().getWavelength());
  52.     }

  53. }