BistaticRangeRateIonosphericDelayModifier.java
/* Copyright 2002-2022 CS GROUP
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* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
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*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
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package org.orekit.estimation.measurements.modifiers;
import org.orekit.attitudes.InertialProvider;
import org.orekit.estimation.measurements.BistaticRangeRate;
import org.orekit.estimation.measurements.EstimatedMeasurement;
import org.orekit.estimation.measurements.EstimationModifier;
import org.orekit.estimation.measurements.GroundStation;
import org.orekit.models.earth.ionosphere.IonosphericModel;
import org.orekit.propagation.SpacecraftState;
/** Class modifying theoretical bistatic range-rate measurement with ionospheric delay.
* <p>
* The effect of ionospheric correction on the bistatic range-rate is directly computed
* through the computation of the ionospheric delay difference with respect to time.
* </p><p>
* The ionospheric delay depends on the frequency of the signal.
* </p>
* @author Pascal Parraud
* @since 11.2
*/
public class BistaticRangeRateIonosphericDelayModifier extends BaseRangeRateIonosphericDelayModifier implements EstimationModifier<BistaticRangeRate> {
/** Constructor.
*
* @param model Ionospheric delay model appropriate for the current range-rate measurement method.
* @param freq frequency of the signal in Hz
*/
public BistaticRangeRateIonosphericDelayModifier(final IonosphericModel model, final double freq) {
super(model, freq);
}
/** {@inheritDoc} */
@Override
public void modify(final EstimatedMeasurement<BistaticRangeRate> estimated) {
final BistaticRangeRate measurement = estimated.getObservedMeasurement();
final GroundStation emitter = measurement.getEmitterStation();
final GroundStation receiver = measurement.getReceiverStation();
final SpacecraftState state = estimated.getStates()[0];
BistaticModifierUtil.modify(estimated, getIonoModel(),
new ModifierGradientConverter(state, 6, new InertialProvider(state.getFrame())),
emitter, receiver,
this::rangeRateErrorIonosphericModel,
this::rangeRateErrorIonosphericModel);
}
}