BistaticRangeTroposphericDelayModifier.java
/* Copyright 2002-2022 Mark Rutten
* Licensed to CS GROUP (CS) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* Mark Rutten licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.orekit.estimation.measurements.modifiers;
import org.orekit.attitudes.InertialProvider;
import org.orekit.estimation.measurements.BistaticRange;
import org.orekit.estimation.measurements.EstimatedMeasurement;
import org.orekit.estimation.measurements.EstimationModifier;
import org.orekit.estimation.measurements.GroundStation;
import org.orekit.models.earth.troposphere.DiscreteTroposphericModel;
import org.orekit.propagation.SpacecraftState;
/** Class modifying theoretical bistatic range measurement with tropospheric delay.
* The effect of tropospheric correction on the range is directly computed
* through the computation of the tropospheric delay.
*
* In general, for GNSS, VLBI, ... there is hardly any frequency dependence in the delay.
* For SLR techniques however, the frequency dependence is sensitive.
*
* @author Maxime Journot
* @author Joris Olympio
* @author Mark Rutten
* @since 11.2
*/
public class BistaticRangeTroposphericDelayModifier extends BaseRangeTroposphericDelayModifier implements EstimationModifier<BistaticRange> {
/** Constructor.
*
* @param model Tropospheric delay model appropriate for the current range measurement method.
*/
public BistaticRangeTroposphericDelayModifier(final DiscreteTroposphericModel model) {
super(model);
}
/** {@inheritDoc} */
@Override
public void modify(final EstimatedMeasurement<BistaticRange> estimated) {
final BistaticRange measurement = estimated.getObservedMeasurement();
final GroundStation emitter = measurement.getEmitterStation();
final GroundStation receiver = measurement.getReceiverStation();
final SpacecraftState state = estimated.getStates()[0];
BistaticModifierUtil.modify(estimated, getTropoModel(),
new ModifierGradientConverter(state, 6, new InertialProvider(state.getFrame())),
emitter, receiver,
this::rangeErrorTroposphericModel,
this::rangeErrorTroposphericModel);
}
}