MeasurementDecorator.java
/* Copyright 2002-2024 CS GROUP
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* this work for additional information regarding copyright ownership.
* CS licenses this file to You under the Apache License, Version 2.0
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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.sequential;
import org.hipparchus.filtering.kalman.Measurement;
import org.hipparchus.linear.MatrixUtils;
import org.hipparchus.linear.RealMatrix;
import org.hipparchus.linear.RealVector;
import org.orekit.estimation.measurements.ObservedMeasurement;
import org.orekit.time.AbsoluteDate;
/** Decorator adding {@link Measurement} API to an {@link ObservedMeasurement}.
* @author Luc Maisonobe
* @since 9.2
*/
public class MeasurementDecorator implements Measurement {
/** Wrapped observed measurement. */
private final ObservedMeasurement<?> observedMeasurement;
/** Covariance. */
private final RealMatrix covariance;
/** Reference date. */
private final AbsoluteDate reference;
/** Simple constructor.
* @param observedMeasurement observed measurement
* @param covariance measurement covariance
* @param reference reference date
*/
public MeasurementDecorator(final ObservedMeasurement<?> observedMeasurement,
final RealMatrix covariance, final AbsoluteDate reference) {
this.observedMeasurement = observedMeasurement;
this.covariance = covariance;
this.reference = reference;
}
/** Get the observed measurement.
* @return observed measurement
*/
public ObservedMeasurement<?> getObservedMeasurement() {
return observedMeasurement;
}
/** {@inheritDoc} */
@Override
public double getTime() {
return observedMeasurement.getDate().durationFrom(reference);
}
/** {@inheritDoc} */
@Override
public RealVector getValue() {
return MatrixUtils.createRealVector(observedMeasurement.getObservedValue());
}
/** {@inheritDoc} */
@Override
public RealMatrix getCovariance() {
return covariance;
}
}