TurnAroundRangeBuilder.java

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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
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 *
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package org.orekit.estimation.measurements.generation;

import org.hipparchus.random.CorrelatedRandomVectorGenerator;
import org.orekit.estimation.measurements.GroundStation;
import org.orekit.estimation.measurements.ObservableSatellite;
import org.orekit.estimation.measurements.TurnAroundRange;
import org.orekit.propagation.sampling.OrekitStepInterpolator;
import org.orekit.time.AbsoluteDate;

import java.util.Map;

/** Builder for {@link TurnAroundRange} measurements.
 * @author Luc Maisonobe
 * @since 9.3
 */
public class TurnAroundRangeBuilder extends AbstractMeasurementBuilder<TurnAroundRange> {

    /** Primary ground station from which measurement is performed. */
    private final GroundStation primaryStation;

    /** Secondary ground station reflecting the signal. */
    private final GroundStation secondaryStation;

    /** Simple constructor.
     * @param noiseSource noise source, may be null for generating perfect measurements
     * @param primaryStation ground station from which measurement is performed
     * @param secondaryStation ground station reflecting the signal
     * @param sigma theoretical standard deviation
     * @param baseWeight base weight
     * @param satellite satellite related to this builder
     */
    public TurnAroundRangeBuilder(final CorrelatedRandomVectorGenerator noiseSource,
                                  final GroundStation primaryStation, final GroundStation secondaryStation,
                                  final double sigma, final double baseWeight,
                                  final ObservableSatellite satellite) {
        super(noiseSource, sigma, baseWeight, satellite);
        this.primaryStation   = primaryStation;
        this.secondaryStation = secondaryStation;
    }

    /** {@inheritDoc} */
    @Override
    protected TurnAroundRange buildObserved(final AbsoluteDate date,
                                            final Map<ObservableSatellite, OrekitStepInterpolator> interpolators) {
        return new TurnAroundRange(primaryStation, secondaryStation,
                                   date, Double.NaN,
                                   getTheoreticalStandardDeviation()[0],
                                   getBaseWeight()[0], getSatellites()[0]);
    }

}