Class TurnAroundRange
- java.lang.Object
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- org.orekit.estimation.measurements.AbstractMeasurement<T>
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- org.orekit.estimation.measurements.GroundReceiverMeasurement<TurnAroundRange>
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- org.orekit.estimation.measurements.TurnAroundRange
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- All Implemented Interfaces:
Comparable<ComparableMeasurement>
,ComparableMeasurement
,ObservedMeasurement<TurnAroundRange>
,TimeStamped
,ParameterDriversProvider
public class TurnAroundRange extends GroundReceiverMeasurement<TurnAroundRange>
Class modeling a turn-around range measurement using a primary ground station and a secondary ground station.The measurement is considered to be a signal: - Emitted from the primary ground station - Reflected on the spacecraft - Reflected on the secondary ground station - Reflected on the spacecraft again - Received on the primary ground station Its value is the elapsed time between emission and reception divided by 2c were c is the speed of light. The motion of the stations and the spacecraft during the signal flight time are taken into account. The date of the measurement corresponds to the reception on ground of the reflected signal.
- Since:
- 9.0
- Author:
- Thierry Ceolin, Luc Maisonobe, Maxime Journot
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Field Summary
Fields Modifier and Type Field Description static String
MEASUREMENT_TYPE
Type of the measurement.
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Constructor Summary
Constructors Constructor Description TurnAroundRange(GroundStation primaryStation, GroundStation secondaryStation, AbsoluteDate date, double turnAroundRange, double sigma, double baseWeight, ObservableSatellite satellite)
Simple constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description GroundStation
getPrimaryStation()
Get the primary ground station from which measurement is performed.GroundStation
getSecondaryStation()
Get the secondary ground station reflecting the signal.protected EstimatedMeasurement<TurnAroundRange>
theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states)
Estimate the theoretical value.protected EstimatedMeasurementBase<TurnAroundRange>
theoreticalEvaluationWithoutDerivatives(int iteration, int evaluation, SpacecraftState[] states)
Estimate the theoretical value without derivatives.-
Methods inherited from class org.orekit.estimation.measurements.GroundReceiverMeasurement
computeCommonParametersWithDerivatives, computeCommonParametersWithout, getGroundStationCoordinates, getGroundStationPosition, getStation, isTwoWay
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Methods inherited from class org.orekit.estimation.measurements.AbstractMeasurement
addModifier, addParameterDriver, estimate, estimateWithoutDerivatives, getBaseWeight, getCoordinates, getDate, getDimension, getModifiers, getObservedValue, getParametersDrivers, getSatellites, getTheoreticalStandardDeviation, isEnabled, setEnabled, signalTimeOfFlight, signalTimeOfFlight, signalTimeOfFlight, signalTimeOfFlight, signalTimeOfFlight, signalTimeOfFlight
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.orekit.estimation.measurements.ComparableMeasurement
compareTo
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Methods inherited from interface org.orekit.estimation.measurements.ObservedMeasurement
estimateWithoutDerivatives, getMeasurementType
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Methods inherited from interface org.orekit.utils.ParameterDriversProvider
getNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupported
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Methods inherited from interface org.orekit.time.TimeStamped
durationFrom
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Field Detail
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MEASUREMENT_TYPE
public static final String MEASUREMENT_TYPE
Type of the measurement.- See Also:
- Constant Field Values
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Constructor Detail
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TurnAroundRange
public TurnAroundRange(GroundStation primaryStation, GroundStation secondaryStation, AbsoluteDate date, double turnAroundRange, double sigma, double baseWeight, ObservableSatellite satellite)
Simple constructor.- Parameters:
primaryStation
- ground station from which measurement is performedsecondaryStation
- ground station reflecting the signaldate
- date of the measurementturnAroundRange
- observed valuesigma
- theoretical standard deviationbaseWeight
- base weightsatellite
- satellite related to this measurement- Since:
- 9.3
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Method Detail
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getPrimaryStation
public GroundStation getPrimaryStation()
Get the primary ground station from which measurement is performed.- Returns:
- primary ground station from which measurement is performed
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getSecondaryStation
public GroundStation getSecondaryStation()
Get the secondary ground station reflecting the signal.- Returns:
- secondary ground station reflecting the signal
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theoreticalEvaluationWithoutDerivatives
protected EstimatedMeasurementBase<TurnAroundRange> theoreticalEvaluationWithoutDerivatives(int iteration, int evaluation, SpacecraftState[] states)
Estimate the theoretical value without derivatives.The theoretical value does not have any modifiers applied.
- Specified by:
theoreticalEvaluationWithoutDerivatives
in classAbstractMeasurement<TurnAroundRange>
- Parameters:
iteration
- iteration numberevaluation
- evaluation numberstates
- orbital states at measurement date- Returns:
- theoretical value
- See Also:
AbstractMeasurement.estimate(int, int, SpacecraftState[])
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theoreticalEvaluation
protected EstimatedMeasurement<TurnAroundRange> theoreticalEvaluation(int iteration, int evaluation, SpacecraftState[] states)
Estimate the theoretical value.The theoretical value does not have any modifiers applied.
- Specified by:
theoreticalEvaluation
in classAbstractMeasurement<TurnAroundRange>
- Parameters:
iteration
- iteration numberevaluation
- evaluation numberstates
- orbital states at measurement date- Returns:
- theoretical value
- See Also:
AbstractMeasurement.estimate(int, int, SpacecraftState[])
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