Package org.orekit.estimation.measurements

Class GroundReceiverMeasurement<T extends ObservedMeasurement<T>>

java.lang.Object

org.orekit.estimation.measurements.AbstractMeasurement<T>

org.orekit.estimation.measurements.GroundReceiverMeasurement<T>

Type Parameters:

T - type of the measurement

All Implemented Interfaces:

Comparable<ComparableMeasurement>, ComparableMeasurement, ObservedMeasurement<T>, TimeStamped, ParameterDriversProvider

Direct Known Subclasses:

BistaticRange, BistaticRangeRate, GroundBasedAngularMeasurement

public abstract class GroundReceiverMeasurement<T extends ObservedMeasurement<T>>
extends AbstractMeasurement<T>

Base class modeling a measurement where receiver is a ground station.

Since:

12.0

Author:

Thierry Ceolin, Luc Maisonobe, Maxime Journot

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GroundReceiverMeasurement(GroundStation station, boolean isTwoWay, AbsoluteDate date, double[] observedValue, double[] sigma, double[] baseWeight, SignalTravelTimeModel signalTravelTimeModel, ObservableSatellite satellite)	Simple constructor for scalar measurements.

Method Summary

Modifier and Type	Method	Description
protected AbsoluteDate	computeEmissionDate(Frame frame, PVCoordinatesProvider receiver, AbsoluteDate receptionDate, PVCoordinatesProvider emitter)	Compute the signal emission date.
protected FieldAbsoluteDate<Gradient>	computeEmissionDateField(Frame frame, FieldPVCoordinatesProvider<Gradient> receiver, FieldAbsoluteDate<Gradient> receptionDate, FieldPVCoordinatesProvider<Gradient> emitter)	Compute the signal emission date.
protected AbsoluteDate	getCorrectedReceptionDate()	Compute actual reception date taking into account clock offset.
protected FieldAbsoluteDate<Gradient>	getCorrectedReceptionDateField(int nbParams, Map<String,Integer> paramIndices)	Compute actual reception date taking into account clock offset.
protected Map<String,Integer>	getParameterIndices(SpacecraftState[] states)	Form the mapping between parameters' names and derivatives' indices.
GroundStation	getReceiverStation()	Get the ground station that receives the signal.

Methods inherited from class org.orekit.estimation.measurements.AbstractMeasurement

addModifier, addParameterDriver, addParametersDrivers, estimate, estimateWithoutDerivatives, getBaseWeight, getCoordinates, getDate, getDimension, getModifiers, getObservedValue, getParametersDrivers, getSatellites, getSignalTravelTimeModel, getTheoreticalStandardDeviation, isEnabled, isTwoWay, setEnabled, setObservedValue, theoreticalEvaluation, theoreticalEvaluationWithoutDerivatives

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.orekit.estimation.measurements.ComparableMeasurement

compareTo

Methods inherited from interface org.orekit.estimation.measurements.ObservedMeasurement

estimateWithoutDerivatives, getMeasurementType

Methods inherited from interface org.orekit.utils.ParameterDriversProvider

getNbParametersDriversValue, getParameterDriver, getParameters, getParameters, getParameters, getParameters, getParametersAllValues, getParametersAllValues, isSupported

Methods inherited from interface org.orekit.time.TimeStamped

durationFrom

Constructor Detail

GroundReceiverMeasurement

protected GroundReceiverMeasurement(GroundStation station,
                                    boolean isTwoWay,
                                    AbsoluteDate date,
                                    double[] observedValue,
                                    double[] sigma,
                                    double[] baseWeight,
                                    SignalTravelTimeModel signalTravelTimeModel,
                                    ObservableSatellite satellite)

Simple constructor for scalar measurements.

Parameters:

station - ground station from which measurement is performed

isTwoWay - flag indicating whether it is a two-way measurement

signalTravelTimeModel - signal travel time model

date - date of the measurement

observedValue - observed value

sigma - theoretical standard deviation

baseWeight - base weight

satellite - satellite related to this measurement

Method Detail

getReceiverStation

public final GroundStation getReceiverStation()

Get the ground station that receives the signal.

Returns:

ground station

getParameterIndices

protected Map<String,Integer> getParameterIndices(SpacecraftState[] states)

Form the mapping between parameters' names and derivatives' indices.

Parameters:

states - observables

Returns:

map

getCorrectedReceptionDate

protected AbsoluteDate getCorrectedReceptionDate()

Compute actual reception date taking into account clock offset.

Returns:

reception date

getCorrectedReceptionDateField

protected FieldAbsoluteDate<Gradient> getCorrectedReceptionDateField(int nbParams,
                                                                     Map<String,Integer> paramIndices)

Compute actual reception date taking into account clock offset.

Parameters:

nbParams - number of independent variables for automatic differentiation

paramIndices - mapping between parameter name and variable index

Returns:

reception date

computeEmissionDate

protected AbsoluteDate computeEmissionDate(Frame frame,
                                           PVCoordinatesProvider receiver,
                                           AbsoluteDate receptionDate,
                                           PVCoordinatesProvider emitter)

Compute the signal emission date.

Parameters:

frame - frame where to perform signal propagation

receiver - signal receiver

receptionDate - reception date

emitter - signal emitter

Returns:

emission date

computeEmissionDateField

protected FieldAbsoluteDate<Gradient> computeEmissionDateField(Frame frame,
                                                               FieldPVCoordinatesProvider<Gradient> receiver,
                                                               FieldAbsoluteDate<Gradient> receptionDate,
                                                               FieldPVCoordinatesProvider<Gradient> emitter)

Compute the signal emission date.

Parameters:

frame - frame where to perform signal propagation

receiver - signal receiver

receptionDate - reception date

emitter - signal emitter

Returns:

emission date