Package org.orekit.estimation.measurements

Class AngularMeasurement<T extends SignalBasedMeasurement<T>>

java.lang.Object

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

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

AngularAzEl, AngularRaDec

public abstract class AngularMeasurement<T extends SignalBasedMeasurement<T>>
extends SignalBasedMeasurement<T>

Abstract class for ground-based angular measurements, when the sensor receives the signal.

Since:

14.0

Author:

Romain Serra

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AngularMeasurement(AbsoluteDate date, double[] angular, MeasurementQuality measurementQuality, SignalTravelTimeModel signalTravelTimeModel, ObservableSatellite satellite)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
protected AbsoluteDate	computeEmissionDate(SignalReceptionCondition receptionCondition, PVCoordinatesProvider emitter)	Compute the signal emission date.
protected FieldAbsoluteDate<Gradient>	computeEmissionDateField(Frame frame, FieldVector3D<Gradient> receiverPosition, FieldAbsoluteDate<Gradient> receptionDate, FieldPVCoordinatesProvider<Gradient> emitter)	Compute the signal emission date.
protected void	fillDerivatives(double[] firstAngleDerivatives, double[] secondAngleDerivatives, Map<String,Integer> paramIndices, EstimatedMeasurement<T> estimatedMeasurement)	Method filling derivatives in the estimated measurement.
protected void	fillEstimatedMeasurement(Gradient firstAngle, Gradient secondAngle, Map<String,Integer> paramIndices, EstimatedMeasurement<T> estimatedMeasurement)	Method filling estimated measurement.
protected double	wrapFirstAngle(double baseAngle)	Wrap angle according to observed one.
protected Gradient	wrapFirstAngle(Gradient baseAngle)	Wrap angle according to observed one.

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

getSignalTravelTimeModel, isTwoWay

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

addModifier, addParameterDriver, addParametersDrivers, estimate, estimateWithoutDerivatives, getCoordinates, getDate, getMeasurementQuality, getModifiers, getObservedValue, getParameterIndices, getParametersDrivers, getSatellites, isEnabled, 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, getBaseWeight, getDimension, getMeasurementType, getTheoreticalStandardDeviation

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 Details

AngularMeasurement

protected AngularMeasurement(AbsoluteDate date,
 double[] angular,
 MeasurementQuality measurementQuality,
 SignalTravelTimeModel signalTravelTimeModel,
 ObservableSatellite satellite)

Simple constructor.

Parameters:

date - date of the measurement

angular - observed value

measurementQuality - measurement quality as used in estimation (in Orekit, the crossed-terms of the covariance matrix are only used by Kalman filters, not least squares)

signalTravelTimeModel - signal travel time model

satellite - satellite related to this measurement

Method Details

computeEmissionDate

protected AbsoluteDate computeEmissionDate(SignalReceptionCondition receptionCondition,
 PVCoordinatesProvider emitter)

Compute the signal emission date.

Parameters:

receptionCondition - signal reception condition

emitter - signal emitter

Returns:

emission date

computeEmissionDateField

protected FieldAbsoluteDate<Gradient> computeEmissionDateField(Frame frame,
 FieldVector3D<Gradient> receiverPosition,
 FieldAbsoluteDate<Gradient> receptionDate,
 FieldPVCoordinatesProvider<Gradient> emitter)

Compute the signal emission date.

Parameters:

frame - frame where to perform signal propagation

receiverPosition - signal receiver position at reception

receptionDate - reception date

emitter - signal emitter

Returns:

emission date

wrapFirstAngle

protected double wrapFirstAngle(double baseAngle)

Wrap angle according to observed one.

Parameters:

baseAngle - base angle

Returns:

wrapped angle

wrapFirstAngle

protected Gradient wrapFirstAngle(Gradient baseAngle)

Wrap angle according to observed one.

Parameters:

baseAngle - base angle

Returns:

wrapped angle

fillEstimatedMeasurement

protected void fillEstimatedMeasurement(Gradient firstAngle,
 Gradient secondAngle,
 Map<String,Integer> paramIndices,
 EstimatedMeasurement<T> estimatedMeasurement)

Method filling estimated measurement.

Parameters:

firstAngle - first angle

secondAngle - second angle

paramIndices - mapping between parameter name and variable index

estimatedMeasurement - object to fill

fillDerivatives

protected void fillDerivatives(double[] firstAngleDerivatives,
 double[] secondAngleDerivatives,
 Map<String,Integer> paramIndices,
 EstimatedMeasurement<T> estimatedMeasurement)

Method filling derivatives in the estimated measurement.

Parameters:

firstAngleDerivatives - first angle derivatives

secondAngleDerivatives - second angle derivatives

paramIndices - mapping between parameter name and variable index

estimatedMeasurement - object to fill