Package org.orekit.estimation.measurements

Class PseudoMeasurement<T extends PseudoMeasurement<T>>

java.lang.Object

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

Position, PV

public abstract class PseudoMeasurement<T extends PseudoMeasurement<T>>
extends AbstractMeasurement<T>

Abstract class modeling a position(-velocity) measurement, referred to as pseudo because it is not based on any signals.

Since:

14.0

Author:

Romain Serra

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PseudoMeasurement(AbsoluteDate date, double[] observed, MeasurementQuality measurementQuality, ObservableSatellite satellite)	Constructor with full covariance matrix and all inputs.

Method Summary

Modifier and Type	Method	Description
double[][]	getCorrelationCoefficientsMatrix()	Get the correlation coefficients matrix.
double[][]	getCovarianceMatrix()	Get the covariance matrix.

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

PseudoMeasurement

protected PseudoMeasurement(AbsoluteDate date,
 double[] observed,
 MeasurementQuality measurementQuality,
 ObservableSatellite satellite)

Constructor with full covariance matrix and all inputs.

The fact that the covariance matrix is symmetric and positive definite is not checked.

The measurement must be in the orbit propagation frame.

Parameters:

date - date of the measurement

observed - measurement value

measurementQuality - measurement quality data

satellite - satellite related to this measurement

Since:

14.0

Method Details

getCovarianceMatrix

public double[][] getCovarianceMatrix()

Get the covariance matrix.

Returns:

the covariance matrix

getCorrelationCoefficientsMatrix

public double[][] getCorrelationCoefficientsMatrix()

Get the correlation coefficients matrix.

This is the square, symmetric matrix M such that:

Mij = Pij/(σi.σj)

Where:

• P is the covariance matrix
• σi is the i-th standard deviation (σi² = Pii)

Returns:

the correlation coefficient matrix