Package org.orekit.estimation.measurements.gnss

Class AbstractInterSatellitesMeasurement<T extends ObservedMeasurement<T>>

java.lang.Object

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

org.orekit.estimation.measurements.gnss.AbstractOnBoardMeasurement<T>

org.orekit.estimation.measurements.gnss.AbstractInterSatellitesMeasurement<T>

Type Parameters:

T - type of the measurement

All Implemented Interfaces:

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

Direct Known Subclasses:

InterSatellitesOneWayRangeRate, InterSatellitesPhase

public abstract class AbstractInterSatellitesMeasurement<T extends ObservedMeasurement<T>>
extends AbstractOnBoardMeasurement<T>

Base class for measurement between two satellites that are both estimated.

The measurement is considered to be a signal emitted from a remote satellite and received by a local satellite. Its value is the number of cycles between emission and reception. The motion of both spacecraft during the signal flight time are taken into account. The date of the measurement corresponds to the reception on ground of the emitted signal.

Since:

12.1

Author:

Luc Maisonobe

Constructor Summary

Constructors

Constructor	Description
AbstractInterSatellitesMeasurement(AbsoluteDate date, double observed, double sigma, double baseWeight, ObservableSatellite local, ObservableSatellite remote)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected QuadraticClockModel	getRemoteClock()	Get emitting satellite clock provider.
protected PVCoordinatesProvider	getRemotePV(SpacecraftState[] states)	Get emitting satellite position/velocity provider.
protected FieldPVCoordinatesProvider<Gradient>	getRemotePV(SpacecraftState[] states, int freeParameters)	Get emitting satellite position/velocity provider.

Methods inherited from class org.orekit.estimation.measurements.gnss.AbstractOnBoardMeasurement

computeCommonParametersWith, computeCommonParametersWithout, getRemoteClock

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, 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

AbstractInterSatellitesMeasurement

public AbstractInterSatellitesMeasurement(AbsoluteDate date,
                                          double observed,
                                          double sigma,
                                          double baseWeight,
                                          ObservableSatellite local,
                                          ObservableSatellite remote)

Constructor.

Parameters:

date - date of the measurement

observed - observed value

sigma - theoretical standard deviation

baseWeight - base weight

local - satellite which receives the signal and performs the measurement

remote - remote satellite which simply emits the signal

Method Detail

getRemotePV

protected PVCoordinatesProvider getRemotePV(SpacecraftState[] states)

Get emitting satellite position/velocity provider.

Specified by:

getRemotePV in class AbstractOnBoardMeasurement<T extends ObservedMeasurement<T>>

Parameters:

states - states of all spacecraft involved in the measurement

Returns:

emitting satellite position/velocity provider

getRemoteClock

protected QuadraticClockModel getRemoteClock()

Get emitting satellite clock provider.

Specified by:

getRemoteClock in class AbstractOnBoardMeasurement<T extends ObservedMeasurement<T>>

Returns:

emitting satellite clock provider

getRemotePV

protected FieldPVCoordinatesProvider<Gradient> getRemotePV(SpacecraftState[] states,
                                                           int freeParameters)

Get emitting satellite position/velocity provider.

Specified by:

getRemotePV in class AbstractOnBoardMeasurement<T extends ObservedMeasurement<T>>

Parameters:

states - states of all spacecraft involved in the measurement

freeParameters - total number of free parameters in the gradient

Returns:

emitting satellite position/velocity provider