Package org.orekit.estimation.measurements.gnss

Class AbstractOneWayGNSS<T extends ObservedMeasurement<T>>

java.lang.Object

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

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

All Implemented Interfaces:

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

Direct Known Subclasses:

OneWayGNSSPhase, OneWayGNSSRange, OneWayGNSSRangeRate

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

Abstract class for one-way GNSS, scalar measurement.

Since:

14.0

Author:

Romain Serra

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractOneWayGNSS(ObserverSatellite gnssSatellite, AbsoluteDate date, double observedValue, double sigma, double baseWeight, SignalTravelTimeModel signalTravelTimeModel, ObservableSatellite local)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
protected CommonParametersWithDerivatives	computeLocalParametersWith(SpacecraftState[] states, ObservableSatellite localSat, AbsoluteDate measurementDate, boolean receiverClockOffsetAlreadyApplied, List<ParameterDriver> parameterDrivers)	Compute common estimation parameters with derivatives when the measured object is the receiver of the signal sent by the Observer.
protected CommonParametersWithoutDerivatives	computeLocalParametersWithout(SpacecraftState[] states, ObservableSatellite localSat, AbsoluteDate measurementDate, boolean receiverClockOffsetAlreadyApplied)	Compute common estimation parameters in case where measured object is the receiver of the signal value (e.g.
protected void	fillDerivatives(Gradient observedValue, Map<String,Integer> indices, EstimatedMeasurement<T> estimated)	Method filling estimated measurement.
ObserverSatellite	getObserver()	Get satellite sending 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

AbstractOneWayGNSS

protected AbstractOneWayGNSS(ObserverSatellite gnssSatellite,
                             AbsoluteDate date,
                             double observedValue,
                             double sigma,
                             double baseWeight,
                             SignalTravelTimeModel signalTravelTimeModel,
                             ObservableSatellite local)

Simple constructor.

Parameters:

gnssSatellite - GNSS observer satellite

date - date of the measurement

observedValue - observed value

sigma - theoretical standard deviation

baseWeight - base weight

signalTravelTimeModel - time delay computer

local - satellite which receives the signal and perform the measurement

Method Detail

getObserver

public final ObserverSatellite getObserver()

Get satellite sending signal.

Returns:

GNSS satellite

computeLocalParametersWithout

protected CommonParametersWithoutDerivatives computeLocalParametersWithout(SpacecraftState[] states,
                                                                           ObservableSatellite localSat,
                                                                           AbsoluteDate measurementDate,
                                                                           boolean receiverClockOffsetAlreadyApplied)

Compute common estimation parameters in case where measured object is the receiver of the signal value (e.g. GNSS to ObservableSatellite).

Parameters:

states - state(s) of all measured spacecraft

localSat - satellite whose state is being estimated

measurementDate - date when measurement was taken

receiverClockOffsetAlreadyApplied - if true, the specified date is as read by the receiver clock (i.e. clock offset not compensated), if false, the specified date was already compensated and is a physical absolute date

Returns:

common parameters

computeLocalParametersWith

protected CommonParametersWithDerivatives computeLocalParametersWith(SpacecraftState[] states,
                                                                     ObservableSatellite localSat,
                                                                     AbsoluteDate measurementDate,
                                                                     boolean receiverClockOffsetAlreadyApplied,
                                                                     List<ParameterDriver> parameterDrivers)

Compute common estimation parameters with derivatives when the measured object is the receiver of the signal sent by the Observer.

Parameters:

states - state(s) of all measured spacecraft

localSat - satellite whose state is being estimated

measurementDate - date when measurement was taken

receiverClockOffsetAlreadyApplied - if true, the specified date is as read

parameterDrivers - list of parameter drivers associated with measurement by the receiver clock (i.e. clock offset not compensated), if false, the specified date was already compensated and is a physical absolute date

Returns:

common parameters

fillDerivatives

protected void fillDerivatives(Gradient observedValue,
                               Map<String,Integer> indices,
                               EstimatedMeasurement<T> estimated)

Method filling estimated measurement.

Parameters:

observedValue - theoretical value with automatic differentiation

indices - mapping between parameter name and variable index

estimated - object to fill