Package org.orekit.estimation.measurements.modifiers

Class AngularIonosphericDelayModifier

java.lang.Object

org.orekit.estimation.measurements.modifiers.AngularIonosphericDelayModifier

All Implemented Interfaces:

EstimationModifier<AngularAzEl>, ParameterDriversProvider

public class AngularIonosphericDelayModifier
extends Object
implements EstimationModifier<AngularAzEl>

Class modifying theoretical angular measurement with ionospheric delay.

The effect of ionospheric correction on the angular measurement is computed through the computation of the ionospheric delay. The spacecraft state is shifted by the computed delay time and elevation and azimuth are computed again with the new spacecraft state.

The ionospheric delay depends on the frequency of the signal (GNSS, VLBI, ...). For optical measurements (e.g. SLR), the ray is not affected by ionosphere charged particles.

Since 10.0, state derivatives and ionospheric parameters derivates are computed using automatic differentiation.

Since:

8.0

Author:

Thierry Ceolin

Constructor Summary

Constructors

Constructor	Description
AngularIonosphericDelayModifier(IonosphericModel model, double freq)	Constructor.

Method Summary

Modifier and Type	Method	Description
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.
void	modifyWithoutDerivatives(EstimatedMeasurementBase<AngularAzEl> estimated)	Apply a modifier to an estimated measurement without derivatives.

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.EstimationModifier

modify

Methods inherited from interface org.orekit.utils.ParameterDriversProvider

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

Constructor Detail

AngularIonosphericDelayModifier

public AngularIonosphericDelayModifier(IonosphericModel model,
                                       double freq)

Constructor.

Parameters:

model - Ionospheric delay model appropriate for the current angular measurement method.

freq - frequency of the signal in Hz

Method Detail

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters.

Specified by:

getParametersDrivers in interface ParameterDriversProvider

Returns:

drivers for parameters

modifyWithoutDerivatives

public void modifyWithoutDerivatives(EstimatedMeasurementBase<AngularAzEl> estimated)

Description copied from interface: EstimationModifier

Apply a modifier to an estimated measurement without derivatives.

Specified by:

modifyWithoutDerivatives in interface EstimationModifier<AngularAzEl>

Parameters:

estimated - estimated measurement to modify