org.orekit.models.earth.ionosphere

Interface IonosphericModel

All Superinterfaces:

Serializable

All Known Implementing Classes:

EstimatedIonosphericModel, GlobalIonosphereMapModel, KlobucharIonoModel, NeQuickModel, SsrVtecIonosphericModel

public interface IonosphericModel
extends Serializable

Defines a ionospheric model, used to calculate the path delay imposed to electro-magnetic signals between an orbital satellite and a ground station.

Since 10.0, this interface can be used for models that aspire to estimate ionospheric parameters.

Since:

7.1

Author:

Joris Olympio, Bryan Cazabonne

Method Summary

Modifier and Type	Method and Description
default double[]	getParameters() Get ionospheric model parameters.
default <T extends CalculusFieldElement<T>> T[]	getParameters(Field<T> field) Get ionospheric model parameters.
List<ParameterDriver>	getParametersDrivers() Get the drivers for ionospheric model parameters.
<T extends CalculusFieldElement<T>> T	pathDelay(FieldSpacecraftState<T> state, TopocentricFrame baseFrame, double frequency, T[] parameters) Calculates the ionospheric path delay for the signal path from a ground station to a satellite.
double	pathDelay(SpacecraftState state, TopocentricFrame baseFrame, double frequency, double[] parameters) Calculates the ionospheric path delay for the signal path from a ground station to a satellite.

Method Detail

pathDelay

double pathDelay(SpacecraftState state,
                 TopocentricFrame baseFrame,
                 double frequency,
                 double[] parameters)

Calculates the ionospheric path delay for the signal path from a ground station to a satellite.

This method is intended to be used for orbit determination issues. In that respect, if the elevation is below 0° the path delay will be equal to zero.

For individual use of the ionospheric model (i.e. not for orbit determination), another method signature can be implemented to compute the path delay for any elevation angle.

Parameters:

state - spacecraft state

baseFrame - base frame associated with the station

frequency - frequency of the signal in Hz

parameters - ionospheric model parameters

Returns:

the path delay due to the ionosphere in m

pathDelay

<T extends CalculusFieldElement<T>> T pathDelay(FieldSpacecraftState<T> state,
                                                TopocentricFrame baseFrame,
                                                double frequency,
                                                T[] parameters)

Calculates the ionospheric path delay for the signal path from a ground station to a satellite.

This method is intended to be used for orbit determination issues. In that respect, if the elevation is below 0° the path delay will be equal to zero.

For individual use of the ionospheric model (i.e. not for orbit determination), another method signature can be implemented to compute the path delay for any elevation angle.

Type Parameters:

T - type of the elements

Parameters:

state - spacecraft state

baseFrame - base frame associated with the station

frequency - frequency of the signal in Hz

parameters - ionospheric model parameters

Returns:

the path delay due to the ionosphere in m

getParametersDrivers

List<ParameterDriver> getParametersDrivers()

Get the drivers for ionospheric model parameters.

Returns:

drivers for ionospheric model parameters

getParameters

default double[] getParameters()

Get ionospheric model parameters.

Returns:

ionospheric model parameters

getParameters

default <T extends CalculusFieldElement<T>> T[] getParameters(Field<T> field)

Get ionospheric model parameters.

Type Parameters:

T - type of the elements

Parameters:

field - field to which the elements belong

Returns:

ionospheric model parameters