Package org.orekit.propagation.integration

Class FieldStateMapper<T extends CalculusFieldElement<T>>

java.lang.Object

org.orekit.propagation.integration.FieldStateMapper<T>

Type Parameters:

T - type of the field elements

public abstract class FieldStateMapper<T extends CalculusFieldElement<T>>
extends Object

This class maps between raw double elements and FieldSpacecraftState instances.

Author:

Luc Maisonobe

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FieldStateMapper(FieldAbsoluteDate<T> referenceDate, T mu, OrbitType orbitType, PositionAngleType positionAngleType, AttitudeProvider attitudeProvider, Frame frame)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
AttitudeProvider	getAttitudeProvider()	Get the attitude provider.
Frame	getFrame()	Get the inertial frame.
T	getMu()	Get the central attraction coefficient μ.
OrbitType	getOrbitType()	Get propagation parameter type.
PositionAngleType	getPositionAngleType()	Get propagation parameter type.
FieldAbsoluteDate<T>	getReferenceDate()	Get reference date.
abstract FieldSpacecraftState<T>	mapArrayToState(FieldAbsoluteDate<T> date, T[] y, T[] yDot, PropagationType type)	Map the raw double components to a spacecraft state.
FieldSpacecraftState<T>	mapArrayToState(T t, T[] y, T[] yDot, PropagationType type)	Map the raw double components to a spacecraft state.
T	mapDateToDouble(FieldAbsoluteDate<T> date)	Map a date to a raw double time offset.
FieldAbsoluteDate<T>	mapDoubleToDate(T t)	Map the raw double time offset to a date.
FieldAbsoluteDate<T>	mapDoubleToDate(T t, FieldAbsoluteDate<T> date)	Map the raw double time offset to a date.
abstract void	mapStateToArray(FieldSpacecraftState<T> state, T[] y, T[] yDot)	Map a spacecraft state to raw double components.
void	setPositionAngleType()	Set position angle type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FieldStateMapper

protected FieldStateMapper(FieldAbsoluteDate<T> referenceDate,
                           T mu,
                           OrbitType orbitType,
                           PositionAngleType positionAngleType,
                           AttitudeProvider attitudeProvider,
                           Frame frame)

Simple constructor.

The position parameter type is meaningful only if propagation orbit type support it. As an example, it is not meaningful for propagation in Cartesian parameters.

Parameters:

referenceDate - reference date

mu - central attraction coefficient (m³/s²)

orbitType - orbit type to use for mapping

positionAngleType - angle type to use for propagation

attitudeProvider - attitude provider

frame - inertial frame

Method Detail

getReferenceDate

public FieldAbsoluteDate<T> getReferenceDate()

Get reference date.

Returns:

reference date

getOrbitType

public OrbitType getOrbitType()

Get propagation parameter type.

Returns:

orbit type used for propagation

setPositionAngleType

public void setPositionAngleType()

Set position angle type.

getPositionAngleType

public PositionAngleType getPositionAngleType()

Get propagation parameter type.

Returns:

angle type to use for propagation

getMu

public T getMu()

Get the central attraction coefficient μ.

Returns:

mu central attraction coefficient (m³/s²)

getFrame

public Frame getFrame()

Get the inertial frame.

Returns:

inertial frame

getAttitudeProvider

public AttitudeProvider getAttitudeProvider()

Get the attitude provider.

Returns:

attitude provider

mapDoubleToDate

public FieldAbsoluteDate<T> mapDoubleToDate(T t)

Map the raw double time offset to a date.

Parameters:

t - date offset

Returns:

date

mapDoubleToDate

public FieldAbsoluteDate<T> mapDoubleToDate(T t,
                                            FieldAbsoluteDate<T> date)

Map the raw double time offset to a date.

Parameters:

t - date offset

date - The expected date.

Returns:

date if it is the same time as t to within the lower precision of the latter. Otherwise a new date is returned that corresponds to time t.

mapDateToDouble

public T mapDateToDouble(FieldAbsoluteDate<T> date)

Map a date to a raw double time offset.

Parameters:

date - date

Returns:

time offset

mapArrayToState

public FieldSpacecraftState<T> mapArrayToState(T t,
                                               T[] y,
                                               T[] yDot,
                                               PropagationType type)

Map the raw double components to a spacecraft state.

Parameters:

t - date offset

y - state components

yDot - state derivative components

type - type of the elements used to build the state (mean or osculating)

Returns:

spacecraft state

mapArrayToState

public abstract FieldSpacecraftState<T> mapArrayToState(FieldAbsoluteDate<T> date,
                                                        T[] y,
                                                        T[] yDot,
                                                        PropagationType type)

Map the raw double components to a spacecraft state.

Parameters:

date - of the state components

y - state components

yDot - state derivative components

type - type of the elements used to build the state (mean or osculating).

Returns:

spacecraft state

mapStateToArray

public abstract void mapStateToArray(FieldSpacecraftState<T> state,
                                     T[] y,
                                     T[] yDot)

Map a spacecraft state to raw double components.

Parameters:

state - state to map

y - placeholder where to put the components

yDot - placeholder where to put the components derivatives