Package org.orekit.attitudes

Class GroundPointingAttitudeModifier

java.lang.Object

org.orekit.attitudes.GroundPointing

org.orekit.attitudes.GroundPointingAttitudeModifier

All Implemented Interfaces:

AttitudeProvider, AttitudeProviderModifier, EventDetectorsProvider

Direct Known Subclasses:

YawCompensation, YawSteering

public abstract class GroundPointingAttitudeModifier
extends GroundPointing
implements AttitudeProviderModifier

Abstract class for attitude provider modifiers using an underlying ground pointing law.

Since:

12.1

Author:

Romain Serra

See Also:

GroundPointing, AttitudeProviderModifier

Field Summary

Fields inherited from interface org.orekit.propagation.events.EventDetectorsProvider

DATATION_ACCURACY

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	GroundPointingAttitudeModifier(Frame inertialFrame, Frame bodyFrame, GroundPointing groundPointingLaw)	Constructor.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> FieldAttitude<T>	getBaseState(FieldPVCoordinatesProvider<T> pvProv, FieldAbsoluteDate<T> date, Frame frame)	Compute the base system state at given date, without modifications.
Attitude	getBaseState(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame)	Compute the base system state at given date, without modifications.
protected <T extends CalculusFieldElement<T>> FieldVector3D<T>	getTargetPosition(FieldPVCoordinatesProvider<T> pvProv, FieldAbsoluteDate<T> date, Frame frame)	Compute the target point position in specified frame.
protected Vector3D	getTargetPosition(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame)	Compute the target point position in specified frame.
<T extends CalculusFieldElement<T>> TimeStampedFieldPVCoordinates<T>	getTargetPV(FieldPVCoordinatesProvider<T> pvProv, FieldAbsoluteDate<T> date, Frame frame)	Compute the target point position/velocity in specified frame.
TimeStampedPVCoordinates	getTargetPV(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame)	Compute the target point position/velocity in specified frame.
GroundPointing	getUnderlyingAttitudeProvider()	Getter for underlying ground pointing law.

Methods inherited from class org.orekit.attitudes.GroundPointing

getAttitude, getAttitude, getAttitudeRotation, getAttitudeRotation, getBodyFrame

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.attitudes.AttitudeProvider

getAttitude, getAttitude, getAttitudeRotation, getAttitudeRotation

Methods inherited from interface org.orekit.attitudes.AttitudeProviderModifier

getEventDetectors, getEventDetectors, getFieldEventDetectors, getFieldEventDetectors

Constructor Detail

GroundPointingAttitudeModifier

protected GroundPointingAttitudeModifier(Frame inertialFrame,
                                         Frame bodyFrame,
                                         GroundPointing groundPointingLaw)

Constructor.

Parameters:

inertialFrame - frame in which orbital velocities are computed

bodyFrame - the frame that rotates with the body

groundPointingLaw - underlying ground pointing attitude law

Method Detail

getUnderlyingAttitudeProvider

public GroundPointing getUnderlyingAttitudeProvider()

Getter for underlying ground pointing law.

Specified by:

getUnderlyingAttitudeProvider in interface AttitudeProviderModifier

Returns:

underlying attitude provider, which in this case is a GroundPointing instance

getBaseState

public Attitude getBaseState(PVCoordinatesProvider pvProv,
                             AbsoluteDate date,
                             Frame frame)

Compute the base system state at given date, without modifications.

Parameters:

pvProv - provider for PV coordinates

date - date at which state is requested

frame - reference frame from which attitude is computed

Returns:

satellite base attitude state.

getBaseState

public <T extends CalculusFieldElement<T>> FieldAttitude<T> getBaseState(FieldPVCoordinatesProvider<T> pvProv,
                                                                         FieldAbsoluteDate<T> date,
                                                                         Frame frame)

Compute the base system state at given date, without modifications.

Type Parameters:

T - type of the field elements

Parameters:

pvProv - provider for PV coordinates

date - date at which state is requested

frame - reference frame from which attitude is computed

Returns:

satellite base attitude state.

getTargetPV

public TimeStampedPVCoordinates getTargetPV(PVCoordinatesProvider pvProv,
                                            AbsoluteDate date,
                                            Frame frame)

Compute the target point position/velocity in specified frame.

Specified by:

getTargetPV in class GroundPointing

Parameters:

pvProv - provider for PV coordinates

date - date at which target point is requested

frame - frame in which observed ground point should be provided

Returns:

observed ground point position (element 0) and velocity (at index 1) in specified frame

getTargetPosition

protected Vector3D getTargetPosition(PVCoordinatesProvider pvProv,
                                     AbsoluteDate date,
                                     Frame frame)

Compute the target point position in specified frame.

Overrides:

getTargetPosition in class GroundPointing

Parameters:

pvProv - provider for PV coordinates

date - date at which target point is requested

frame - frame in which observed ground point should be provided

Returns:

observed ground point position in specified frame

getTargetPV

public <T extends CalculusFieldElement<T>> TimeStampedFieldPVCoordinates<T> getTargetPV(FieldPVCoordinatesProvider<T> pvProv,
                                                                                        FieldAbsoluteDate<T> date,
                                                                                        Frame frame)

Compute the target point position/velocity in specified frame.

Specified by:

getTargetPV in class GroundPointing

Type Parameters:

T - type of the field elements

Parameters:

pvProv - provider for PV coordinates

date - date at which target point is requested

frame - frame in which observed ground point should be provided

Returns:

observed ground point position (element 0) and velocity (at index 1) in specified frame

getTargetPosition

protected <T extends CalculusFieldElement<T>> FieldVector3D<T> getTargetPosition(FieldPVCoordinatesProvider<T> pvProv,
                                                                                 FieldAbsoluteDate<T> date,
                                                                                 Frame frame)

Compute the target point position in specified frame.

Overrides:

getTargetPosition in class GroundPointing

Type Parameters:

T - type of the field elements

Parameters:

pvProv - provider for PV coordinates

date - date at which target point is requested

frame - frame in which observed ground point should be provided

Returns:

observed ground point position in specified frame