fr.cnes.sirius.patrius.attitudes

Class BodyCenterGroundPointing

java.lang.Object

fr.cnes.sirius.patrius.attitudes.AbstractAttitudeLaw

fr.cnes.sirius.patrius.attitudes.AbstractGroundPointing

fr.cnes.sirius.patrius.attitudes.BodyCenterGroundPointing

All Implemented Interfaces:

AttitudeLaw, AttitudeProvider, Serializable

public class BodyCenterGroundPointing
extends AbstractGroundPointing

This class handles body center pointing attitude provider; the difference between BodyCenterPointing and this class is that the target point of the former is the body center, while that of the latter is the corresponding point on the ground.

By default, the satellite z axis is pointing to the body frame center.

Since:

2.0

Version:

$Id: BodyCenterGroundPointing.java 18065 2017-10-02 16:42:02Z bignon $

Author:

Tiziana Sabatini

See Also:

BodyCenterPointing, Serialized Form

Concurrency :

immutable

Constructor Summary

Constructors

Constructor and Description
BodyCenterGroundPointing(BodyShape shape) Constructor.
BodyCenterGroundPointing(BodyShape shape, Vector3D losInSatFrameVec, Vector3D losNormalInSatFrameVec) Constructor.
BodyCenterGroundPointing(BodyShape shape, Vector3D losInSatFrameVec, Vector3D losNormalInSatFrameVec, double targetVelocityDeltaT) Constructor.

Method Summary

Modifier and Type	Method and Description
protected Vector3D	getTargetPosition(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the target ground point position in specified frame.
String	toString()

Methods inherited from class fr.cnes.sirius.patrius.attitudes.AbstractGroundPointing

getAttitude, getBodyFrame, getBodyShape, getLosInSatFrame, getLosNormalInSatFrame, getTargetPV

Methods inherited from class fr.cnes.sirius.patrius.attitudes.AbstractAttitudeLaw

getSpinDerivativesComputation, setSpinDerivativesComputation

Methods inherited from class java.lang.Object

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

Methods inherited from interface fr.cnes.sirius.patrius.attitudes.AttitudeProvider

computeSpinByFD, computeSpinDerivativeByFD, getAttitude

Constructor Detail

BodyCenterGroundPointing

public BodyCenterGroundPointing(BodyShape shape)

Constructor. Create a BodyCenterGroundPointing attitude provider.

Parameters:

shape - a body shape

BodyCenterGroundPointing

public BodyCenterGroundPointing(BodyShape shape,
                                Vector3D losInSatFrameVec,
                                Vector3D losNormalInSatFrameVec)

Constructor. Create a BodyCenterGroundPointing attitude provider with specified los axis in satellite frame.

Parameters:

shape - Body shape

losInSatFrameVec - LOS in satellite frame axis

losNormalInSatFrameVec - LOS normal axis in satellite frame

BodyCenterGroundPointing

public BodyCenterGroundPointing(BodyShape shape,
                                Vector3D losInSatFrameVec,
                                Vector3D losNormalInSatFrameVec,
                                double targetVelocityDeltaT)

Constructor. Create a BodyCenterGroundPointing attitude provider with specified los axis in satellite frame.

Parameters:

shape - Body shape

losInSatFrameVec - LOS in satellite frame axis

losNormalInSatFrameVec - LOS normal axis in satellite frame

targetVelocityDeltaT - the delta-T used to compute target velocity by finite differences

Method Detail

getTargetPosition

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

Compute the target ground point position in specified frame.

Specified by:

getTargetPosition in class AbstractGroundPointing

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

Throws:

PatriusException - if some specific error occurs, such as no target reached

toString

public String toString()

Overrides:

toString in class Object