org.orekit.attitudes
Class BodyCenterGroundPointing

java.lang.Object
  org.orekit.attitudes.AbstractAttitudeLaw
      org.orekit.attitudes.GroundPointing
          org.orekit.attitudes.BodyCenterGroundPointing

All Implemented Interfaces:

Serializable, AttitudeLaw, AttitudeProvider

public class BodyCenterGroundPointing
extends GroundPointing

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.

The satellite z axis is pointing to the body frame center.

Since:

2.0

Version:

$Id: BodyCenterGroundPointing.java 15575 2016-03-10 15:09:27Z bignon $

Author:

Tiziana Sabatini

See Also:

GroundPointing, BodyCenterPointing, Serialized Form

Concurrency :

immutable

Constructor Summary

BodyCenterGroundPointing(BodyShape shape)
Constructor.

Method Summary

protected Vector3D

getTargetPoint(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the target point in specified frame.

Methods inherited from class org.orekit.attitudes.GroundPointing

getAttitude, getBodyFrame, getBodyShape, getTargetPV

Methods inherited from class org.orekit.attitudes.AbstractAttitudeLaw

getAttitude, getSpinDerivativesComputation, setSpinDerivativesComputation

Methods inherited from class java.lang.Object

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

Constructor Detail

BodyCenterGroundPointing

public BodyCenterGroundPointing(BodyShape shape)

Constructor. Create a BodyCenterGroundPointing attitude provider.

Parameters:

shape - a body shape

Method Detail

getTargetPoint

protected Vector3D getTargetPoint(PVCoordinatesProvider pvProv,
                                  AbsoluteDate date,
                                  Frame frame)
                           throws OrekitException

Description copied from class: GroundPointing

Compute the target point in specified frame.

Specified by:

getTargetPoint 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

Throws:

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