org.orekit.attitudes

Class NadirPointing

java.lang.Object

org.orekit.attitudes.GroundPointing

org.orekit.attitudes.NadirPointing

All Implemented Interfaces:

Serializable, AttitudeProvider

public class NadirPointing
extends GroundPointing

This class handles nadir pointing attitude provider.

This class represents the attitude provider where the satellite z axis is pointing to the vertical of the ground point under satellite.

The object NadirPointing is guaranteed to be immutable.

Author:

Véronique Pommier-Maurussane

See Also:

GroundPointing, Serialized Form

Constructor Summary

Constructors

Constructor and Description
NadirPointing(BodyShape shape) Creates new instance.

Method Summary

Methods

Modifier and Type	Method and Description
protected TimeStampedPVCoordinates	getTargetPV(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the target point position/velocity in specified frame.

Methods inherited from class org.orekit.attitudes.GroundPointing

getAttitude, getBodyFrame

Methods inherited from class java.lang.Object

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

Constructor Detail

NadirPointing

public NadirPointing(BodyShape shape)

Creates new instance.

Parameters:

shape - Body shape

Method Detail

getTargetPV

protected TimeStampedPVCoordinates getTargetPV(PVCoordinatesProvider pvProv,
                                   AbsoluteDate date,
                                   Frame frame)
                                        throws OrekitException

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

Throws:

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