org.orekit.attitudes
Class LofOffset

java.lang.Object
  org.orekit.attitudes.LofOffset

All Implemented Interfaces:

java.io.Serializable, AttitudeLaw

public class LofOffset
extends java.lang.Object
implements AttitudeLaw

This class provides a default attitude law.

The attitude law is defined as a rotation offset from local orbital frame. This rotation can be defined by NB : Local orbital frame is defined as follows :

• Z axis pointed towards central body,
• Y opposite to angular momentum
• X roughly along velocity (it would be perfectly aligned only for circular orbits or at perigee and apogee of non-circular orbits).

Version:

$Revision:1665 $ $Date:2008-06-11 12:12:59 +0200 (mer., 11 juin 2008) $

Author:

Véronique Pommier-Maurussane

See Also:

Serialized Form

Field Summary

static LofOffset

LOF_ALIGNED Dummy attitude law, perfectly aligned with the LOF frame.

Constructor Summary

LofOffset(org.apache.commons.math.geometry.RotationOrder order, double alpha1, double alpha2, double alpha3)
Creates new instance.

Method Summary

Attitude

getAttitude(Orbit orbit) Compute the attitude corresponding to an orbital state.

Methods inherited from class java.lang.Object

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

Field Detail

LOF_ALIGNED

public static final LofOffset LOF_ALIGNED

Dummy attitude law, perfectly aligned with the LOF frame.

Constructor Detail

LofOffset

public LofOffset(org.apache.commons.math.geometry.RotationOrder order,
                 double alpha1,
                 double alpha2,
                 double alpha3)

Creates new instance.

Parameters:

order - order of rotations to use for (alpha1, alpha2, alpha3) composition

alpha1 - angle of the first elementary rotation

alpha2 - angle of the second elementary rotation

alpha3 - angle of the third elementary rotation

Method Detail

getAttitude

public Attitude getAttitude(Orbit orbit)

Compute the attitude corresponding to an orbital state.

Specified by:

getAttitude in interface AttitudeLaw

Parameters:

orbit - orbit state for which attitude is requested

Returns:

attitude attitude on the specified orbit, using orbit inertial frame as its reference frame