org.orekit.attitudes
Class SpinStabilized

java.lang.Object
  org.orekit.attitudes.AbstractAttitudeLaw
      org.orekit.attitudes.SpinStabilized

All Implemented Interfaces:

Serializable, AttitudeLaw, AttitudeLawModifier, AttitudeProvider

public class SpinStabilized
extends AbstractAttitudeLaw
implements AttitudeLawModifier

This class handles a spin stabilized attitude provider.

Spin stabilized laws are handled as wrappers for an underlying non-rotating law. This underlying law is typically an instance of CelestialBodyPointed with the pointing axis equal to the rotation axis, but can in fact be anything.

Instances of this class are guaranteed to be immutable.

Author:

Luc Maisonobe

See Also:

Serialized Form

Constructor Summary

SpinStabilized(AttitudeLaw pNonRotatingLaw, AbsoluteDate pStart, Vector3D pAxis, double pRate)
Creates a new instance.

Method Summary

Attitude	getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the attitude corresponding to an orbital state.
AttitudeLaw	getUnderlyingAttitudeLaw() Get the underlying attitude law.

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

Methods inherited from interface org.orekit.attitudes.AttitudeProvider

getAttitude, setSpinDerivativesComputation

Constructor Detail

SpinStabilized

public SpinStabilized(AttitudeLaw pNonRotatingLaw,
                      AbsoluteDate pStart,
                      Vector3D pAxis,
                      double pRate)

Creates a new instance.

Parameters:

pNonRotatingLaw - underlying non-rotating attitude law

pStart - start date of the rotation

pAxis - rotation axis in satellite frame

pRate - spin rate in radians per seconds

Method Detail

getAttitude

public final Attitude getAttitude(PVCoordinatesProvider pvProv,
                                  AbsoluteDate date,
                                  Frame frame)
                           throws OrekitException

Compute the attitude corresponding to an orbital state.

Specified by:

getAttitude in interface AttitudeProvider

Parameters:

pvProv - local position-velocity provider around current date

date - current date

frame - reference frame from which attitude is computed

Returns:

attitude attitude on the specified date and position-velocity state

Throws:

OrekitException - if attitude cannot be computed

getUnderlyingAttitudeLaw

public final AttitudeLaw getUnderlyingAttitudeLaw()

Get the underlying attitude law.

Specified by:

getUnderlyingAttitudeLaw in interface AttitudeLawModifier

Returns:

underlying attitude law