org.orekit.attitudes
Class FixedRate

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

All Implemented Interfaces:

Serializable, AttitudeLaw, AttitudeProvider

public class FixedRate
extends AbstractAttitudeLaw

This class handles a simple attitude provider at constant rate around a fixed axis.

This attitude provider is a simple linear extrapolation from an initial orientation, a rotation axis and a rotation rate. All this elements can be specified as a simple reference attitude.

Instances of this class are guaranteed to be immutable.

Author:

Luc Maisonobe

See Also:

Serialized Form

Constructor Summary

FixedRate(Attitude pReferenceAttitude)
Creates a new instance.

Method Summary

Attitude	getAttitude(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame) Compute the attitude corresponding to an orbital state.
Attitude	getReferenceAttitude() Get the reference attitude.

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

FixedRate

public FixedRate(Attitude pReferenceAttitude)

Creates a new instance.

Parameters:

pReferenceAttitude - attitude at reference date

Method Detail

getAttitude

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

Compute the attitude corresponding to an orbital state.

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

getReferenceAttitude

public final Attitude getReferenceAttitude()

Get the reference attitude.

Returns:

reference attitude