org.orekit.frames.transformations
Class CIRFProvider

java.lang.Object
  org.orekit.frames.transformations.CIRFProvider

All Implemented Interfaces:

Serializable, TransformProvider

public final class CIRFProvider
extends Object
implements TransformProvider

Celestial Intermediate Reference Frame 2000.

This frame includes both precession and nutation effects according to the new IAU-2000 model. The single model replaces the two separate models used before: IAU-76 precession (Lieske) and IAU-80 theory of nutation (Wahr). It must be used with the Earth Rotation Angle (REA) defined by Capitaine's model and not IAU-82 sidereal time which is consistent with the previous models only.

Its parent frame is the GCRF frame.

See Also:

Serialized Form

Constructor Summary

CIRFProvider()
Simple constructor.

Method Summary

Transform	getTransform(AbsoluteDate date) Get the transform from GCRF to CIRF2000 at the specified date.
Transform	getTransform(AbsoluteDate date, boolean computeSpinDerivatives) Get the transform from GCRF to CIRF2000 at the specified date.
Transform	getTransform(AbsoluteDate date, FramesConfiguration config) Get the transform from GCRF to CIRF2000 at the specified date.
Transform	getTransform(AbsoluteDate date, FramesConfiguration config, boolean computeSpinDerivatives) Get the transform from GCRF to CIRF2000 at the specified date.

Methods inherited from class java.lang.Object

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

Constructor Detail

CIRFProvider

public CIRFProvider()

Simple constructor.

See Also:

Frame

Method Detail

getTransform

public Transform getTransform(AbsoluteDate date,
                              FramesConfiguration config)
                       throws OrekitException

Get the transform from GCRF to CIRF2000 at the specified date.

The transform considers the nutation and precession effects from IERS data.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - new value of the date

config - frames configuration to use

Returns:

transform at the specified date library cannot be read

Throws:

OrekitException - if the nutation model data embedded in the library cannot be read

getTransform

public Transform getTransform(AbsoluteDate date)
                       throws OrekitException

Get the transform from GCRF to CIRF2000 at the specified date.

The transform considers the nutation and precession effects from IERS data.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - new value of the date

Returns:

transform at the specified date

Throws:

OrekitException - if the nutation model data embedded in the library cannot be read

getTransform

public Transform getTransform(AbsoluteDate date,
                              boolean computeSpinDerivatives)
                       throws OrekitException

Get the transform from GCRF to CIRF2000 at the specified date.

The transform considers the nutation and precession effects from IERS data.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - new value of the date

computeSpinDerivatives - not used

Returns:

transform at the specified date

Throws:

OrekitException - if the nutation model data embedded in the library cannot be read

getTransform

public Transform getTransform(AbsoluteDate date,
                              FramesConfiguration config,
                              boolean computeSpinDerivatives)
                       throws OrekitException

Get the transform from GCRF to CIRF2000 at the specified date.

The transform considers the nutation and precession effects from IERS data.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - new value of the date

config - frames configuration to use

computeSpinDerivatives - not used

Returns:

transform at the specified date library cannot be read

Throws:

OrekitException - if the nutation model data embedded in the library cannot be read