org.orekit.frames.configuration
Class PrecessionNutation

java.lang.Object
  org.orekit.frames.configuration.PrecessionNutation

All Implemented Interfaces:

Serializable

public class PrecessionNutation
extends Object
implements Serializable

This class contains the precession nutation model used within the FramesConfigurationImplementation class.

Since:

1.2

Version:

$Id: PrecessionNutation.java 8321 2013-04-02 14:27:39Z CardosoP $

Author:

Julie Anton, Rami Houdroge

See Also:

Serialized Form

Concurrency :

conditionally thread-safe

Concurrency comment :

thread safe if the underlying PrecessionNutationModel is thread safe

Constructor Summary

PrecessionNutation(boolean useEopData, PrecessionNutationModel iersPrecessionNutation)
Constructor.

Method Summary

double[]	getCIPMotion(AbsoluteDate date) Compute the CIP pole coordinates at given date.
double[]	getCIPMotionTimeDerivative(AbsoluteDate date) Compute the CIP pole coordinate derivatives at given date.
PrecessionNutationModel	getPrecessionNutationModel()
boolean	useEopData() Use EOP data for nutation correction.

Methods inherited from class java.lang.Object

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

Constructor Detail

PrecessionNutation

public PrecessionNutation(boolean useEopData,
                          PrecessionNutationModel iersPrecessionNutation)

Constructor. Create an instance with given Precession Nutation model and nutation corrections flag.

Parameters:

useEopData - true if nutation corrections from EOP data are to be used, false otherwise.

iersPrecessionNutation - model of precession nutation to use.

Method Detail

getCIPMotion

public double[] getCIPMotion(AbsoluteDate date)

Compute the CIP pole coordinates at given date.

Parameters:

date - date at which to compute CIP coordinates

Returns:

the CIP pole coordinates

getCIPMotionTimeDerivative

public double[] getCIPMotionTimeDerivative(AbsoluteDate date)

Compute the CIP pole coordinate derivatives at given date.

Parameters:

date - date at which to compute CIP coordinate derivatives

Returns:

the CIP pole coordinates

useEopData

public boolean useEopData()

Use EOP data for nutation correction.

Returns:

true if EOP data is to be used, flase if not.

getPrecessionNutationModel

public PrecessionNutationModel getPrecessionNutationModel()

Returns:

the precession nutation model