Package org.orekit.bodies

Class JPLLibration

java.lang.Object

org.orekit.bodies.JPLLibration

public class JPLLibration
extends Object

A simple container for JPL libration data.

As described in Internal Format of the Ephemeris Files of JPL, there are three components for librations : phi, theta, psi, which can be returned by getLibration(org.orekit.time.AbsoluteDate), or individually by getPhi(org.orekit.time.AbsoluteDate), getTheta(org.orekit.time.AbsoluteDate), and getPsi(org.orekit.time.AbsoluteDate).

Since:

14.0

Author:

Guo Xiaozhong

Method Summary

Modifier and Type	Method	Description
Vector3D	getLibration(AbsoluteDate date)	Get the libration.
double	getPhi(AbsoluteDate date)	Get the phi component of libration.
double	getPsi(AbsoluteDate date)	Get the psi component of libration.
double	getTheta(AbsoluteDate date)	Get the theta component of libration.

Methods inherited from class java.lang.Object

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

Method Details

getLibration

public Vector3D getLibration(AbsoluteDate date)

Get the libration.

Parameters:

date - current date

Returns:

libration in radians

getPhi

public double getPhi(AbsoluteDate date)

Get the phi component of libration.

Parameters:

date - current date

Returns:

phi component of libration in radians

getTheta

public double getTheta(AbsoluteDate date)

Get the theta component of libration.

Parameters:

date - current date

Returns:

theta component of libration in radians

getPsi

public double getPsi(AbsoluteDate date)

Get the psi component of libration.

Parameters:

date - current date

Returns:

psi component of libration in radians