org.orekit.frames

Class GTODProvider

java.lang.Object

org.orekit.frames.GTODProvider

All Implemented Interfaces:

Serializable, TransformProvider

public class GTODProvider
extends Object
implements TransformProvider

Greenwich True Of Date Frame, also known as True of Date Rotating frame (TDR) or Greenwich Rotating Coordinate frame (GCR).

This frame handles the sidereal time according to IAU-82 model.

Its parent frame is the TODProvider.

The pole motion is not applied here.

Author:

Pascal Parraud, Thierry Ceolin

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	GTODProvider(IERSConventions conventions, EOPHistory eopHistory) Simple constructor.

Method Summary

Methods

Modifier and Type	Method and Description
Transform	getTransform(AbsoluteDate date) Get the transform from TOD at specified date.

Methods inherited from class java.lang.Object

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

Constructor Detail

GTODProvider

protected GTODProvider(IERSConventions conventions,
            EOPHistory eopHistory)
                throws OrekitException

Simple constructor.

Parameters:

conventions - IERS conventions to use

eopHistory - EOP history (may be null)

Throws:

OrekitException - if EOP parameters are desired but cannot be read

Method Detail

getTransform

public Transform getTransform(AbsoluteDate date)
                       throws OrekitException

Get the transform from TOD at specified date.

The update considers the Earth rotation 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