org.orekit.frames

Class EclipticProvider

java.lang.Object

org.orekit.frames.EclipticProvider

All Implemented Interfaces:

Serializable, TransformProvider

public class EclipticProvider
extends Object
implements TransformProvider

An inertial frame aligned with the ecliptic.

The IAU defines the ecliptic as "the plane perpendicular to the mean heliocentric orbital angular momentum vector of the Earth-Moon barycentre in the BCRS (IAU 2006 Resolution B1)." The +z axis is aligned with the angular momentum vector, and the +x axis is aligned with +x axis of MOD.

This implementation agrees with the JPL 406 ephemerides to within 0.5 arc seconds.

Since:

7.0

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
EclipticProvider(IERSConventions conventions) Create a transform provider from MOD to an ecliptically aligned frame.

Method Summary

Modifier and Type	Method and Description
Transform	getTransform(AbsoluteDate date) Get the Transform corresponding to specified date.
<T extends RealFieldElement<T>> FieldTransform<T>	getTransform(FieldAbsoluteDate<T> date) Get the FieldTransform corresponding to specified date.

Methods inherited from class java.lang.Object

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

Constructor Detail

EclipticProvider

public EclipticProvider(IERSConventions conventions)
                 throws OrekitException

Create a transform provider from MOD to an ecliptically aligned frame.

Parameters:

conventions - IERS conventions

Throws:

OrekitException - if the mean obliquity of the ecliptic function can not be loaded.

Method Detail

getTransform

public Transform getTransform(AbsoluteDate date)
                       throws OrekitException

Description copied from interface: TransformProvider

Get the Transform corresponding to specified date.

Specified by:

getTransform in interface TransformProvider

Parameters:

date - current date

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date

getTransform

public <T extends RealFieldElement<T>> FieldTransform<T> getTransform(FieldAbsoluteDate<T> date)
                                                               throws OrekitException

Description copied from interface: TransformProvider

Get the FieldTransform corresponding to specified date.

Specified by:

getTransform in interface TransformProvider

Type Parameters:

T - type of the field elements

Parameters:

date - current date

Returns:

transform at specified date

Throws:

OrekitException - if transform cannot be computed at given date