Package org.orekit.orbits

Class AbstractOrbitFactory<P extends Orbit>

java.lang.Object

org.orekit.orbits.AbstractOrbitalStateFactory<P>

org.orekit.orbits.AbstractOrbitFactory<P>

Type Parameters:

P - type of the orbits

All Implemented Interfaces:

Cloneable, OrbitalStateFactory<P>

Direct Known Subclasses:

CartesianOrbitFactory, CircularOrbitFactory, EquinoctialOrbitFactory, KeplerianOrbitFactory

public abstract class AbstractOrbitFactory<P extends Orbit>
extends AbstractOrbitalStateFactory<P>

Factory for orbits.

Since:

14.0

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractOrbitFactory(double positionScale, P template, PositionAngleType positionAngleType)	Simple constructor.

Method Summary

Modifier and Type	Method	Description
RealMatrix	getJacobianWrtCartesian()	Get the Jacobian of the orbital parameters with respect to the Cartesian coordinates.
RealMatrix	getJacobianWrtParameters()	Get the Jacobian of the Cartesian coordinates with respect to the orbital parameters.
protected double[]	toArray(Orbit orbit)	Convert an input into an array suitable to feed orbital parameters drivers.

Methods inherited from class org.orekit.orbits.AbstractOrbitalStateFactory

clone, getDate, getFrame, getMu, getNonKeplerianParametersDrivers, getOrbitalParametersDrivers, getOrbitParamsType, getPositionAngleType, reset, setDate, setFrame, setMu, setPositionAngleType

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.orbits.OrbitalStateFactory

createFromDrivers

Constructor Details

AbstractOrbitFactory

protected AbstractOrbitFactory(double positionScale,
 P template,
 PositionAngleType positionAngleType)

Simple constructor.

The template orbit is used as a model. It defines the inertial frame, the central attraction coefficient, the orbit type, and is also used together with the positionScale to convert from the normalized parameters used by the callers of this factory to the real orbital parameters.

Parameters:

positionScale - position scale used to scale the orbital drivers

template - template orbit

positionAngleType - position angle type to use

Method Details

toArray

protected double[] toArray(Orbit orbit)

Convert an input into an array suitable to feed orbital parameters drivers.

Specified by:

toArray in class AbstractOrbitalStateFactory<P extends Orbit>

Parameters:

orbit - orbit to convert

Returns:

arrays corresponding to orbit

getJacobianWrtParameters

public RealMatrix getJacobianWrtParameters()

Get the Jacobian of the Cartesian coordinates with respect to the orbital parameters.

The Jacobian is evaluated at the current drivers values, at the factory date and in the factory frame.

The orbital parameters being a regular orbit type, the Jacobian is the closed-form one provided by Orbit.getJacobianWrtParameters(PositionAngleType, double[][]).

Returns:

jacobian matrix dC/dB, where C are the Cartesian coordinates and B the orbital parameters this factory is built upon

getJacobianWrtCartesian

public RealMatrix getJacobianWrtCartesian()

Get the Jacobian of the orbital parameters with respect to the Cartesian coordinates.

This is the inverse of OrbitalStateFactory.getJacobianWrtParameters(), and it is evaluated under the very same conditions..

This implementation inverts OrbitalStateFactory.getJacobianWrtParameters() numerically, using the same decomposition as Orbit does for its own Jacobian matrices.

Pure delegation to Orbit.getJacobianWrtCartesian(PositionAngleType, double[][])

Specified by:

getJacobianWrtCartesian in interface OrbitalStateFactory<P extends Orbit>

Overrides:

getJacobianWrtCartesian in class AbstractOrbitalStateFactory<P extends Orbit>

Returns:

jacobian matrix dB/dC, where B are the orbital parameters this factory is built upon and C the Cartesian coordinates