Package org.orekit.control.indirect.adjoint

Class CartesianAdjointJ2Term

java.lang.Object

org.orekit.control.indirect.adjoint.AbstractCartesianAdjointEquationTerm

org.orekit.control.indirect.adjoint.AbstractCartesianAdjointGravitationalTerm

org.orekit.control.indirect.adjoint.CartesianAdjointJ2Term

All Implemented Interfaces:

CartesianAdjointEquationTerm

public class CartesianAdjointJ2Term
extends AbstractCartesianAdjointGravitationalTerm

Class defining a (constant) J2 contributions in the adjoint equations for Cartesian coordinates. If present, then the propagator should also include a constant J2 term (oblateness) of the central body.

Since:

12.2

Author:

Romain Serra

See Also:

CartesianAdjointEquationTerm, J2OnlyPerturbation

Constructor Summary

Constructors

Constructor	Description
CartesianAdjointJ2Term(double mu, double rEq, double j2, Frame j2Frame)	Constructor.

Method Summary

Modifier and Type	Method	Description
Vector3D	getAcceleration(AbsoluteDate date, double[] stateVariables, Frame frame)	Compute the acceleration vector.
<T extends CalculusFieldElement<T>> FieldVector3D<T>	getFieldAcceleration(FieldAbsoluteDate<T> date, T[] stateVariables, Frame frame)	Compute the acceleration vector.
double	getJ2()	Getter for J2.
double[]	getPositionAdjointContribution(AbsoluteDate date, double[] stateVariables, double[] adjointVariables, Frame frame)	Computes the contribution to position adjoint derivatives.
<T extends CalculusFieldElement<T>> T[]	getPositionAdjointFieldContribution(FieldAbsoluteDate<T> date, T[] stateVariables, T[] adjointVariables, Frame frame)	Computes the contribution to position adjoint derivatives.
double	getrEq()	Getter for central body equatorial radius.

Methods inherited from class org.orekit.control.indirect.adjoint.AbstractCartesianAdjointGravitationalTerm

getFieldRatesContribution, getMu, getRatesContribution

Methods inherited from class org.orekit.control.indirect.adjoint.AbstractCartesianAdjointEquationTerm

buildFieldGradientCartesianVector, buildGradientCartesianVector, getFieldHamiltonianContribution, getHamiltonianContribution

Methods inherited from class java.lang.Object

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

Constructor Detail

CartesianAdjointJ2Term

public CartesianAdjointJ2Term(double mu,
                              double rEq,
                              double j2,
                              Frame j2Frame)

Constructor.

Parameters:

mu - central body gravitational parameter.

rEq - equatorial radius

j2 - J2 coefficient

j2Frame - J2 frame

Method Detail

getrEq

public double getrEq()

Getter for central body equatorial radius.

Returns:

equatorial radius

getJ2

public double getJ2()

Getter for J2.

Returns:

J2 coefficient

getPositionAdjointContribution

public double[] getPositionAdjointContribution(AbsoluteDate date,
                                               double[] stateVariables,
                                               double[] adjointVariables,
                                               Frame frame)

Computes the contribution to position adjoint derivatives.

Specified by:

getPositionAdjointContribution in class AbstractCartesianAdjointGravitationalTerm

Parameters:

date - date

stateVariables - state variables

adjointVariables - adjoint variables

frame - propagation frame

Returns:

contribution to position adjoint derivatives

getPositionAdjointFieldContribution

public <T extends CalculusFieldElement<T>> T[] getPositionAdjointFieldContribution(FieldAbsoluteDate<T> date,
                                                                                   T[] stateVariables,
                                                                                   T[] adjointVariables,
                                                                                   Frame frame)

Computes the contribution to position adjoint derivatives.

Specified by:

getPositionAdjointFieldContribution in class AbstractCartesianAdjointGravitationalTerm

Type Parameters:

T - field type

Parameters:

date - date

stateVariables - state variables

adjointVariables - adjoint variables

frame - propagation frame

Returns:

contribution to position adjoint derivatives

getAcceleration

public Vector3D getAcceleration(AbsoluteDate date,
                                double[] stateVariables,
                                Frame frame)

Compute the acceleration vector.

Specified by:

getAcceleration in class AbstractCartesianAdjointEquationTerm

Parameters:

date - date

stateVariables - state variables

frame - propagation frame

Returns:

acceleration vector

getFieldAcceleration

public <T extends CalculusFieldElement<T>> FieldVector3D<T> getFieldAcceleration(FieldAbsoluteDate<T> date,
                                                                                 T[] stateVariables,
                                                                                 Frame frame)

Compute the acceleration vector.

Specified by:

getFieldAcceleration in class AbstractCartesianAdjointEquationTerm

Type Parameters:

T - field type

Parameters:

date - date

stateVariables - state variables

frame - propagation frame

Returns:

acceleration vector