org.orekit.propagation.semianalytical.dsst.forces

Class DSSTJ2SquaredClosedFormContext

java.lang.Object

org.orekit.propagation.semianalytical.dsst.forces.ForceModelContext

org.orekit.propagation.semianalytical.dsst.forces.DSSTJ2SquaredClosedFormContext

public class DSSTJ2SquaredClosedFormContext
extends ForceModelContext

This class is a container for the common parameters used in DSSTJ2SquaredClosedForm.

It performs parameters initialization at each integration step for the second-order J2-squared contribution to the central body gravitational perturbation.

Since:

12.0

Author:

Bryan Cazabonne

Constructor Summary

Constructors

Constructor and Description
DSSTJ2SquaredClosedFormContext(AuxiliaryElements auxiliaryElements, UnnormalizedSphericalHarmonicsProvider provider) Simple constructor.

Method Summary

Modifier and Type	Method and Description
double	getA4() Get the semi major axis to the power 4.
double	getAlpha4() Get the equatorial radius of the central body to the power 4.
double	getC() Get the cosine of the inclination.
double	getEta() Get the eta value.
double	getS2() Get the sine of the inclination to the power 2.

Methods inherited from class org.orekit.propagation.semianalytical.dsst.forces.ForceModelContext

getAuxiliaryElements

Methods inherited from class java.lang.Object

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

Constructor Detail

DSSTJ2SquaredClosedFormContext

public DSSTJ2SquaredClosedFormContext(AuxiliaryElements auxiliaryElements,
                                      UnnormalizedSphericalHarmonicsProvider provider)

Simple constructor.

Parameters:

auxiliaryElements - auxiliary elements related to the current orbit

provider - provider for spherical harmonics

Method Detail

getAlpha4

public double getAlpha4()

Get the equatorial radius of the central body to the power 4.

Returns:

the equatorial radius of the central body to the power 4

getA4

public double getA4()

Get the semi major axis to the power 4.

Returns:

the semi major axis to the power 4

getEta

public double getEta()

Get the eta value.

Returns:

sqrt(1 - e * e)

getC

public double getC()

Get the cosine of the inclination.

Returns:

the cosine of the inclination

getS2

public double getS2()

Get the sine of the inclination to the power 2.

Returns:

the sine of the inclination to the power 2