Package org.orekit.propagation.conversion.osc2mean

Class BrouwerLyddaneTheory

java.lang.Object

org.orekit.propagation.conversion.osc2mean.BrouwerLyddaneTheory

All Implemented Interfaces:

MeanTheory

public class BrouwerLyddaneTheory
extends Object
implements MeanTheory

Brouwer-Lyddane theory for osculating to mean orbit conversion.

Since:

13.0

Author:

Pascal Parraud

Field Summary

Fields

Modifier and Type	Field	Description
static final String	THEORY	Theory used for converting from osculating to mean orbit.

Constructor Summary

Constructors

Constructor	Description
BrouwerLyddaneTheory(double referenceRadius, double mu, double c20, double c30, double c40, double c50, double m2Value)	Constructor.
BrouwerLyddaneTheory(UnnormalizedSphericalHarmonicsProvider provider, double m2Value)	Constructor.

Method Summary

Modifier and Type	Method	Description
double	getReferenceRadius()	Gets reference radius of the central body (m).
String	getTheoryName()	Gets the name of the theory used for osculating to mean conversion.
<T extends CalculusFieldElement<T>> FieldOrbit<T>	meanToOsculating(FieldOrbit<T> mean)	Gets osculating orbit from mean orbit.
Orbit	meanToOsculating(Orbit mean)	Gets osculating orbit from mean orbit.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.propagation.conversion.osc2mean.MeanTheory

initialize, initialize, postprocessing, postprocessing, preprocessing, preprocessing

Field Details

THEORY

public static final String THEORY

Theory used for converting from osculating to mean orbit.

See Also:

• Constant Field Values

Constructor Details

BrouwerLyddaneTheory

public BrouwerLyddaneTheory(UnnormalizedSphericalHarmonicsProvider provider,
 double m2Value)

Constructor.

Parameters:

provider - unnormalized spherical harmonics provider

m2Value - value of empirical drag coefficient in rad/s². If equal to BrouwerLyddanePropagator.M2 drag is not computed

BrouwerLyddaneTheory

public BrouwerLyddaneTheory(double referenceRadius,
 double mu,
 double c20,
 double c30,
 double c40,
 double c50,
 double m2Value)

Constructor.

Parameters:

referenceRadius - reference radius of the Earth for the potential model (m)

mu - central attraction coefficient (m³/s²)

c20 - un-normalized zonal coefficient (about -1.08e-3 for Earth)

c30 - un-normalized zonal coefficient (about +2.53e-6 for Earth)

c40 - un-normalized zonal coefficient (about +1.62e-6 for Earth)

c50 - un-normalized zonal coefficient (about +2.28e-7 for Earth)

m2Value - value of empirical drag coefficient in rad/s². If equal to BrouwerLyddanePropagator.M2 drag is not computed

Method Details

getTheoryName

public String getTheoryName()

Gets the name of the theory used for osculating to mean conversion.

Specified by:

getTheoryName in interface MeanTheory

Returns:

the actual theory

getReferenceRadius

public double getReferenceRadius()

Gets reference radius of the central body (m).

Specified by:

getReferenceRadius in interface MeanTheory

Returns:

reference radius of the central body

meanToOsculating

public Orbit meanToOsculating(Orbit mean)

Gets osculating orbit from mean orbit.

Specified by:

meanToOsculating in interface MeanTheory

Parameters:

mean - mean orbit

Returns:

osculating orbit

meanToOsculating

public <T extends CalculusFieldElement<T>>
FieldOrbit<T> meanToOsculating(FieldOrbit<T> mean)

Gets osculating orbit from mean orbit.

Specified by:

meanToOsculating in interface MeanTheory

Type Parameters:

T - type of the field elements

Parameters:

mean - mean orbit

Returns:

osculating orbit