Package org.orekit.forces.gravity

Class LenseThirringRelativity

java.lang.Object

org.orekit.forces.gravity.LenseThirringRelativity

All Implemented Interfaces:

ForceModel, EventDetectorsProvider, BaseParameterDriversProvider<ParameterDriver,ParameterObserver>, ParameterDriversProvider

public class LenseThirringRelativity
extends Object
implements ForceModel

Lense-Thirring post-Newtonian correction force due to general relativity.

Lense-Thirring term causes a precession of the orbital plane at a rate of the order of 0.8 mas per year (geostationary) to 180 mas per year (low orbit).

Since:

10.3

Author:

Bryan Cazabonne

See Also:

• "Petit, G. and Luzum, B. (eds.), IERS Conventions (2010), Chapter 10, General relativistic models for space-time coordinates and equations of motion (2010)"

Field Summary

Fields inherited from interface org.orekit.propagation.events.EventDetectorsProvider

DATATION_ACCURACY

Constructor Summary

Constructors

Constructor	Description
LenseThirringRelativity(double gm, Frame bodyFrame)	Constructor.

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> FieldVector3D<T>	acceleration(FieldSpacecraftState<T> s, T[] parameters)	Compute acceleration.
Vector3D	acceleration(SpacecraftState s, double[] parameters)	Compute acceleration.
List<ParameterDriver>	getParametersDrivers()	Get the drivers for parameters.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.utils.drivers.BaseParameterDriversProvider

getParameterDriver, getParameterDriverWithSubstring, isSupported

Methods inherited from interface org.orekit.propagation.events.EventDetectorsProvider

getDateDetector, getEventDetectors, getFieldDateDetector, getFieldEventDetectors

Methods inherited from interface org.orekit.forces.ForceModel

addContribution, addContribution, dependsOnAttitudeRate, dependsOnPositionOnly, getEventDetectors, getFieldEventDetectors, getMassDerivative, getMassDerivative, init, init

Methods inherited from interface org.orekit.utils.drivers.ParameterDriversProvider

getParameters, getParameters

Constructor Details

LenseThirringRelativity

public LenseThirringRelativity(double gm,
 Frame bodyFrame)

Constructor.

Parameters:

gm - Earth's gravitational parameter.

bodyFrame - central body frame

Method Details

acceleration

public Vector3D acceleration(SpacecraftState s,
 double[] parameters)

Compute acceleration.

Specified by:

acceleration in interface ForceModel

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters at state date, only 1 value for each parameterDriver

Returns:

acceleration in same frame as state

acceleration

public <T extends CalculusFieldElement<T>>
FieldVector3D<T> acceleration(FieldSpacecraftState<T> s,
 T[] parameters)

Compute acceleration.

Specified by:

acceleration in interface ForceModel

Type Parameters:

T - type of the elements

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters at state date, only 1 value for each parameterDriver

Returns:

acceleration in same frame as state

getParametersDrivers

public List<ParameterDriver> getParametersDrivers()

Get the drivers for parameters. By default, no parameters. Override, for instance, to enable partial derivatives.

Specified by:

getParametersDrivers in interface BaseParameterDriversProvider<ParameterDriver,ParameterObserver>

Specified by:

getParametersDrivers in interface ForceModel

Returns:

drivers for parameters