org.orekit.forces.empirical

Interface AccelerationModel

All Known Implementing Classes:

HarmonicAccelerationModel, PolynomialAccelerationModel

public interface AccelerationModel

Acceleration model used by empirical force.

Since:

10.3

Author:

Bryan Cazabonne

Method Summary

Modifier and Type	Method and Description
List<ParameterDriver>	getParametersDrivers() Get the drivers for acceleration model parameters.
default void	init(SpacecraftState initialState, AbsoluteDate target) Initialize the acceleration model at the start of the propagation.
<T extends CalculusFieldElement<T>> T	signedAmplitude(FieldSpacecraftState<T> state, T[] parameters) Compute the signed amplitude of the acceleration.
double	signedAmplitude(SpacecraftState state, double[] parameters) Compute the signed amplitude of the acceleration.

Method Detail

init

default void init(SpacecraftState initialState,
                  AbsoluteDate target)

Initialize the acceleration model at the start of the propagation.

The default implementation of this method does nothing

Parameters:

initialState - spacecraft state at the start of propagation.

target - date of propagation. Not equal to initialState.getDate().

signedAmplitude

double signedAmplitude(SpacecraftState state,
                       double[] parameters)

Compute the signed amplitude of the acceleration.

The acceleration is the direction multiplied by the signed amplitude. So if signed amplitude is negative, the acceleratin is towards the opposite of the direction specified at construction.

Parameters:

state - current state information: date, kinematics, attitude

parameters - values of the force model parameters

Returns:

norm of the acceleration

signedAmplitude

<T extends CalculusFieldElement<T>> T signedAmplitude(FieldSpacecraftState<T> state,
                                                      T[] parameters)

Compute the signed amplitude of the acceleration.

The acceleration is the direction multiplied by the signed amplitude. So if signed amplitude is negative, the acceleratin is towards the opposite of the direction specified at construction.

Type Parameters:

T - type of the elements

Parameters:

state - current state information: date, kinematics, attitude

parameters - values of the force model parameters

Returns:

norm of the acceleration

getParametersDrivers

List<ParameterDriver> getParametersDrivers()

Get the drivers for acceleration model parameters.

Returns:

drivers for acceleration model parameters