org.orekit.forces.gravity

Class SolidTides

java.lang.Object

org.orekit.forces.AbstractForceModel

org.orekit.forces.gravity.SolidTides

All Implemented Interfaces:

ForceModel

public class SolidTides
extends AbstractForceModel

Solid tides force model.

Since:

6.1

Author:

Luc Maisonobe

Field Summary

Fields

Modifier and Type	Field and Description
static int	DEFAULT_POINTS Default number of points tides field sampling.
static double	DEFAULT_STEP Default step for tides field sampling (seconds).

Constructor Summary

Constructors

Constructor and Description
SolidTides(Frame centralBodyFrame, double ae, double mu, TideSystem centralTideSystem, boolean poleTide, double step, int nbPoints, IERSConventions conventions, UT1Scale ut1, CelestialBody... bodies) Simple constructor.
SolidTides(Frame centralBodyFrame, double ae, double mu, TideSystem centralTideSystem, IERSConventions conventions, UT1Scale ut1, CelestialBody... bodies) Simple constructor.

Method Summary

Modifier and Type	Method and Description
<T extends RealFieldElement<T>> FieldVector3D<T>	acceleration(FieldSpacecraftState<T> s, T[] parameters) Compute acceleration.
Vector3D	acceleration(SpacecraftState s, double[] parameters) Compute acceleration.
boolean	dependsOnPositionOnly() Check if force models depends on position only.
Stream<EventDetector>	getEventsDetectors() Get the discrete events related to the model.
<T extends RealFieldElement<T>> Stream<FieldEventDetector<T>>	getFieldEventsDetectors(Field<T> field) Get the discrete events related to the model.
ParameterDriver[]	getParametersDrivers() Get the drivers for force model parameters.

Methods inherited from class org.orekit.forces.AbstractForceModel

complainIfNotSupported, getParameterDriver, isSupported

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.orekit.forces.ForceModel

addContribution, addContribution, getParameters, getParameters, init

Field Detail

DEFAULT_STEP

public static final double DEFAULT_STEP

Default step for tides field sampling (seconds).

See Also:

Constant Field Values

DEFAULT_POINTS

public static final int DEFAULT_POINTS

Default number of points tides field sampling.

See Also:

Constant Field Values

Constructor Detail

SolidTides

public SolidTides(Frame centralBodyFrame,
                  double ae,
                  double mu,
                  TideSystem centralTideSystem,
                  IERSConventions conventions,
                  UT1Scale ut1,
                  CelestialBody... bodies)
           throws OrekitException

Simple constructor.

This constructor uses pole tides, the default step and default number of points for the tides field interpolation.

Parameters:

centralBodyFrame - rotating body frame

ae - central body reference radius

mu - central body attraction coefficient

centralTideSystem - tide system used in the central attraction model

conventions - IERS conventions used for loading Love numbers

ut1 - UT1 time scale

bodies - tide generating bodies (typically Sun and Moon)

Throws:

OrekitException - if the Love numbers embedded in the library cannot be read

See Also:

DEFAULT_STEP, DEFAULT_POINTS, SolidTides(Frame, double, double, TideSystem, boolean, double, int, IERSConventions, UT1Scale, CelestialBody...)

SolidTides

public SolidTides(Frame centralBodyFrame,
                  double ae,
                  double mu,
                  TideSystem centralTideSystem,
                  boolean poleTide,
                  double step,
                  int nbPoints,
                  IERSConventions conventions,
                  UT1Scale ut1,
                  CelestialBody... bodies)
           throws OrekitException

Simple constructor.

Parameters:

centralBodyFrame - rotating body frame

ae - central body reference radius

mu - central body attraction coefficient

centralTideSystem - tide system used in the central attraction model

poleTide - if true, pole tide is computed

step - time step between sample points for interpolation

nbPoints - number of points to use for interpolation, if less than 2 then no interpolation is performed (thus greatly increasing computation cost)

conventions - IERS conventions used for loading Love numbers

ut1 - UT1 time scale

bodies - tide generating bodies (typically Sun and Moon)

Throws:

OrekitException - if the Love numbers embedded in the library cannot be read

Method Detail

dependsOnPositionOnly

public boolean dependsOnPositionOnly()

Check if force models depends on position only.

Returns:

true if force model depends on position only, false if it depends on velocity, either directly or due to a dependency on attitude

acceleration

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

Compute acceleration.

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters

Returns:

acceleration in same frame as state

Throws:

OrekitException - if some specific error occurs

acceleration

public <T extends RealFieldElement<T>> FieldVector3D<T> acceleration(FieldSpacecraftState<T> s,
                                                                     T[] parameters)
                                                              throws OrekitException

Compute acceleration.

Type Parameters:

T - type of the elements

Parameters:

s - current state information: date, kinematics, attitude

parameters - values of the force model parameters

Returns:

acceleration in same frame as state

Throws:

OrekitException - if some specific error occurs

getEventsDetectors

public Stream<EventDetector> getEventsDetectors()

Get the discrete events related to the model.

Returns:

stream of events detectors

getFieldEventsDetectors

public <T extends RealFieldElement<T>> Stream<FieldEventDetector<T>> getFieldEventsDetectors(Field<T> field)

Get the discrete events related to the model.

Type Parameters:

T - extends RealFieldElement

Parameters:

field - field to which the state belongs

Returns:

stream of events detectors

getParametersDrivers

public ParameterDriver[] getParametersDrivers()

Get the drivers for force model parameters.

Returns:

drivers for force model parameters