fr.cnes.sirius.patrius.stela.propagation
Class StelaBasicInterpolator

java.lang.Object
  fr.cnes.sirius.patrius.stela.propagation.StelaBasicInterpolator

All Implemented Interfaces:

Serializable, OrekitStepInterpolator

public class StelaBasicInterpolator
extends Object
implements OrekitStepInterpolator

Basic Linear Step Interpolator for StelaAbstractPropagator. Does not interpolate the attitude of the spacecraft at the moment.

Since:

1.3

Version:

1.3

Author:

Cedric Dental

See Also:

Serialized Form

Concurrency :

not thread-safe

Constructor Summary

StelaBasicInterpolator()
Build a new instance from a basic propagator.

Method Summary

AbsoluteDate	getCurrentDate() Get the current grid date.
SpacecraftState	getInitialState()
AbsoluteDate	getInterpolatedDate() Get the interpolated date.
SpacecraftState	getInterpolatedState() Get the interpolated state.
AbsoluteDate	getPreviousDate() Get the previous grid date.
boolean	isForward() Check is integration direction is forward in date.
double	linearInterpolation(double linearCoeff, double before, double after) Interpolates lineary
void	setAdditionalStateProviders(List<AdditionalStateProvider> additionalStateProvidersIn) sets the additionalStateProviders
void	setInterpolatedDate(AbsoluteDate interpolatedDate) Set the interpolated date.
void	storeSC(SpacecraftState initialStateIn, SpacecraftState targetState) Store the current dates and spacecraft states.

Methods inherited from class java.lang.Object

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

Constructor Detail

StelaBasicInterpolator

public StelaBasicInterpolator()

Build a new instance from a basic propagator.

Method Detail

getCurrentDate

public AbsoluteDate getCurrentDate()

Get the current grid date.

Specified by:

getCurrentDate in interface OrekitStepInterpolator

Returns:

current grid date

getInterpolatedDate

public AbsoluteDate getInterpolatedDate()

Get the interpolated date.

If setInterpolatedDate has not been called, the date returned is the same as getCurrentDate.

Specified by:

getInterpolatedDate in interface OrekitStepInterpolator

Returns:

interpolated date

See Also:

OrekitStepInterpolator.setInterpolatedDate(AbsoluteDate), OrekitStepInterpolator.getInterpolatedState()

getInterpolatedState

public SpacecraftState getInterpolatedState()
                                     throws OrekitException

Get the interpolated state.

Specified by:

getInterpolatedState in interface OrekitStepInterpolator

Returns:

interpolated state at the current interpolation date

Throws:

OrekitException - if state cannot be interpolated or converted

See Also:

OrekitStepInterpolator.getInterpolatedDate(), OrekitStepInterpolator.setInterpolatedDate(AbsoluteDate)

getPreviousDate

public AbsoluteDate getPreviousDate()

Get the previous grid date.

Specified by:

getPreviousDate in interface OrekitStepInterpolator

Returns:

previous grid date

isForward

public boolean isForward()

Check is integration direction is forward in date.

Specified by:

isForward in interface OrekitStepInterpolator

Returns:

true if integration is forward in date

setAdditionalStateProviders

public void setAdditionalStateProviders(List<AdditionalStateProvider> additionalStateProvidersIn)

sets the additionalStateProviders

Parameters:

additionalStateProvidersIn - the list of additional State providers

setInterpolatedDate

public void setInterpolatedDate(AbsoluteDate interpolatedDate)
                         throws PropagationException

Set the interpolated date.

It is possible to set the interpolation date outside of the current step range, but accuracy will decrease as date is farther.

Specified by:

setInterpolatedDate in interface OrekitStepInterpolator

Parameters:

interpolatedDate - interpolated date to set

Throws:

PropagationException - if underlying interpolator cannot handle the date

See Also:

OrekitStepInterpolator.getInterpolatedDate(), OrekitStepInterpolator.getInterpolatedState()

linearInterpolation

public double linearInterpolation(double linearCoeff,
                                  double before,
                                  double after)

Interpolates lineary

Parameters:

linearCoeff - the linear coefficient

before - the previous state

after - the current state

Returns:

inter the interpolated value

storeSC

public void storeSC(SpacecraftState initialStateIn,
                    SpacecraftState targetState)
             throws PropagationException

Store the current dates and spacecraft states.

Parameters:

initialStateIn - the initial state

targetState - the target state

Throws:

PropagationException - if the state cannot be propagated at specified date

getInitialState

public SpacecraftState getInitialState()

Returns:

the initialState