org.orekit.propagation.analytical

Class AggregateBoundedPropagator

java.lang.Object

org.orekit.propagation.AbstractPropagator

org.orekit.propagation.analytical.AbstractAnalyticalPropagator

org.orekit.propagation.analytical.AggregateBoundedPropagator

All Implemented Interfaces:

BoundedPropagator, Propagator, PVCoordinatesProvider

public class AggregateBoundedPropagator
extends AbstractAnalyticalPropagator
implements BoundedPropagator

A BoundedPropagator that covers a larger time span from several constituent propagators that cover shorter time spans.

Author:

Evan Ward

See Also:

AggregateBoundedPropagator(Collection)

Field Summary

Fields inherited from interface org.orekit.propagation.Propagator

DEFAULT_LAW, DEFAULT_MASS, EPHEMERIS_GENERATION_MODE, MASTER_MODE, SLAVE_MODE

Constructor Summary

Constructors

Constructor and Description
AggregateBoundedPropagator(Collection<? extends BoundedPropagator> propagators) Create a propagator by concatenating several BoundedPropagators.

Method Summary

Modifier and Type	Method and Description
SpacecraftState	getInitialState() Get the propagator initial state.
protected double	getMass(AbsoluteDate date) Get the mass.
AbsoluteDate	getMaxDate() Get the last date of the range.
AbsoluteDate	getMinDate() Get the first date of the range.
TimeStampedPVCoordinates	getPVCoordinates(AbsoluteDate date, Frame frame) Get the PVCoordinates of the body in the selected frame.
protected Orbit	propagateOrbit(AbsoluteDate date) Extrapolate an orbit up to a specific target date.
void	resetInitialState(SpacecraftState state) Reset the propagator initial state.
protected void	resetIntermediateState(SpacecraftState state, boolean forward) Reset an intermediate state.

Methods inherited from class org.orekit.propagation.analytical.AbstractAnalyticalPropagator

acceptStep, addEventDetector, basicPropagate, clearEventsDetectors, getEventsDetectors, getGeneratedEphemeris, getPvProvider, propagate

Methods inherited from class org.orekit.propagation.AbstractPropagator

addAdditionalStateProvider, getAdditionalStateProviders, getAttitudeProvider, getFixedStepSize, getFrame, getManagedAdditionalStates, getMode, getStartDate, getStepHandler, isAdditionalStateManaged, propagate, setAttitudeProvider, setEphemerisMode, setEphemerisMode, setMasterMode, setMasterMode, setSlaveMode, setStartDate, updateAdditionalStates

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.Propagator

addAdditionalStateProvider, addEventDetector, clearEventsDetectors, getAdditionalStateProviders, getAttitudeProvider, getEventsDetectors, getFrame, getGeneratedEphemeris, getManagedAdditionalStates, getMode, isAdditionalStateManaged, propagate, propagate, setAttitudeProvider, setEphemerisMode, setEphemerisMode, setMasterMode, setMasterMode, setSlaveMode

Constructor Detail

AggregateBoundedPropagator

public AggregateBoundedPropagator(Collection<? extends BoundedPropagator> propagators)
                           throws OrekitException

Create a propagator by concatenating several BoundedPropagators.

Parameters:

propagators - that provide the backing data for this instance. There must be at least one propagator in the collection. If there are gaps between the BoundedPropagator.getMaxDate() of one propagator and the BoundedPropagator.getMinDate() of the next propagator an exception may be thrown by any method of this class at any time. If there are overlaps between the the BoundedPropagator.getMaxDate() of one propagator and the BoundedPropagator.getMinDate() of the next propagator then the propagator with the latest BoundedPropagator.getMinDate() is used.

Throws:

OrekitException - if propagators does not have at least one element.

Method Detail

getPVCoordinates

public TimeStampedPVCoordinates getPVCoordinates(AbsoluteDate date,
                                                 Frame frame)
                                          throws OrekitException

Description copied from class: AbstractPropagator

Get the PVCoordinates of the body in the selected frame.

Specified by:

getPVCoordinates in interface PVCoordinatesProvider

Overrides:

getPVCoordinates in class AbstractPropagator

Parameters:

date - current date

frame - the frame where to define the position

Returns:

time-stamped position/velocity of the body (m and m/s)

Throws:

OrekitException - if position cannot be computed in given frame

propagateOrbit

protected Orbit propagateOrbit(AbsoluteDate date)
                        throws OrekitException

Description copied from class: AbstractAnalyticalPropagator

Extrapolate an orbit up to a specific target date.

Specified by:

propagateOrbit in class AbstractAnalyticalPropagator

Parameters:

date - target date for the orbit

Returns:

extrapolated parameters

Throws:

OrekitException - if some parameters are out of bounds

getMinDate

public AbsoluteDate getMinDate()

Description copied from interface: BoundedPropagator

Get the first date of the range.

Specified by:

getMinDate in interface BoundedPropagator

Returns:

the first date of the range

getMaxDate

public AbsoluteDate getMaxDate()

Description copied from interface: BoundedPropagator

Get the last date of the range.

Specified by:

getMaxDate in interface BoundedPropagator

Returns:

the last date of the range

getMass

protected double getMass(AbsoluteDate date)
                  throws OrekitException

Description copied from class: AbstractAnalyticalPropagator

Get the mass.

Specified by:

getMass in class AbstractAnalyticalPropagator

Parameters:

date - target date for the orbit

Returns:

mass mass

Throws:

OrekitException - if some parameters are out of bounds

getInitialState

public SpacecraftState getInitialState()
                                throws OrekitException

Description copied from class: AbstractPropagator

Get the propagator initial state.

Specified by:

getInitialState in interface Propagator

Overrides:

getInitialState in class AbstractPropagator

Returns:

initial state

Throws:

OrekitException - if state cannot be retrieved

resetIntermediateState

protected void resetIntermediateState(SpacecraftState state,
                                      boolean forward)
                               throws OrekitException

Description copied from class: AbstractAnalyticalPropagator

Reset an intermediate state.

Specified by:

resetIntermediateState in class AbstractAnalyticalPropagator

Parameters:

state - new intermediate state to consider

forward - if true, the intermediate state is valid for propagations after itself

Throws:

OrekitException - if initial state cannot be reset

resetInitialState

public void resetInitialState(SpacecraftState state)
                       throws OrekitException

Description copied from class: AbstractPropagator

Reset the propagator initial state.

Specified by:

resetInitialState in interface Propagator

Overrides:

resetInitialState in class AbstractPropagator

Parameters:

state - new initial state to consider

Throws:

OrekitException - if initial state cannot be reset