Package 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.

Since:

9.0

Author:

Evan Ward

See Also:

AggregateBoundedPropagator(Collection)

Field Summary

Fields inherited from interface org.orekit.propagation.Propagator

DEFAULT_MASS

Constructor Summary

Constructors

Constructor	Description
AggregateBoundedPropagator(Collection<? extends BoundedPropagator> propagators)	Create a propagator by concatenating several BoundedPropagators.
AggregateBoundedPropagator(NavigableMap<AbsoluteDate,? extends BoundedPropagator> propagators, AbsoluteDate min, AbsoluteDate max)	Create a propagator from several constituent propagators.

Method Summary

Modifier and Type	Method	Description
protected SpacecraftState	basicPropagate(AbsoluteDate date)	Propagate an orbit without any fancy features.
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.
NavigableMap<AbsoluteDate,? extends BoundedPropagator>	getPropagators()	Get an unmodifiable view of the propagators map.
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, clearEventsDetectors, getEphemerisGenerator, getEventsDetectors, getJacobiansColumnsNames, getPvProvider, propagate

Methods inherited from class org.orekit.propagation.AbstractPropagator

addAdditionalStateProvider, createHarvester, getAdditionalStateProviders, getAttitudeProvider, getFrame, getHarvester, getManagedAdditionalStates, getMultiplexer, getStartDate, initializeAdditionalStates, initializePropagation, isAdditionalStateManaged, propagate, setAttitudeProvider, setStartDate, setupMatricesComputation, stateChanged, updateAdditionalStates, updateUnmanagedStates

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, clearStepHandlers, getAdditionalStateProviders, getAttitudeProvider, getEphemerisGenerator, getEventsDetectors, getFrame, getManagedAdditionalStates, getMultiplexer, isAdditionalStateManaged, propagate, propagate, setAttitudeProvider, setStepHandler, setStepHandler, setupMatricesComputation

Methods inherited from interface org.orekit.utils.PVCoordinatesProvider

getPosition

Constructor Detail

AggregateBoundedPropagator

public AggregateBoundedPropagator(Collection<? extends BoundedPropagator> propagators)

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 BoundedPropagator.getMaxDate() of one propagator and the BoundedPropagator.getMinDate() of the next propagator then the propagator with the latest BoundedPropagator.getMinDate() is used.

AggregateBoundedPropagator

public AggregateBoundedPropagator(NavigableMap<AbsoluteDate,? extends BoundedPropagator> propagators,
                                  AbsoluteDate min,
                                  AbsoluteDate max)

Create a propagator from several constituent propagators.

Parameters:

propagators - that provide the backing data for this instance. Each propagator is used from the date of it's key in the map until the date of the next key. The first propagator is also used before the first key and the last propagator after the last key.

min - the value for getMinDate().

max - the value for getMaxDate().

Method Detail

getPropagators

public NavigableMap<AbsoluteDate,? extends BoundedPropagator> getPropagators()

Get an unmodifiable view of the propagators map.

The key of the map entries are the min dates of each propagator.

Returns:

unmodifiable view of the propagators map

Since:

12.0

basicPropagate

protected SpacecraftState basicPropagate(AbsoluteDate date)

Description copied from class: AbstractAnalyticalPropagator

Propagate an orbit without any fancy features.

This method is similar in spirit to the AbstractAnalyticalPropagator.propagate(org.orekit.time.AbsoluteDate, org.orekit.time.AbsoluteDate) method, except that it does not call any handler during propagation, nor any discrete events, not additional states. It always stop exactly at the specified date.

Overrides:

basicPropagate in class AbstractAnalyticalPropagator

Parameters:

date - target date for propagation

Returns:

state at specified date

getPVCoordinates

public TimeStampedPVCoordinates getPVCoordinates(AbsoluteDate date,
                                                 Frame frame)

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)

propagateOrbit

protected Orbit propagateOrbit(AbsoluteDate date)

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

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)

Description copied from class: AbstractAnalyticalPropagator

Get the mass.

Specified by:

getMass in class AbstractAnalyticalPropagator

Parameters:

date - target date for the orbit

Returns:

mass mass

getInitialState

public SpacecraftState getInitialState()

Description copied from class: AbstractPropagator

Get the propagator initial state.

Specified by:

getInitialState in interface Propagator

Overrides:

getInitialState in class AbstractPropagator

Returns:

initial state

resetIntermediateState

protected void resetIntermediateState(SpacecraftState state,
                                      boolean forward)

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

resetInitialState

public void resetInitialState(SpacecraftState state)

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