Package org.orekit.propagation.events

Class LongitudeExtremumDetector

java.lang.Object

org.orekit.propagation.events.AbstractDetector<T>

org.orekit.propagation.events.AbstractGeographicalDetector<LongitudeExtremumDetector>

org.orekit.propagation.events.LongitudeExtremumDetector

All Implemented Interfaces:

EventDetector

public class LongitudeExtremumDetector
extends AbstractGeographicalDetector<LongitudeExtremumDetector>

Detector for geographic longitude extremum.

This detector identifies when a spacecraft reaches its extremum longitudes with respect to a central body.

Since:

7.1

Author:

Luc Maisonobe

Field Summary

Fields inherited from class org.orekit.propagation.events.AbstractDetector

DEFAULT_MAX_CHECK, DEFAULT_MAX_ITER, DEFAULT_THRESHOLD

Constructor Summary

Constructors

Modifier	Constructor	Description
	LongitudeExtremumDetector(double maxCheck, double threshold, BodyShape body)	Build a detector.
	LongitudeExtremumDetector(BodyShape body)	Build a new detector.
protected	LongitudeExtremumDetector(EventDetectionSettings detectionSettings, EventHandler handler, BodyShape body)	Protected constructor with full parameters.

Method Summary

Modifier and Type	Method	Description
protected LongitudeExtremumDetector	create(EventDetectionSettings detectionSettings, EventHandler newHandler)	Build a new instance.
double	g(SpacecraftState s)	Compute the value of the detection function.
LongitudeExtremumEventFunction	getEventFunction()	Get the event function.

Methods inherited from class org.orekit.propagation.events.AbstractGeographicalDetector

getBodyShape

Methods inherited from class org.orekit.propagation.events.AbstractDetector

checkIfForward, getDetectionSettings, getHandler, init, isForward, withDetectionSettings, withHandler, withMaxCheck, withMaxCheck, withMaxIter, withThreshold

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.events.EventDetector

finish, getMaxCheckInterval, getMaxIterationCount, getThreshold, reset

Constructor Detail

LongitudeExtremumDetector

public LongitudeExtremumDetector(BodyShape body)

Build a new detector.

The new instance uses default values for maximal checking interval (AbstractDetector.DEFAULT_MAX_CHECK) and convergence threshold (AbstractDetector.DEFAULT_THRESHOLD).

Parameters:

body - body on which the longitude is defined

LongitudeExtremumDetector

public LongitudeExtremumDetector(double maxCheck,
                                 double threshold,
                                 BodyShape body)

Build a detector.

Parameters:

maxCheck - maximal checking interval (s)

threshold - convergence threshold (s)

body - body on which the longitude is defined

LongitudeExtremumDetector

protected LongitudeExtremumDetector(EventDetectionSettings detectionSettings,
                                    EventHandler handler,
                                    BodyShape body)

Protected constructor with full parameters.

This constructor is not public as users are expected to use the builder API with the various withXxx() methods to set up the instance in a readable manner without using a huge amount of parameters.

Parameters:

detectionSettings - event detection settings

handler - event handler to call at event occurrences

body - body on which the longitude is defined

Since:

13.0

Method Detail

getEventFunction

public LongitudeExtremumEventFunction getEventFunction()

Description copied from interface: EventDetector

Get the event function. It defines g both for double and Field.

Specified by:

getEventFunction in interface EventDetector

Overrides:

getEventFunction in class AbstractDetector<LongitudeExtremumDetector>

Returns:

event function

create

protected LongitudeExtremumDetector create(EventDetectionSettings detectionSettings,
                                           EventHandler newHandler)

Build a new instance.

Specified by:

create in class AbstractDetector<LongitudeExtremumDetector>

Parameters:

detectionSettings - detection settings

newHandler - event handler to call at event occurrences

Returns:

a new instance of the appropriate sub-type

g

public double g(SpacecraftState s)

Compute the value of the detection function.

The value is the spacecraft longitude time derivative.

Parameters:

s - the current state information: date, kinematics, attitude

Returns:

spacecraft longitude time derivative