Package org.orekit.propagation.events

Class LongitudeExtremumDetector

java.lang.Object

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

org.orekit.propagation.events.LongitudeExtremumDetector

All Implemented Interfaces:

EventDetector

public class LongitudeExtremumDetector
extends AbstractDetector<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_ITER, DEFAULT_MAXCHECK, DEFAULT_THRESHOLD

Constructor Summary

Constructors

Modifier	Constructor	Description
	LongitudeExtremumDetector(double maxCheck, double threshold, OneAxisEllipsoid body)	Build a detector.
	LongitudeExtremumDetector(OneAxisEllipsoid body)	Build a new detector.
protected	LongitudeExtremumDetector(AdaptableInterval maxCheck, double threshold, int maxIter, EventHandler handler, OneAxisEllipsoid body)	Protected constructor with full parameters.

Method Summary

Modifier and Type	Method	Description
protected LongitudeExtremumDetector	create(AdaptableInterval newMaxCheck, double newThreshold, int newMaxIter, EventHandler newHandler)	Build a new instance.
double	g(SpacecraftState s)	Compute the value of the detection function.
BodyShape	getBody()	Get the body on which the geographic zone is defined.

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

getHandler, getMaxCheckInterval, getMaxIterationCount, getThreshold, init, isForward, withHandler, withMaxCheck, withMaxCheck, withMaxIter, withThreshold

Methods inherited from class java.lang.Object

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

Constructor Detail

LongitudeExtremumDetector

public LongitudeExtremumDetector(OneAxisEllipsoid body)

Build a new detector.

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

Parameters:

body - body on which the longitude is defined

LongitudeExtremumDetector

public LongitudeExtremumDetector(double maxCheck,
                                 double threshold,
                                 OneAxisEllipsoid 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(AdaptableInterval maxCheck,
                                    double threshold,
                                    int maxIter,
                                    EventHandler handler,
                                    OneAxisEllipsoid 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:

maxCheck - maximum checking interval

threshold - convergence threshold (s)

maxIter - maximum number of iterations in the event time search

handler - event handler to call at event occurrences

body - body on which the longitude is defined

Method Detail

create

protected LongitudeExtremumDetector create(AdaptableInterval newMaxCheck,
                                           double newThreshold,
                                           int newMaxIter,
                                           EventHandler newHandler)

Build a new instance.

Specified by:

create in class AbstractDetector<LongitudeExtremumDetector>

Parameters:

newMaxCheck - maximum checking interval (s)

newThreshold - convergence threshold (s)

newMaxIter - maximum number of iterations in the event time search

newHandler - event handler to call at event occurrences

Returns:

a new instance of the appropriate sub-type

getBody

public BodyShape getBody()

Get the body on which the geographic zone is defined.

Returns:

body on which the geographic zone is defined

g

public double g(SpacecraftState s)

Compute the value of the detection function.

The value is the spacecraft longitude time derivative.

Specified by:

g in interface EventDetector

Specified by:

g in class AbstractDetector<LongitudeExtremumDetector>

Parameters:

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

Returns:

spacecraft longitude time derivative