org.orekit.propagation.events

Class LatitudeExtremumDetector

java.lang.Object

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

org.orekit.propagation.events.LatitudeExtremumDetector

All Implemented Interfaces:

Serializable, EventDetector

public class LatitudeExtremumDetector
extends AbstractDetector<LatitudeExtremumDetector>

Detector for geographic latitude extremum.

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

Since:

7.1

Author:

Luc Maisonobe

See Also:

Serialized Form

Field Summary

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

DEFAULT_MAX_ITER, DEFAULT_MAXCHECK, DEFAULT_THRESHOLD

Constructor Summary

Constructors

Constructor and Description
LatitudeExtremumDetector(double maxCheck, double threshold, OneAxisEllipsoid body) Build a detector.
LatitudeExtremumDetector(OneAxisEllipsoid body) Build a new detector.

Method Summary

Modifier and Type	Method and Description
protected LatitudeExtremumDetector	create(double newMaxCheck, double newThreshold, int newMaxIter, EventHandler<? super LatitudeExtremumDetector> 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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

LatitudeExtremumDetector

public LatitudeExtremumDetector(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 latitude is defined

LatitudeExtremumDetector

public LatitudeExtremumDetector(double maxCheck,
                                double threshold,
                                OneAxisEllipsoid body)

Build a detector.

Parameters:

maxCheck - maximal checking interval (s)

threshold - convergence threshold (s)

body - body on which the latitude is defined

Method Detail

create

protected LatitudeExtremumDetector create(double newMaxCheck,
                                          double newThreshold,
                                          int newMaxIter,
                                          EventHandler<? super LatitudeExtremumDetector> newHandler)

Build a new instance.

Specified by:

create in class AbstractDetector<LatitudeExtremumDetector>

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)
         throws OrekitException

Compute the value of the detection function.

The value is the spacecraft latitude time derivative.

Specified by:

g in interface EventDetector

Specified by:

g in class AbstractDetector<LatitudeExtremumDetector>

Parameters:

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

Returns:

spacecraft latitude time derivative

Throws:

OrekitException - if some specific error occurs