Package org.orekit.propagation.events

Class LatitudeRangeCrossingDetector

java.lang.Object

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

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

org.orekit.propagation.events.LatitudeRangeCrossingDetector

All Implemented Interfaces:

EventDetector

public class LatitudeRangeCrossingDetector
extends AbstractGeographicalDetector<LatitudeRangeCrossingDetector>

Detector for geographic latitude crossing.

This detector identifies when a spacecraft crosses a fixed latitude range with respect to a central body.

Since:

12.0

Author:

Alberto Ferrero

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
	LatitudeRangeCrossingDetector(double maxCheck, double threshold, BodyShape body, double fromLatitude, double toLatitude)	Build a detector.
	LatitudeRangeCrossingDetector(BodyShape body, double fromLatitude, double toLatitude)	Build a new detector.
protected	LatitudeRangeCrossingDetector(EventDetectionSettings detectionSettings, EventHandler handler, BodyShape body, double fromLatitude, double toLatitude)	Private constructor with full parameters.

Method Summary

Modifier and Type	Method	Description
protected LatitudeRangeCrossingDetector	create(EventDetectionSettings detectionSettings, EventHandler newHandler)	Build a new instance.
double	g(SpacecraftState s)	Compute the value of the detection function.
double	getFromLatitude()	Get the fixed latitude range to be crossed (radians), lower boundary.
double	getToLatitude()	Get the fixed latitude range to be crossed (radians), upper boundary.

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

getBodyShape

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

checkIfForward, getDetectionSettings, getEventFunction, 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 Details

LatitudeRangeCrossingDetector

public LatitudeRangeCrossingDetector(BodyShape body,
 double fromLatitude,
 double toLatitude)

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 latitude is defined

fromLatitude - latitude to be crossed, lower range boundary

toLatitude - latitude to be crossed, upper range boundary

LatitudeRangeCrossingDetector

public LatitudeRangeCrossingDetector(double maxCheck,
 double threshold,
 BodyShape body,
 double fromLatitude,
 double toLatitude)

Build a detector.

Parameters:

maxCheck - maximal checking interval (s)

threshold - convergence threshold (s)

body - body on which the latitude is defined

fromLatitude - latitude to be crossed, lower range boundary

toLatitude - latitude to be crossed, upper range boundary

LatitudeRangeCrossingDetector

protected LatitudeRangeCrossingDetector(EventDetectionSettings detectionSettings,
 EventHandler handler,
 BodyShape body,
 double fromLatitude,
 double toLatitude)

Private constructor with full parameters.

This constructor is private 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 latitude is defined

fromLatitude - latitude to be crossed, lower range boundary

toLatitude - latitude to be crossed, upper range boundary

Since:

13.0

Method Details

create

protected LatitudeRangeCrossingDetector create(EventDetectionSettings detectionSettings,
 EventHandler newHandler)

Build a new instance.

Specified by:

create in class AbstractDetector<LatitudeRangeCrossingDetector>

Parameters:

detectionSettings - detection settings

newHandler - event handler to call at event occurrences

Returns:

a new instance of the appropriate sub-type

getFromLatitude

public double getFromLatitude()

Get the fixed latitude range to be crossed (radians), lower boundary.

Returns:

fixed lower boundary latitude range to be crossed (radians)

getToLatitude

public double getToLatitude()

Get the fixed latitude range to be crossed (radians), upper boundary.

Returns:

fixed lower boundary latitude range to be crossed (radians)

g

public double g(SpacecraftState s)

Compute the value of the detection function.

The value is positive if the spacecraft latitude is inside the latitude range. It is positive if the spacecraft is northward to lower boundary range and southward to upper boundary range, with respect to the fixed latitude range.

Parameters:

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

Returns:

positive if spacecraft inside the range