Package org.orekit.propagation.events
Class LongitudeRangeCrossingDetector
- java.lang.Object
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- org.orekit.propagation.events.AbstractDetector<LongitudeRangeCrossingDetector>
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- org.orekit.propagation.events.LongitudeRangeCrossingDetector
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- All Implemented Interfaces:
EventDetector
public class LongitudeRangeCrossingDetector extends AbstractDetector<LongitudeRangeCrossingDetector>
Detector for geographic longitude crossing.This detector identifies when a spacecraft crosses a fixed longitude range with respect to a central body.
- Since:
- 12.0
- Author:
- Alberto Ferrero
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Field Summary
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Fields inherited from class org.orekit.propagation.events.AbstractDetector
DEFAULT_MAX_ITER, DEFAULT_MAXCHECK, DEFAULT_THRESHOLD
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Constructor Summary
Constructors Modifier Constructor Description LongitudeRangeCrossingDetector(double maxCheck, double threshold, OneAxisEllipsoid body, double fromLongitude, double toLongitude)
Build a detector.LongitudeRangeCrossingDetector(OneAxisEllipsoid body, double fromLongitude, double toLongitude)
Build a new detector.protected
LongitudeRangeCrossingDetector(AdaptableInterval maxCheck, double threshold, int maxIter, EventHandler handler, OneAxisEllipsoid body, double fromLongitude, double toLongitude)
Private constructor with full parameters.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected LongitudeRangeCrossingDetector
create(AdaptableInterval newMaxCheck, double newThreshold, int newMaxIter, EventHandler newHandler)
Build a new instance.double
g(SpacecraftState s)
Compute the value of the detection function.OneAxisEllipsoid
getBody()
Get the body on which the geographic zone is defined.double
getFromLongitude()
Get the fixed longitude range to be crossed (radians), lower boundary.double
getToLongitude()
Get the fixed longitude range to be crossed (radians), upper boundary.-
Methods inherited from class org.orekit.propagation.events.AbstractDetector
getHandler, getMaxCheckInterval, getMaxIterationCount, getThreshold, init, isForward, withHandler, withMaxCheck, withMaxCheck, withMaxIter, withThreshold
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Constructor Detail
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LongitudeRangeCrossingDetector
public LongitudeRangeCrossingDetector(OneAxisEllipsoid body, double fromLongitude, double toLongitude)
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 definedfromLongitude
- longitude to be crossed, lower range boundarytoLongitude
- longitude to be crossed, upper range boundary
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LongitudeRangeCrossingDetector
public LongitudeRangeCrossingDetector(double maxCheck, double threshold, OneAxisEllipsoid body, double fromLongitude, double toLongitude)
Build a detector.- Parameters:
maxCheck
- maximal checking interval (s)threshold
- convergence threshold (s)body
- body on which the longitude is definedfromLongitude
- longitude to be crossed, lower range boundarytoLongitude
- longitude to be crossed, upper range boundary
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LongitudeRangeCrossingDetector
protected LongitudeRangeCrossingDetector(AdaptableInterval maxCheck, double threshold, int maxIter, EventHandler handler, OneAxisEllipsoid body, double fromLongitude, double toLongitude)
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:
maxCheck
- maximum checking interval (s)threshold
- convergence threshold (s)maxIter
- maximum number of iterations in the event time searchhandler
- event handler to call at event occurrencesbody
- body on which the longitude is definedfromLongitude
- longitude to be crossed, lower range boundarytoLongitude
- longitude to be crossed, upper range boundary
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Method Detail
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create
protected LongitudeRangeCrossingDetector create(AdaptableInterval newMaxCheck, double newThreshold, int newMaxIter, EventHandler newHandler)
Build a new instance.- Specified by:
create
in classAbstractDetector<LongitudeRangeCrossingDetector>
- Parameters:
newMaxCheck
- maximum checking interval (s)newThreshold
- convergence threshold (s)newMaxIter
- maximum number of iterations in the event time searchnewHandler
- event handler to call at event occurrences- Returns:
- a new instance of the appropriate sub-type
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getBody
public OneAxisEllipsoid getBody()
Get the body on which the geographic zone is defined.- Returns:
- body on which the geographic zone is defined
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getFromLongitude
public double getFromLongitude()
Get the fixed longitude range to be crossed (radians), lower boundary.- Returns:
- fixed lower boundary longitude range to be crossed (radians)
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getToLongitude
public double getToLongitude()
Get the fixed longitude range to be crossed (radians), upper boundary.- Returns:
- fixed upper boundary longitude range to be crossed (radians)
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g
public double g(SpacecraftState s)
Compute the value of the detection function.The value is positive if the spacecraft longitude is inside the longitude range. The longitude value is reflected from [-PI, +PI] to [0, 2 PI] to ensure continuity.
- Specified by:
g
in interfaceEventDetector
- Specified by:
g
in classAbstractDetector<LongitudeRangeCrossingDetector>
- Parameters:
s
- the current state information: date, kinematics, attitude- Returns:
- positive if spacecraft inside the range
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