public class AngularSeparationFromSatelliteDetector extends AbstractDetector<AngularSeparationFromSatelliteDetector>
The main use case for this detector is when the primary object is in fact a ground
station, modeled as a TopocentricFrame and when the secondary
is the Sun, for computing
optical reflections.
The default handler behavior is to stop
propagation when objects enter the proximity zone. This can be changed by calling
AbstractDetector.withHandler(EventHandler) after construction.
Propagator.addEventDetector(EventDetector)DEFAULT_MAX_ITER, DEFAULT_MAXCHECK, DEFAULT_THRESHOLD| Constructor and Description |
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AngularSeparationFromSatelliteDetector(PVCoordinatesProvider primaryObject,
PVCoordinatesProvider secondaryObject,
double proximityAngle)
Build a new angular detachment detector.
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| Modifier and Type | Method and Description |
|---|---|
protected AngularSeparationFromSatelliteDetector |
create(double newMaxCheck,
double newThreshold,
int newMaxIter,
EventHandler<? super AngularSeparationFromSatelliteDetector> newHandler)
Build a new instance.
|
double |
g(SpacecraftState s)
Compute the value of the switching function.
|
PVCoordinatesProvider |
getPrimaryObject()
Get the primaryObject, at the center of the proximity zone.
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double |
getProximityAngle()
Get the proximity angle (rad).
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PVCoordinatesProvider |
getSecondaryObject()
Get the secondaryObject.
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eventOccurred, getHandler, getMaxCheckInterval, getMaxIterationCount, getThreshold, init, isForward, resetState, withHandler, withMaxCheck, withMaxIter, withThresholdpublic AngularSeparationFromSatelliteDetector(PVCoordinatesProvider primaryObject, PVCoordinatesProvider secondaryObject, double proximityAngle)
primaryObject - primaryObject, at the center of the proximity zonesecondaryObject - secondaryObject, that may come close to
the primaryObject as seen from the spacecraftproximityAngle - proximity angle as seen from spacecraft, at which events are triggered (rad)protected AngularSeparationFromSatelliteDetector create(double newMaxCheck, double newThreshold, int newMaxIter, EventHandler<? super AngularSeparationFromSatelliteDetector> newHandler)
create in class AbstractDetector<AngularSeparationFromSatelliteDetector>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 occurrencespublic PVCoordinatesProvider getPrimaryObject()
public PVCoordinatesProvider getSecondaryObject()
public double getProximityAngle()
public double g(SpacecraftState s)
This function measures the angular separation between primary and secondary objects as seen from the spacecraft minus the proximity angle. It therefore triggers decreasing events when the secondary object enters the proximity zone and increasing events when it leaves the proximity zone.
No shadowing effect is taken into account, so this method is computed and
may trigger events even when the secondary object is behind the primary.
If such effects must be taken into account the
detector must be associated with a predicate
filter where the predicate function is based on eclipse conditions.
g in interface EventDetectorg in class AbstractDetector<AngularSeparationFromSatelliteDetector>s - the current state information: date, kinematics, attitudeCopyright © 2002-2022 CS GROUP. All rights reserved.