fr.cnes.sirius.patrius.events
Class CentralBodyMaskCircularFOVDetector

java.lang.Object
  org.orekit.propagation.events.AbstractDetector
      fr.cnes.sirius.patrius.events.CentralBodyMaskCircularFOVDetector

All Implemented Interfaces:

Serializable, EventDetector

public class CentralBodyMaskCircularFOVDetector
extends AbstractDetector

Finder for target entry/exit events with respect to a satellite sensor FOV defined by a vector3D giving the direction in satellite frame and taking into account masking from the central body

This class handles fields of view with a circular boundary.

This class handles central body as a ellipsoid.

The default implementation behaviour is to stop propagation when the target is in the field of view outside of eclipse. This can be changed by using one of the provided constructors.

Since:

1.3

Version:

$Id: CentralBodyMaskCircularFOVDetector.java 17586 2017-05-10 13:29:16Z bignon $

Author:

chabaudp

See Also:

Propagator.addEventDetector(org.orekit.propagation.events.EventDetector), GeometricBodyShape, IEllipsoid, EclipseDetector, CircularFieldOfViewDetector, Serialized Form

Concurrency :

not thread-safe

Concurrency comment :

one attribute not thread-safe and one conditionally thread-safe

Nested Class Summary

Nested classes/interfaces inherited from interface org.orekit.propagation.events.EventDetector

EventDetector.Action

Field Summary

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

DEFAULT_MAXCHECK, DEFAULT_THRESHOLD

Fields inherited from interface org.orekit.propagation.events.EventDetector

DECREASING, INCREASING, INCREASING_DECREASING

Constructor Summary

CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody, double occultedBodyRadius, GeometricBodyShape occultingBody, boolean totalEclipseFlag, Vector3D center, double halfAperture)
Constructor with default maxcheck and default threshold, creating a circularFOVDetector and an EllipsoidEclipseDetector

CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody, double occultedBodyRadius, GeometricBodyShape occultingBody, boolean totalEclipseFlag, Vector3D center, double halfAperture, double maxCheck, double threshold)
Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody, double occultedBodyRadius, GeometricBodyShape occultingBody, boolean totalEclipseFlag, Vector3D center, double halfAperture, double maxCheck, double threshold, EventDetector.Action action)
Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody, double occultedBodyRadius, GeometricBodyShape occultingBody, boolean totalEclipseFlag, Vector3D center, double halfAperture, double maxCheck, double threshold, EventDetector.Action action, boolean remove)
Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

Method Summary

EventDetector.Action	eventOccurred(SpacecraftState s, boolean increasing, boolean forward) Handle a target in field of view outside eclipse reaching event and choose what to do next.
double	g(SpacecraftState s) The switching function is the minimum value between the eclipse detector g function and the circularFOVDetector
CircularFieldOfViewDetector	getCircularFOVDetector() Get the circular FOV detector.
EclipseDetector	getEclipseDetector() Get the eclipse detector.
boolean	shouldBeRemoved() This method is called after EventDetector.eventOccurred(org.orekit.propagation.SpacecraftState, boolean, boolean) has been triggered.

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

getMaxCheckInterval, getMaxIterationCount, getSlopeSelection, getThreshold, init, resetState

Methods inherited from class java.lang.Object

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

Constructor Detail

CentralBodyMaskCircularFOVDetector

public CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody,
                                          double occultedBodyRadius,
                                          GeometricBodyShape occultingBody,
                                          boolean totalEclipseFlag,
                                          Vector3D center,
                                          double halfAperture,
                                          double maxCheck,
                                          double threshold)

Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

The default implementation behaviour is to stop propagation when the target is visible.

Parameters:

occultedBody - the target to detect in field of view outside of eclipse

occultedBodyRadius - the radius of this target

occultingBody - the ellipsoid body shape of the central body potentially occulting the target

totalEclipseFlag - true to detect only when the target is fully visible, false to detect also when the target is partially visible

center - the sight axis direction of the field of view in satellite frame

halfAperture - the half aperture of the field of view

maxCheck - maximum check (see AbstractDetector)

threshold - threshold (see AbstractDetector)

Since:

1.3

See Also:

EclipseDetector, CircularFieldOfViewDetector

CentralBodyMaskCircularFOVDetector

public CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody,
                                          double occultedBodyRadius,
                                          GeometricBodyShape occultingBody,
                                          boolean totalEclipseFlag,
                                          Vector3D center,
                                          double halfAperture,
                                          double maxCheck,
                                          double threshold,
                                          EventDetector.Action action)

Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

Parameters:

occultedBody - the target to detect in field of view outside of eclipse

occultedBodyRadius - the radius of this target

occultingBody - the ellipsoid body shape of the central body potentially occulting the target

totalEclipseFlag - true to detect only when the target is fully visible, false to detect also when the target is partially visible

center - the sight axis direction of the field of view in satellite frame

halfAperture - the half aperture of the field of view

maxCheck - maximum check (see AbstractDetector)

threshold - threshold (see AbstractDetector)

action - action performed at circularFOV detection

Since:

1.3

See Also:

EclipseDetector, CircularFieldOfViewDetector

CentralBodyMaskCircularFOVDetector

public CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody,
                                          double occultedBodyRadius,
                                          GeometricBodyShape occultingBody,
                                          boolean totalEclipseFlag,
                                          Vector3D center,
                                          double halfAperture,
                                          double maxCheck,
                                          double threshold,
                                          EventDetector.Action action,
                                          boolean remove)

Constructor with user maxcheck and threshold creating a circularFOVDetector and an EllipsoidEclipseDetector

Parameters:

occultedBody - the target to detect in field of view outside of eclipse

occultedBodyRadius - the radius of this target

occultingBody - the ellipsoid body shape of the central body potentially occulting the target

totalEclipseFlag - true to detect only when the target is fully visible, false to detect also when the target is partially visible

center - the sight axis direction of the field of view in satellite frame

halfAperture - the half aperture of the field of view

maxCheck - maximum check (see AbstractDetector)

threshold - threshold (see AbstractDetector)

action - action performed at circularFOV detection

remove - if detector should be removed

Since:

3.1

See Also:

EclipseDetector, CircularFieldOfViewDetector

CentralBodyMaskCircularFOVDetector

public CentralBodyMaskCircularFOVDetector(PVCoordinatesProvider occultedBody,
                                          double occultedBodyRadius,
                                          GeometricBodyShape occultingBody,
                                          boolean totalEclipseFlag,
                                          Vector3D center,
                                          double halfAperture)

Constructor with default maxcheck and default threshold, creating a circularFOVDetector and an EllipsoidEclipseDetector

Parameters:

occultedBody - the target to detect in field of view outside of eclipse

occultedBodyRadius - the radius of this target

occultingBody - the ellipsoid body shape of the central body potentially occulting the target

totalEclipseFlag - true to detect only when the target is fully visible, false to detect also when the target is partially visible

center - the sight axis direction of the field of view in satellite frame

halfAperture - the half aperture of the field of view

Since:

1.3

See Also:

EclipseDetector, CircularFieldOfViewDetector

Method Detail

shouldBeRemoved

public boolean shouldBeRemoved()

This method is called after EventDetector.eventOccurred(org.orekit.propagation.SpacecraftState, boolean, boolean) has been triggered. It returns true if the current detector should be removed after first event detection. WARNING: this method can be called only once a event has been triggered. Before, the value is not available.

Specified by:

shouldBeRemoved in interface EventDetector

Specified by:

shouldBeRemoved in class AbstractDetector

Returns:

true if the current detector should be removed after first event detection

eventOccurred

public EventDetector.Action eventOccurred(SpacecraftState s,
                                          boolean increasing,
                                          boolean forward)
                                   throws OrekitException

Handle a target in field of view outside eclipse reaching event and choose what to do next.

Specified by:

eventOccurred in interface EventDetector

Specified by:

eventOccurred in class AbstractDetector

Parameters:

s - the current state of propagation

increasing - if true, the value of the switching function increases when times increases around event

forward - if true, the integration variable (time) increases during integration.

Returns:

the action performed when the expected circularFOV is reached

Throws:

OrekitException - if some specific error occurs

g

public double g(SpacecraftState s)
         throws OrekitException

The switching function is the minimum value between the eclipse detector g function and the circularFOVDetector

Specified by:

g in interface EventDetector

Specified by:

g in class AbstractDetector

Parameters:

s - the current state of propagation

Returns:

value of the switching function

Throws:

OrekitException - if some specific error occurs

See Also:

AbstractDetector.g(org.orekit.propagation.SpacecraftState)

getEclipseDetector

public EclipseDetector getEclipseDetector()

Get the eclipse detector.

Returns:

the eclipse detector taking into account ellipsoid body shape

getCircularFOVDetector

public CircularFieldOfViewDetector getCircularFOVDetector()

Get the circular FOV detector.

Returns:

The circular field of view detector