Class FieldOfViewDetector

    • Constructor Detail

      • FieldOfViewDetector

        public FieldOfViewDetector​(PVCoordinatesProvider pvTarget,
                                   FieldOfView fov)
        Build a new instance.

        The maximal interval between distance to FOV boundary checks should be smaller than the half duration of the minimal pass to handle, otherwise some short passes could be missed.

        Parameters:
        pvTarget - Position/velocity provider of the considered target
        fov - Field Of View
    • Method Detail

      • create

        protected FieldOfViewDetector create​(double newMaxCheck,
                                             double newThreshold,
                                             int newMaxIter,
                                             EventHandler<? super FieldOfViewDetector> newHandler)
        Build a new instance.
        Specified by:
        create in class AbstractDetector<FieldOfViewDetector>
        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
      • getPVTarget

        public PVCoordinatesProvider getPVTarget()
        Get the position/velocity provider of the target .
        Returns:
        the position/velocity provider of the target
      • getFieldOfView

        public FieldOfView getFieldOfView()
        Get the Field Of View.
        Returns:
        Field Of View
      • g

        public double g​(SpacecraftState s)
        Compute the value of the switching function. This function must be continuous (at least in its roots neighborhood), as the integrator will need to find its roots to locate the events.

        The g function value is the angular offset between the target and the Field Of View boundary. It is negative if the target is visible within the Field Of View and positive if it is outside of the Field Of View, including the margin.

        As per the previous definition, when the target enters the Field Of View, a decreasing event is generated, and when the target leaves the Field Of View, an increasing event is generated.

        Specified by:
        g in interface EventDetector
        Specified by:
        g in class AbstractDetector<FieldOfViewDetector>
        Parameters:
        s - the current state information: date, kinematics, attitude
        Returns:
        value of the switching function