Class AngularSeparationFromSatelliteDetector

    • Constructor Detail

      • AngularSeparationFromSatelliteDetector

        public AngularSeparationFromSatelliteDetector​(PVCoordinatesProvider primaryObject,
                                                      PVCoordinatesProvider secondaryObject,
                                                      double proximityAngle)
        Build a new angular detachment detector.
        Parameters:
        primaryObject - primaryObject, at the center of the proximity zone
        secondaryObject - secondaryObject, that may come close to the primaryObject as seen from the spacecraft
        proximityAngle - proximity angle as seen from spacecraft, at which events are triggered (rad)
    • Method Detail

      • getPrimaryObject

        public PVCoordinatesProvider getPrimaryObject()
        Get the primaryObject, at the center of the proximity zone.
        Returns:
        primaryObject
      • getSecondaryObject

        public PVCoordinatesProvider getSecondaryObject()
        Get the secondaryObject.
        Returns:
        secondaryObject
      • getProximityAngle

        public double getProximityAngle()
        Get the proximity angle (rad).
        Returns:
        the proximity angle
      • g

        public double g​(SpacecraftState s)
        Compute the value of the switching function.

        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.

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