Class NadirPointing

  • All Implemented Interfaces:
    Serializable, AttitudeProvider

    public class NadirPointing
    extends GroundPointing
    This class handles nadir pointing attitude provider.

    This class represents the attitude provider where the satellite z axis is pointing to the vertical of the ground point under satellite.

    The object NadirPointing is guaranteed to be immutable.

    Author:
    Véronique Pommier-Maurussane
    See Also:
    GroundPointing, Serialized Form
    • Constructor Detail

      • NadirPointing

        public NadirPointing​(Frame inertialFrame,
                             BodyShape shape)
        Creates new instance.
        Parameters:
        inertialFrame - frame in which orbital velocities are computed
        shape - Body shape
        Since:
        7.1
    • Method Detail

      • getTargetPV

        public TimeStampedPVCoordinates getTargetPV​(PVCoordinatesProvider pvProv,
                                                    AbsoluteDate date,
                                                    Frame frame)
        Compute the target point position/velocity in specified frame.

        This method is public only to allow users to subclass this abstract class from other packages. It is not intended to be used directly.

        Specified by:
        getTargetPV in class GroundPointing
        Parameters:
        pvProv - provider for PV coordinates
        date - date at which target point is requested
        frame - frame in which observed ground point should be provided
        Returns:
        observed ground point position (element 0) and velocity (at index 1) in specified frame
      • getTargetPV

        public <T extends org.hipparchus.RealFieldElement<T>> TimeStampedFieldPVCoordinates<T> getTargetPV​(FieldPVCoordinatesProvider<T> pvProv,
                                                                                                           FieldAbsoluteDate<T> date,
                                                                                                           Frame frame)
        Compute the target point position/velocity in specified frame.
        Specified by:
        getTargetPV in class GroundPointing
        Type Parameters:
        T - type of the fiels elements
        Parameters:
        pvProv - provider for PV coordinates
        date - date at which target point is requested
        frame - frame in which observed ground point should be provided
        Returns:
        observed ground point position (element 0) and velocity (at index 1) in specified frame