Package org.orekit.attitudes

Class TargetPointing

java.lang.Object
org.orekit.attitudes.GroundPointing
org.orekit.attitudes.TargetPointing
All Implemented Interfaces:
AttitudeProvider, AttitudeRotationModel, EventDetectorsProvider, ParameterDriversProvider
public class TargetPointing extends GroundPointing
This class handles target pointing attitude provider.

This class represents the attitude provider where the satellite z axis is pointing to a ground point target.

The target position is defined in a body frame specified by the user. It is important to make sure this frame is consistent.

The object TargetPointing is guaranteed to be immutable.

Author:
Véronique Pommier-Maurussane
See Also:

  • Constructor Details

    • TargetPointing

      public TargetPointing(Frame inertialFrame, Frame bodyFrame, Vector3D target)
      Creates a new instance from body frame and target expressed in Cartesian coordinates.
      Parameters:
      inertialFrame - frame in which orbital velocities are computed
      bodyFrame - body frame.
      target - target position in body frame
      Since:
      7.1

    • TargetPointing

      public TargetPointing(Frame inertialFrame, GeodeticPoint targetGeo, BodyShape shape)
      Creates a new instance from body shape and target expressed in geodetic coordinates.
      Parameters:
      inertialFrame - frame in which orbital velocities are computed
      targetGeo - target defined as a geodetic point in body shape frame
      shape - body shape
      Since:
      7.1

  • Method Details

    • getTargetPV

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

    • getTargetPosition

      protected Vector3D getTargetPosition(PVCoordinatesProvider pvProv, AbsoluteDate date, Frame frame)
      Compute the target point position in specified frame.
      Overrides:
      getTargetPosition 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 in specified frame

    • getTargetPV

      public <T extends CalculusFieldElement<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 field 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

    • getTargetPosition

      protected <T extends CalculusFieldElement<T>> FieldVector3D<T> getTargetPosition(FieldPVCoordinatesProvider<T> pvProv, FieldAbsoluteDate<T> date, Frame frame)
      Compute the target point position in specified frame.
      Overrides:
      getTargetPosition in class GroundPointing
      Type Parameters:
      T - type of the field 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 in specified frame