Class Besselian

java.lang.Object
skyview.geometry.CoordinateSystem
skyview.geometry.csys.Besselian
All Implemented Interfaces:
Serializable, Component

public class Besselian extends CoordinateSystem implements Component
This class implements Besselian coordinate systems. These systems are not simple rotations from the reference coordinate frame. These coordinate systems are implemented such that the rotation matrix is appropriate for J2000 coordinates but the rectify and derectify function perform transformation from/to Besselian coordinates. The transformations do not use any proper motion or distance information supplied by the user. The methods in this class are based on P. Wallaces SLA library substantially modified for use within Java and SkyView.
See Also:
  • Constructor Details

    • Besselian

      public Besselian(double epoch)
      Get a CoordinateSystem of a given epoch.
      Parameters:
      epoch - The epoch as a calendar year (possibly fractional).
  • Method Details

    • isRotation

      public boolean isRotation()
      This coordinate system is not just a rotation away from the reference frame.
    • getName

      public String getName()
      Description copied from interface: Component
      Get the name of this component.
      Specified by:
      getName in interface Component
    • getDescription

      public String getDescription()
      Description copied from interface: Component
      Get the description of this component.
      Specified by:
      getDescription in interface Component
    • getRotater

      public Rotater getRotater()
      Description copied from class: CoordinateSystem
      Get the rotation associated with the projection.
      Specified by:
      getRotater in class CoordinateSystem
    • getSphereDistorter

      public SphereDistorter getSphereDistorter()
      Description copied from class: CoordinateSystem
      Get the distortion associated with the projection. By default there is no distortion, but subclasses, notably BesselianProjection, can override this.
      Overrides:
      getSphereDistorter in class CoordinateSystem