Class PositionAngleConverter

java.lang.Object
skyview.geometry.csys.PositionAngleConverter

public class PositionAngleConverter
extends java.lang.Object
This class implements an algorithm that calculates the offsets between the position angle expressed with respect to the poles in two different coordinate systems. If we transform between coordinate systems we are likely to want to express position angles with reference to the poles in the new coordinates, rather than the pole in the old coordinate system.
  • Constructor Summary

    Constructors 
    Constructor Description
    PositionAngleConverter​(CoordinateSystem input, CoordinateSystem output)  
  • Method Summary

    Modifier and Type Method Description
    double getOffsetAngle​(double[] unitIn)
    Calculate the offset between the position angles in the two coordinate systems at the point defined by the input unit vector (presumed to be in the input coordinate system).
    static void main​(java.lang.String[] args)
    Main program for testing.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
  • Constructor Details

  • Method Details

    • main

      public static void main​(java.lang.String[] args) throws java.lang.Exception
      Main program for testing. Usage: PositionAngleConverter -- Defaults to J2000 to Galactic or PositionAngleConverter output -- input defaults to J2000 or PositionAngleConverter input output
      Throws:
      java.lang.Exception
    • getOffsetAngle

      public double getOffsetAngle​(double[] unitIn)
      Calculate the offset between the position angles in the two coordinate systems at the point defined by the input unit vector (presumed to be in the input coordinate system).