Class JSOFA.TangentPlaneCoordinate

  • Enclosing class:
    JSOFA

    public static class JSOFA.TangentPlaneCoordinate
    extends java.lang.Object
    Tangent Plane Position consisting of (xi, eta) pairs in radians.

    Notes:

    1. The tangent plane projection is also called the "gnomonic projection" and the "central projection".
    2. The eta axis points due north in the adopted coordinate system. If the spherical coordinates are observed (RA,Dec), the tangent plane coordinates (xi,eta) are conventionally called the "standard coordinates". For right-handed spherical coordinates, (xi,eta) are also right-handed. The units of (xi,eta) are, effectively, radians at the tangent point.
    Since:
    JSOFA release 20180130
    Author:
    Paul Harrison (paul.harrison@manchester.ac.uk)
    • Field Summary

      Fields 
      Modifier and Type Field Description
      double eta  
      int status
      status.
      double xi  
    • Constructor Summary

      Constructors 
      Constructor Description
      TangentPlaneCoordinate​(double xi, double eta, int j)  
    • Method Summary

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • xi

        public double xi
      • eta

        public double eta
      • status

        public int status
        status. 0 = OK 1 = star too far from axis 2 = antistar on tangent plane 3 = antistar too far from axis
    • Constructor Detail

      • TangentPlaneCoordinate

        public TangentPlaneCoordinate​(double xi,
                                      double eta,
                                      int j)