Class JSOFA.TangentPlaneCoordinate

java.lang.Object
org.jastronomy.jsofa.JSOFA.TangentPlaneCoordinate
Enclosing class:
JSOFA

public static class JSOFA.TangentPlaneCoordinate extends 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 Details

    • 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 Details

    • TangentPlaneCoordinate

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