 specific arithmetic implementation.

      %
      % Define an ellipsoid
      %
      a = sqrt(2.);
      b = 2.*sqrt(2.);
      c = sqrt(2.);

      %
      % Locate a viewpoint exterior to the ellipsoid.
      %
      viewpt = [ 2., 0.,  0. ]';

      %
      % Calculate the limb ellipse as seen by from the viewpoint.
      %
      limb = <b>cspice_edlimb</b>( a, b, c, viewpt );

      %
      % Output the structure components.
      %
      smin   = limb.semiMinor
      smaj   = limb.semiMajor
      ce