def background_mesh_ma(self):
        """
        The background 2D (masked) array mesh prior to any
        interpolation.  The array is masked only if meshes were
        excluded.
        """

        if len(self._bkg1d) == self.nboxes:
            return self.background_mesh
        else:
            return self._make_2d_array(self._bkg1d)
def background_mesh_ma ( self ) : if len ( self . _bkg1d ) == self . nboxes : return self . background_mesh else : return self . _make_2d_array ( self . _bkg1d )
The background 2D (masked) array mesh prior to any
        interpolation.  The array is masked only if meshes were
        excluded.