C @(#)cathed.for	17.1.1.1 (ES0-DMD) 01/25/02 17:17:16
C===========================================================================
C Copyright (C) 1995 European Southern Observatory (ESO)
C
C This program is free software; you can redistribute it and/or 
C modify it under the terms of the GNU General Public License as 
C published by the Free Software Foundation; either version 2 of 
C the License, or (at your option) any later version.
C
C This program is distributed in the hope that it will be useful,
C but WITHOUT ANY WARRANTY; without even the implied warranty of
C MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
C GNU General Public License for more details.
C
C You should have received a copy of the GNU General Public 
C License along with this program; if not, write to the Free 
C Software Foundation, Inc., 675 Massachusetss Ave, Cambridge, 
C MA 02139, USA.
C
C Corresponding concerning ESO-MIDAS should be addressed as follows:
C	Internet e-mail: midas@eso.org
C	Postal address: European Southern Observatory
C			Data Management Division 
C			Karl-Schwarzschild-Strasse 2
C			D 85748 Garching bei Muenchen 
C			GERMANY
C===========================================================================
C
C  @(#)cathed.for	17.1.1.1  (ESO-IPG)  01/25/02  17:17:16
      SUBROUTINE CATHED(CATNO,HED)
c
c	Copyright (C) Andrew T. Young, 1990
C 
C  ADD CAT.LETTERS IF NEEDED.      10 MAR.'85 
C 
      IMPLICIT NONE
C 
      CHARACTER*20 CATNO,DUM, HED*3 
C 
      IF(CATNO(:2).NE.HED)THEN
       DUM=HED//CATNO 
       CATNO=DUM
      END IF
      RETURN
      END