!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
!version 3 or (at your option) any later version that should be found at:
!http://collaboration.cmc.ec.gc.ca/science/rpn.comm/license.html
!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!See the above mentioned License/Disclaimer for more details.
!You should have received a copy of the License/Disclaimer along with this software;
!if not, you can write to: EC-RPN COMM Group, 2121 TransCanada, suite 500, Dorval (Quebec),
!CANADA, H9P 1J3; or send e-mail to service.rpn@ec.gc.ca
!-------------------------------------- LICENCE END --------------------------------------
!

      subroutine preobs 2,2
#if defined (DOC)
*
***s/r LIRREG
*
*
*Author  : Luc Fillion - arma - 7 oct 98
*Revision:
*
**    Purpose: Prepare first-guess intermediate fields
*
*
*
*
*
*Arguments
*
#endif
      IMPLICIT NONE
*implicits
*
c
c*1   Geopotential from Temperature
c     -----------------------------
c
 100  continue
      call tt2phi
c
c*2   lnq to (T-Td)
c     --------
c
 200  continue
      call mhuaesv
c
c
      RETURN
      END