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!
C
C  X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
C

      subroutine cv2gd 2,11
*
***s/r cv2gd  - Go from LA control variables to grid-point fields
*
*
*Author  : Luc Fillion - CGD/NCAR - Jul 99
*Revision: Luc Fillion - CGD/NCAR - Mar 2003.
*Revision: Luc Fillion - ARMA/MSC - 8 Dec 2005. - Include option of Vort, Div as control variable.
*
*     -------------------
**    Purpose: Used for LA-XD-Var analysis
*
*Arguments
*
      implicit none
!
#include "taglam4d.cdk"
#include "comdim.cdk"
#include "comlun.cdk"
#include "comcva.cdk"
#include "comgd0.cdk"
#include "compdg.cdk"
#include "comsim.cdk"
#include "comin.cdk"
#include "comsp.cdk"
!
      logical lltest_1tstp
      integer ji,jj,jk,nip1,njp1,jla
      integer ilen,ierr
      integer idum1,idum2,idum3,idum4
      real*8 zmin,zmax
!
      real*8 zu(0:ni+1,nflev,0:nj+1)
      real*8 zv(0:ni+1,nflev,0:nj+1)
      real*8 zgdpsi(ni,nflev,nj)
      real*8 zgdchi(ni,nflev,nj)
      real*8 zvort(ni,nflev,nj)
      real*8 zdiv(ni,nflev,nj)
      real*8 z3d(ni,nflev,nj)
      real*8 zsp(nla,2,nflev)
*
**
      lltest_1tstp = .false.
!
! Undo preconditioning
!
      if(nanalvar.eq.4) then
         call splat2sp
         call sqrtc2   ! sp  --> sp
      else
        call sqrtc   ! sp  --> sp
      endif
      call spgd    ! sp  --> gd0
      call denorm  ! gd0 --> gd0
!
      write(nulout,*) 'cv2gd: lcva_helm = ',lcva_helm
      if(lcva_helm) then
        do jk=1,nflev
        do jj=1,nj
        do ji=1,ni
          zgdpsi(ji,jk,jj)=ut0(ji,jk,jj)
          zgdchi(ji,jk,jj)=vt0(ji,jk,jj)
        enddo
        enddo
        enddo
      else
        do jk=1,nflev
        do jj=1,nj
        do ji=1,ni
          zvort(ji,jk,jj)=ut0(ji,jk,jj)
          zdiv(ji,jk,jj)=vt0(ji,jk,jj)
        enddo
        enddo
        enddo
        call zd2pc_euclid(zgdpsi,zgdchi,zvort,zdiv)
      endif
!
      if(ldobal) then
        if(nanalvar.eq.4) then
          call lbal2(zgdpsi,zgdchi,zvort,zdiv,lcva_helm)
        else
          call lbal(zgdpsi,zgdchi,zvort,zdiv,lcva_helm)
        endif
      endif
!
      call pc2UVg_c(zu,zv,zgdpsi,zgdchi)
!
      do jk=1,nflev
      do jj=0,nj+1
      do ji=0,ni+1
        ut0(ji,jk,jj)=zu(ji,jk,jj)
        vt0(ji,jk,jj)=zv(ji,jk,jj)
      enddo
      enddo
      enddo
!
      if(lltest_1tstp) then
        nsim3d=nsim3d-1
        call putdx2('I')
        call getdx('I')
        nsim3d=nsim3d+1
      endif
!
!      call uvbiais('cv2gd       ')  ! check U and V biais
!
!      write(nulout,*) 'cv2gd: END'
!
      return
      end