!-------------------------------------- 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
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!
!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.
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!
*
***S/R fcartauv - compute the components of the winds in the rotated system of
*                 coordinates from the winds in the rotated cartesian space
!                 Fast version of cartauv used by Variational analysis.
*

      subroutine fcartauv(pu,pv,pcart,pcoslonob,psinlonob,prsinlatob,knk) 1
!
      IMPLICIT NONE
      integer knk
      real*8 pcart(3,knk),pu(knk),pv(knk)
      real*8 pcoslonob,psinlonob,prsinlatob
!
!author Luc Fillion - ARMA/MSC - 7 Feb 05:
!              from ez_CARTAUV written by Michel roch - april 90
!
!Revision: L. Fillion - ARMA/MSC - 25 Feb 05: Fast version from cartauv.
!
!arguments
      integer jk
      real*8  zfac1,zfac2
#include "taglam4d.cdk"
!
!!
      zfac1=-prsinlatob*pcoslonob
      zfac2=-prsinlatob*psinlonob
!
      do jk=1,knk
        pu(jk) = -psinlonob*pcart(1,jk) + pcoslonob*pcart(2,jk)
        pv(jk) = zfac1*pcart(1,jk) + zfac2*pcart(2,jk)
      enddo
!
      RETURN
      END