!-------------------------------------- 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 SUWINLATBIN(ZWINDOW,JLATBIN) 4
#if defined (DOC)
*
***s/r SUWINLATBIN  - Set-up window used for combining analysis increments
*                     from multiple latitude bands as specified by namelist
*                     variable NLATBIN - currently only 1 and 3 bands supported
*
*Author  : M. Buehner 2007
*Revision:
*
*    -------------------
**    Purpose:
*     .
*Arguments
#endif
      IMPLICIT NONE
#include "pardim.cdk"
#include "comdim.cdk"
#include "comcva.cdk"

      REAL*8 ZWINDOW(NJ)
      INTEGER JLATBIN,JLAT

      IF(NLATBIN.eq.1) THEN
        ZWINDOW(:)=1.0d0
      ELSE
        IF(JLATBIN.eq.1) THEN
          DO JLAT=1,(NLATMIN1-1)
            ZWINDOW(JLAT)=1.0d0
          ENDDO
          DO JLAT=NLATMIN1,NLATMAX1
            ZWINDOW(JLAT)=sqrt(dble(NLATMAX1-JLAT+1)/dble(NLATMAX1-NLATMIN1+2))
          ENDDO
        ELSEIF(JLATBIN.eq.2) THEN
          DO JLAT=(NLATMAX1+1),(NLATMIN2-1)
            ZWINDOW(JLAT)=1.0d0
          ENDDO
          DO JLAT=NLATMIN1,NLATMAX1
            ZWINDOW(JLAT)=sqrt(dble(JLAT-NLATMIN1+1)/dble(NLATMAX1-NLATMIN1+2))
          ENDDO
          DO JLAT=NLATMIN2,NLATMAX2
            ZWINDOW(JLAT)=sqrt(dble(NLATMAX2-JLAT+1)/dble(NLATMAX2-NLATMIN2+2))
          ENDDO
        ELSEIF(JLATBIN.eq.3) THEN
          DO JLAT=(NLATMAX2+1),NJ
            ZWINDOW(JLAT)=1.0d0
          ENDDO
          DO JLAT=NLATMIN2,NLATMAX2
            ZWINDOW(JLAT)=sqrt(dble(JLAT-NLATMIN2+1)/dble(NLATMAX2-NLATMIN2+2))
          ENDDO
        ENDIF
      ENDIF

      RETURN
      END