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!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
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!

      SUBROUTINE SPA2SPSV 2,3
#if defined (DOC)
*
***s/r SPA2SPSV   -  SV enhancement for SPA2SP
*
*Author  : Mark Buehner *ARMA/AES  August, 2002
*
* NOTE: Called after SPGD
*
*Arguments
*    -NONE-
#endif
      IMPLICIT NONE
*implicits
#include "comdim.cdk"
#include "comgd0.cdk"
#include "comgd1.cdk"
#include "comsv.cdk"
*
      INTEGER JK1,jsv,JJ,JI
      real*8 zfact1,zfact2
c
c MODE 0: DO NOTHING
c
      IF(NSVMODE.eq.0) then
        RETURN
      ENDIF
c
c Set existing component to zero
c
      IF(NSVMODE.eq.1) call transfer('ZGD0')
      call transfer('ZGD1')
c
c Construct SV component
c
      DO JSV=1,NSV
        DO JI=1,NI
          DO JK1 = 1,NKGDIM
            DO JJ=1,NJ
              GD1(JI,JK1,JJ)=GD1(JI,JK1,JJ)+SVGD(JI,JK1,JJ,JSV)*SVCONTR(JSV)
            ENDDO
          ENDDO
        ENDDO
      ENDDO
c
c Add SV component to homogeneous-isotropic component
c
      ZFACT1=SCALEHI
      IF(ZFACT1.gt.0.0) THEN
        ZFACT1=sqrt(ZFACT1)
      ELSE
        ZFACT1=0.0
      ENDIF
      ZFACT2=SCALESV
      IF(ZFACT2.gt.0.0) THEN
        ZFACT2=sqrt(ZFACT2)
      ELSE
        ZFACT2=0.0
      ENDIF
      DO JI=1,NI
        DO JK1 = 1,NKGDIM
          DO JJ=1,NJ
            GD(JI,JK1,JJ)=ZFACT1*GD(JI,JK1,JJ)+ZFACT2*GD1(JI,JK1,JJ)
          ENDDO
        ENDDO
      ENDDO
c
      CALL TRANSFER('ZGD1')
c
      RETURN
      END