c     IF (ok_hf) THEN
c
        zout = dtime * REAL(NINT(86400./dtime*ecrit_hf))
        zsto = zout
        zsto1 = dtime
        PRINT*, 'La frequence de sortie instant. est de ', ecrit_hf
c
cIM cf LF
         idayref = day_ref
         CALL ymds2ju(annee_ref, 1, idayref, 0.0, zjulian)

cccIM    CALL ymds2ju(anne_ini, 1, 1, 0.0, zjulian)
c        CALL ymds2ju(annee_ref, 1, 1, 0.0, zjulian)
c        zjulian = zjulian + day_ini
cIM cf LF

c
         CALL gr_fi_ecrit(1,klon,iim,jjmp1,rlon,zx_lon)
         DO i = 1, iim
            zx_lon(i,1) = rlon(i+1)
            zx_lon(i,jjmp1) = rlon(i+1)
         ENDDO

         CALL gr_fi_ecrit(1,klon,iim,jjmp1,rlat,zx_lat)

cccIM      CALL histbeg("histhf", iim,zx_lon, jjmp1,zx_lat,
         CALL histbeg("histhf3d", iim,zx_lon(:,1), jjmp1,zx_lat(1,:),
     .                 1,iim,1,jjmp1, itau_phy, zjulian, dtime, 
     .                 nhori, nid_hf3d)

         CALL histvert(nid_hf3d, "presnivs", "Vertical levels", "mb",
     .                 klev, presnivs, nvert)
c

c     IF(lev_histhf.GE.4) THEN
c
c Champs 3D:
c
         CALL histdef(nid_hf3d, "temp", "Air temperature", "K",
     .                iim,jjmp1,nhori, klev,1,klev,nvert, 32,
     .                "ave(X)", zsto,zout)
c
         CALL histdef(nid_hf3d, "ovap", "Specific humidity", "kg/kg",
     .                iim,jjmp1,nhori, klev,1,klev,nvert, 32,
     .                "ave(X)", zsto,zout)
c
         CALL histdef(nid_hf3d, "vitu", "Zonal wind", "m/s",
     .                iim,jjmp1,nhori, klev,1,klev,nvert, 32,
     .                "ave(X)", zsto,zout)
c
         CALL histdef(nid_hf3d, "vitv", "Meridional wind", "m/s",
     .                iim,jjmp1,nhori, klev,1,klev,nvert, 32,
     .                "ave(X)", zsto,zout)
c
c     ENDIF
c
         CALL histend(nid_hf3d)
c
c     endif ! ok_hf