      subroutine bilinb(cob,inb,jnb,im,jm,ime,jme,ww,wfbc)
!     **********************************************
!     *                                            *
!     *  routine for bilinear interpolation        *
!     *  of avn parameters into hibu bndry pts     *
!     *                                            *
!     **********************************************
      dimension cob(3,im,jm),inb(4,im,jm),jnb(4,im,jm)
      dimension ww(ime,jme),wfbc(im,jm)
!
              do j=1,jm
          do i=1,im

!
      i00=inb(1,i,j)
      i10=inb(2,i,j)
      i01=inb(3,i,j)
      i11=inb(4,i,j)
!
      j00=jnb(1,i,j)
      j10=jnb(2,i,j)
      j01=jnb(3,i,j)
      j11=jnb(4,i,j)
!
      p=cob(2,i,j)
      q=cob(3,i,j)
      pq=cob(1,i,j)
!
      wfbc(i,j)=ww(i00,j00)+p*(ww(i10,j10)-ww(i00,j00))
     &                     +q*(ww(i01,j01)-ww(i00,j00))
     &   +pq*(ww(i00,j00)-ww(i10,j10)-ww(i01,j01)+ww(i11,j11))
!
	if (i .eq. 1 .and. j .eq. 1) then
C	write(6,*) 'cob ', (cob(l,i,j),l=1,3)
C	write(6,*) 'inb ', (inb(l,i,j),l=1,4)
C	write(6,*) 'jnb ', (jnb(l,i,j),l=1,4)
	if (abs(wfbc(i,j)).gt.1 .and. abs(wfbc(i,j)).lt.100) then
C	write(6,*) 'ww values ',
C     +  ww(i00,j00),ww(i10,j10),
C     +  ww(i01,j01),ww(i11,j11)
C	write(6,*) 'output value: ', wfbc(i,j)
	endif

	endif
          enddo
              enddo
!-----------------------------------------------------------------------
      return
      end
!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
c===============================================================================
c 
C      subroutine ltlwin(ald,apd,im,jm,pus,pvs,tlm0d,dtr,ctph0,stph0
C     &                 ,tpus,tpvs)
      subroutine ltlwin(ald,apd,pus,pvs,dtr
     &                 ,tpus,tpvs)
!     ******************************************************************
!     *                                                                *
!     *  ll to tll transformation of velocity                          *
!     *                                                                *
!     *  programer: z.janjic, yugoslav fed. hydromet. inst.,           *
!     *             beograd, 1982                                      *
!     *                                                                *
!     ******************************************************************
!
Cmp
	include 'ecommons.h'
      dimension
     & pus(im,jm),pvs(im,jm),tpus(im,jm),tpvs(im,jm)
     &,ald(im,jm),apd(im,jm)
!
              do j=1,jm
          do i=1,im
!
      relm=(ald(i,j)-tlm0d)*dtr
      srlm=sin(relm)
      crlm=cos(relm)
!
      ph=apd(i,j)*dtr
      sph=sin(ph)
      cph=cos(ph)
!
      cc=cph*crlm
      tph=asin(ctph0*sph-stph0*cc)
      rctph=1./cos(tph)
!
      cray=stph0*srlm*rctph
      dray=(ctph0*cph+stph0*sph*crlm)*rctph
!
      tpus(i,j)=dray*pus(i,j)-cray*pvs(i,j)
      tpvs(i,j)=cray*pus(i,j)+dray*pvs(i,j)
!
          enddo
              enddo
!-----------------------------------------------------------------------
      return
      end
!+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
c===============================================================================
C
C
      subroutine gtll(coh,inh,jnh,cov,inv,jnv,ald,apd,ime,jme,gproj,gds)
!-----------------------------------------------------------------------
      include 'ecommons.h'
      parameter(dtr=3.141592654/180.)
!
      character*2 gproj
	integer gds(200)
                 d i m e n s i o n
     & coh(3,im,jm),inh(4,im,jm),jnh(4,im,jm)
     &,cov(3,im,jm),inv(4,im,jm),jnv(4,im,jm)
     &,ald(im,jm),apd(im,jm)
!--------------- hibu domain geometry-----------------------------------

C	write(6,*) 'gds in  dutil: ', (gds(i),i=1,14)
      wb=wbd*dtr
      sb=sbd*dtr
      tph0=tph0d*dtr
      tlm0=tlm0d*dtr
      ctph0=cos(tph0)
      stph0=sin(tph0)
      dlm=dlmd*dtr
      dph=dphd*dtr
      tdlm=dlm+dlm
!-------------- entry to the hibu i,j loop -----------------------------
!               hibu height pts
!-----------------------------------------------------------------------
      tph=sb-dph
              do j=1,jm
          tph=tph+dph
          tlm=wb-tdlm+mod(j+1,2)*dlm
!
          do i=1,im
      tlm=tlm+tdlm
!------------- tll to ll conversion ------------------------------------
      call  rtll(tlm,tph,tlm0d,dtr,ctph0,stph0,almd,aphd)
!-------------conversion from -180,180 range to 0,360 range-------------
!      if(almd.lt.0.) almd=360.+almd
!--------------check if hibu pt is out of avn domain--------------------
	
	if (gproj .eq. 'PS') then
  	  call str_ij(aphd,almd,x,y,gds)
	elseif (gproj .eq. 'LC') then
	  call lcc_ij(aphd,almd,x,y,gds)
	elseif(gproj .eq. 'LL') then
	  call ced_ij(aphd,almd,x,y,gds)
        endif

!
            if (x .lt. 1. .or. x .gt. float(ime) .or.
     .          y .lt. 1. .or. y. gt. float(jme)) then
Cmp     if 360 X 181 grid assume periodicity and adjust the x index accordingly
        if (ime.eq. 360) then
        if (x .lt. 1) x=x+360.
        if (x .gt. ime) x=x-360.
	elseif (ime .eq. 144) then
C
C	reanalysis grid
C
	if (x .lt. 1) then
	write(6,*) 'aphd,almd,x,y ', aphd,almd,x,y
	if (x .lt. 0.5) x=144
	if (x .gt. 0.5) x=1
	endif

	if (x .gt. ime) then
	write(6,*) 'aphd,almd,x,y ', aphd,almd,x,y
	if (x .gt. ime+0.5) x=1
	if (x .lt. ime+0.5) x=ime
	endif

        else
               print *,'hibupt outside domain i,j=',i,j,aphd,almd,x,y
               stop
	endif
          endif
!
!-----------------------------------------------------------------------
C      coh(2,i,j)=x/delon
C      coh(3,i,j)=y/delat
            coh(2,i,j)=x-float(int(x))
            coh(3,i,j)=y-float(int(y))

      coh(1,i,j)=coh(2,i,j)*coh(3,i,j)
!-----------------------------------------------------------------------
      inh(1,i,j)=int(x)
        if (inh(1,i,j) .eq. 0 ) then
           inh(1,i,j)=ime
        end if
      inh(2,i,j)=inh(1,i,j)+1
      inh(3,i,j)=inh(1,i,j)
      inh(4,i,j)=inh(1,i,j)+1
!
C
C
          if(inh(1,i,j).eq.ime) then
      inh(2,i,j)=1
      inh(4,i,j)=1
          endif
!
      jnh(1,i,j)=int(y)
      jnh(2,i,j)=jnh(1,i,j)
      jnh(3,i,j)=jnh(1,i,j)+1
      jnh(4,i,j)=jnh(1,i,j)+1
          enddo
              enddo
!-----------------------------------------------------------------------
!                      wind points
!-----------------------------------------------------------------------
      tph=sb-dph
              do j=1,jm
          tph=tph+dph
          tlm=wb-tdlm+mod(j,2)*dlm
!
          do i=1,im
      tlm=tlm+tdlm
!--------------------- tll to ll conversion ----------------------------
      call  rtll(tlm,tph,tlm0d,dtr,ctph0,stph0,almd,aphd)
      ald(i,j)=almd
      apd(i,j)=aphd
!-------------conversion from -180,180 range to 0,360 range-------------
!      if(almd.lt.0.) almd=360.+almd
!-----------------------------------------------------------------------
!
!
	if (gproj .eq. 'PS') then
  	  call str_ij(aphd,almd,x,y,gds)
	elseif (gproj .eq. 'LC') then
	  call lcc_ij(aphd,almd,x,y,gds)
	elseif(gproj .eq. 'LL') then
	  call ced_ij(aphd,almd,x,y,gds)
        endif

            if (x .lt. 1. .or. x .gt. float(ime) .or.
     .          y .lt. 1. .or. y. gt. float(jme)) then
Cmp     if 360 X 181 grid assume periodicity and adjust the x index accordingly
        if (ime.eq. 360) then
        if (x .lt. 1) x=x+360.
        if (x .gt. ime) x=x-360.
	elseif (ime .eq. 144) then
C
C	reanalysis grid
C
	if (x .lt. 1) then
	if (x .lt. 0.5) x=144
	if (x .gt. 0.5) x=1
	endif

	if (x .gt. ime) then
	if (x .gt. ime+0.5) x=1
	if (x .lt. ime+0.5) x=ime
	endif

        else
           print *,'wind point outside domain i,j=',i,j,aphd,almd,x,y
               stop
        endif
            endif

!
!-----------------------------------------------------------------------
      cov(2,i,j)=x-float(int(x))
      cov(3,i,j)=y-float(int(y))
      cov(1,i,j)=cov(2,i,j)*cov(3,i,j)
!-----------------------------------------------------------------------
      inv(1,i,j)=int(x)
        if (inv(1,i,j) .eq. 0) then
           inv(1,i,j)=ime
        endif
      inv(2,i,j)=inv(1,i,j)+1
      inv(3,i,j)=inv(1,i,j)
      inv(4,i,j)=inv(1,i,j)+1
!
          if(inv(1,i,j).eq.ime) then
      inv(2,i,j)=1
      inv(4,i,j)=1
          endif
!
      jnv(1,i,j)=int(y)
      jnv(2,i,j)=jnv(1,i,j)
      jnv(3,i,j)=jnv(1,i,j)+1
      jnv(4,i,j)=jnv(1,i,j)+1
          enddo
              enddo
!-----------------------------------------------------------------------
      return
      end

c
      subroutine blwts(coh,inh,jnh,cov,inv,jnv,ald,apd
     .                ,gproj)
c
c *** Compute bilinear interpolation weights.
c
      implicit none
c
      include 'ecommons.h'
c
      real*4 coh(3,imjm),inh(4,imjm),jnh(4,imjm)
     .      ,cov(3,imjm1),inv(4,imjm1),jnv(4,imjm1)
     .      ,ald(imjm1),apd(imjm1)
     .      ,khl0(jm),kvl0(jm),khh0(jm),kvh0(jm)
     .      ,tdlmd
     .      ,tphd,tlmd,aphd,almd,x,y
c
	integer GDS(200)
      integer*4 khl,khh,kvl,kvh
     .         ,i,j,k
c
      character*2 gproj
c
      integer*4 nxsec,nysec,nzsec
      common /sectorsize/nxsec,nysec,nzsec
c_______________________________________________________________________________
c
      write(6,*) 'in blwts:'
C     print *,'im=',im,'jm=',jm
C     print *,'Input data dimensions:',nxsec,nysec,nzsec
c
c *** Hibu model conts.
c
      do j=1,jm
         khl0(j)=im*(j-1)-(j-1)/2+1
         kvl0(j)=im*(j-1)   - j/2+1
         khh0(j)=im* j      - j/2
         kvh0(j)=im* j   -(j+1)/2
      enddo
c
c *** Define some constants.
c
      tdlmd=dlmd+dlmd
c
c *** Compute weights for hibu height pts.
c
      tphd=sbd-dphd
c
      do j=1,jm
         khl=khl0(j)
         khh=khh0(j)
         tphd=tphd+dphd
c
         do k=khl,khh
            tlmd=wbd+tdlmd*(k-khl)*mod(j,2)
     .          +mod(j+1,2)*(dlmd+(k-khl)*tdlmd)
c
c ********* tll to ll conversion.
c
            call rtll(tlmd,tphd,tlm0d,ctph0,stph0,almd,aphd)
c
c ********* Determine location of eta grid point in native data i,j space.
c
            if (gproj .eq. 'PS') then
	    	call str_ij(aphd,almd,x,y,gds)
            elseif (gproj .eq. 'LC') then
	    	call lcc_ij(aphd,almd,x,y,gds)
            elseif (gproj .eq. 'LL') then
	    	call ced_ij(aphd,almd,x,y,gds)
            endif

c
c ********* Check if hibu pt is out of native data domain.
c
C          print *,'k,lat,lon,x,y ',k,aphd,almd,x,y
            if (x .lt. 1. .or. x .gt. float(nxsec) .or.
     .          y .lt. 1. .or. y. gt. float(nysec)) then 
Cmp               print *,'hibupt outside domain k=',k,aphd,almd,x,y
Cmp	if 360 X 181 grid assume periodicity and adjust the x index accordingly
	if (nxsec .eq. 360) then
	if (x .lt. 1) x=x+360.
	if (x .gt. nxsec) x=x-360.
	else
               print *,'hibupt outside domain k=',k,aphd,almd,x,y
               stop
	endif
            endif
c
            coh(2,k)=x-float(int(x))
            coh(3,k)=y-float(int(y))
            coh(1,k)=coh(2,k)*coh(3,k)
c
            inh(1,k)=int(x)
            inh(2,k)=inh(1,k)+1
            inh(3,k)=inh(1,k)
            inh(4,k)=inh(1,k)+1
c
            jnh(1,k)=int(y)
            jnh(2,k)=jnh(1,k)
            jnh(3,k)=jnh(1,k)+1
            jnh(4,k)=jnh(1,k)+1
c
         enddo
      enddo
c
c *** Compute weights for hibu wind points
c
      tphd=sbd-dphd
c
      do j=1,jm
         kvl=kvl0(j)
         kvh=kvh0(j)
         tphd=tphd+dphd
c
         do k=kvl,kvh
            tlmd=wbd+dlmd*mod(j,2)+(k-kvl)*tdlmd
c
c ********* tll to ll conversion.
c
            call rtll(tlmd,tphd,tlm0d,ctph0,stph0,almd,aphd)
c
            ald(k)=almd
            apd(k)=aphd
c
c ********* Determine location of eta grid point in native data i,j space.
c
            if (gproj .eq. 'PS') then
	    	call str_ij(aphd,almd,x,y,gds)
            elseif (gproj .eq. 'LC') then
              	call lcc_ij(aphd,almd,x,y,gds)
            elseif (gproj .eq. 'LL') then
                call ced_ij(aphd,almd,x,y,gds)
            endif
c
c *** check if hibu pt is out of native data domain.
c
            if (x .lt. 1. .or. x .gt. float(nxsec) .or.
     .          y .lt. 1. .or. y. gt. float(nysec)) then 
cmp               print *,'wind point outside domain k=',k,aphd,almd,x,y
Cmp	if 360 X 181 grid assume periodicity and adjust the x index accordingly
	if (nxsec .eq. 360) then
	if (x .lt. 1) x=x+360.
	if (x .gt. nxsec) x=x-360.
	else
               print *,'wind point outside domain k=',k,aphd,almd,x,y
               stop
	endif
            endif
c
            cov(2,k)=x-float(int(x))
            cov(3,k)=y-float(int(y))
            cov(1,k)=cov(2,k)*cov(3,k)
c
            inv(1,k)=int(x)
            inv(2,k)=inv(1,k)+1
            inv(3,k)=inv(1,k)
            inv(4,k)=inv(1,k)+1
c
            jnv(1,k)=int(y)
            jnv(2,k)=jnv(1,k)
            jnv(3,k)=jnv(1,k)+1
            jnv(4,k)=jnv(1,k)+1
c
         enddo
      enddo
c
      return
      end
c
c===============================================================================
c
      subroutine get_sector_size(fname,gdsfile)
c
      implicit none
c
      integer*4 nx,ny,nz,nxsec,nysec,ip,jp,nsfcfld,l
	integer GDS(200)
      character*(*) fname
      character*(*) gdsfile
      character*2   gproj
c
      common/sectorsize/nxsec,nysec,nz
c_______________________________________________________________________________
c
      print *,' '
      l=index(fname//' ',' ')-1
      print *,'Ingesting data - file = ',fname(1:l)
      open(1,file=fname,status='old',form='unformatted')
	read(1) nz
c
c *** Read sector grid information.
c
        print*,'close read nz'
	close(14)
	open(14,file=gdsfile,status='old',form='unformatted')
       read(14) GDS
        print*,'close gDS'

	nxsec=gds(2)
	nysec=gds(3)

      close(1)
      close(14)
      return
      end
c
c===============================================================================
c
      subroutine getdata(fname,pr,uw,vw,ht,mr,sfcgrid)
c
c *** Read input upper air data.
c
      implicit none
c
      real*4 cpi,kappi
      parameter (cpi=1./1004.,kappi=1004./287.)
c
      integer*4 nx,ny,nz,dummy(7),nsfcfld,i,j,k,pres
c
      parameter(nsfcfld=16)!ioannis
c
Cmp      real*4 sfcgrid(nx,ny,nsfcfld)
cioannis      real*4 sfcgrid(nx,ny,12),tmp
      real*4 sfcgrid(nx,ny,nsfcfld),tmp
c
c *** Output data variables.
c
      real*4 uw(nx,ny,nz)    !u-wind (m/s)
     .      ,vw(nx,ny,nz)    !v-wind (m/s)
     .      ,ht(nx,ny,nz)    !height (m)
     .      ,mr(nx,ny,nz)    !mixing ratio (kg/kg)
     .      ,pr(nz)          !pressure (Pa)
c
      character*(*) fname
      character*2   gproj
c
      common /sectorsize/nx,ny,nz
c_______________________________________________________________________________
c
      print *,'In getdata'
      print *,'   - data sector size:  ',nx,ny,nz
c     print *,' '
c
c *** Open data file.
c
      open(1,file=fname,status='old',form='unformatted',err=100)
c
c *** Skip through header stuff and surface fields.
c
      rewind(1)

Cmp(2001/12/13 	eliminate header information)

c
c *** Read upper air data.
c        (Read in upside down since that is how ETA wants it.)
c
	write(6,*) 'reading in getdata ', nx,ny,nz

      read(1) dummy(1)
      read(1) (((uw(i,j,k),i=1,nx),j=1,ny),k=nz,1,-1)
      read(1) (((vw(i,j,k),i=1,nx),j=1,ny),k=nz,1,-1)
      read(1) (((ht(i,j,k),i=1,nx),j=1,ny),k=nz,1,-1)
      read(1) (((mr(i,j,k),i=1,nx),j=1,ny),k=nz,1,-1)

	write(6,*) 'U,V,Z,Q : ', uw(nx/2,ny/2,5),vw(nx/2,ny/2,5),
     +			ht(nx/2,ny/2,5),mr(nx/2,ny/2,5)
	read(1) (pr(k),k=nz,1,-1)
        read(1) sfcgrid

      close(1)
c
      do k=1,nz
	pr(k)=pr(k)*100.
      enddo
c
      return
100   print*,'Error reading upper data.'
c
      return
      end

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

	 subroutine str_ij(RLAT,RLON,XPTS,YPTS,KGDS)
      INTEGER KGDS(200)
      REAL XPTS,YPTS,RLON,RLAT
      PARAMETER(RERTH=6.3712E6)
      PARAMETER(PI=3.14159265358979,DPR=180./PI)
C
C       Hardwired for Grid 104
C      data kgds/005,147,110,-268,-139475,8,-105000,90755,90755,
C     +0,64,0/
C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	fill=-999

        IM=KGDS(2)
        JM=KGDS(3)
        RLAT1=KGDS(4)*1.E-3
        RLON1=KGDS(5)*1.E-3
        IROT=MOD(KGDS(6)/8,2)
        ORIENT=KGDS(7)*1.E-3
        DX=KGDS(8)
        DY=KGDS(9)
        IPROJ=MOD(KGDS(10)/128,2)
        ISCAN=MOD(KGDS(11)/128,2)
        JSCAN=MOD(KGDS(11)/64,2)
        NSCAN=MOD(KGDS(11)/32,2)
        H=(-1.)**IPROJ
        HI=(-1.)**ISCAN
        HJ=(-1.)**(1-JSCAN)
        DXS=DX*HI
        DYS=DY*HJ
        DE=(1.+SIN(60./DPR))*RERTH
        DR=DE*COS(RLAT1/DPR)/(1+H*SIN(RLAT1/DPR))
        XP=1-H*SIN((RLON1-ORIENT)/DPR)*DR/DXS
        YP=1+COS((RLON1-ORIENT)/DPR)*DR/DYS
        DE2=DE**2
        XMIN=0
        XMAX=IM+1
        YMIN=0
        YMAX=JM+1
        NRET=0
C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
C  TRANSLATE EARTH COORDINATES TO GRID COORDINATES
        IOPT=-1
        IF(IOPT.EQ.-1) THEN
            IF(ABS(RLON).LE.360.AND.ABS(RLAT).LE.90.AND.
     &                                 H*RLAT.NE.-90) THEN
              DR=DE*TAN((90-H*RLAT)/2/DPR)
C       write(6,*) 'DE,DR ', de,dr
              XPTS=XP+H*SIN((RLON-ORIENT)/DPR)*DR/DXS
              YPTS=YP-COS((RLON-ORIENT)/DPR)*DR/DYS
C       write(6,*) 'xpts,ypts ', xpts,ypts
              IF(XPTS.GE.XMIN.AND.XPTS.LE.XMAX.AND.
     &           YPTS.GE.YMIN.AND.YPTS.LE.YMAX) THEN
                NRET=NRET+1
              ELSE
                XPTS=FILL
                YPTS=FILL
              ENDIF
            ELSE
              XPTS=FILL
              YPTS=FILL
            ENDIF
        ENDIF
C - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
        return
        END

CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

Cfut	subroutine lcc_ij(KGDS,RLAT,RLON,XPTS,YPTS)
	subroutine lcc_ij(RLAT,RLON,XPTS,YPTS,KGDS)

C
C	based on iplib GDSWIZ03 by M. Iredell

C   INPUT ARGUMENT LIST:
C     KGDS     - INTEGER (200) GDS PARAMETERS AS DECODED BY W3FI63
C     RLON     - REAL EARTH LONGITUDE IN DEGREES E
C                (ACCEPTABLE RANGE: -360. TO 360.)
C     RLAT     - REAL EARTH LATITUDE IN DEGREES N 
C                (ACCEPTABLE RANGE: -90. TO 90.)
C

C    OUTPUT ARGUMENT LIST:
C     XPTS     - REAL GRID X POINT COORDINATE 
C     YPTS     - REAL GRID Y POINT COORDINATE

	INTEGER KGDS(200)
	REAL XPTS,YPTS,RLON,RLAT
      PARAMETER(RERTH=6.3712E6)
      PARAMETER(PI=3.14159265358979,DPR=180./PI)

Cmp	hardwired gds for 212 for the moment
C	data kgds/003,185,129,12190,-133459,8,-95000,40365,
C     +		40365,0,64,25000,25000,187*-1/

	fill=-999

	
        IM=KGDS(2)
        JM=KGDS(3)
        RLAT1=KGDS(4)*1.E-3
        RLON1=KGDS(5)*1.E-3
        IROT=MOD(KGDS(6)/8,2)
        ORIENT=KGDS(7)*1.E-3
        DX=KGDS(8)
        DY=KGDS(9)
        IPROJ=MOD(KGDS(10)/128,2)
        ISCAN=MOD(KGDS(11)/128,2)
        JSCAN=MOD(KGDS(11)/64,2)
        NSCAN=MOD(KGDS(11)/32,2)
        RLATI1=KGDS(12)*1.E-3
        RLATI2=KGDS(13)*1.E-3
        H=(-1.)**IPROJ
        HI=(-1.)**ISCAN
        HJ=(-1.)**(1-JSCAN)
        DXS=DX*HI
        DYS=DY*HJ
        IF(RLATI1.EQ.RLATI2) THEN
          AN=SIN(H*RLATI1/DPR)
        ELSE
          AN=LOG(COS(RLATI1/DPR)/COS(RLATI2/DPR))/
     &       LOG(TAN((H*RLATI1+90)/2/DPR)/TAN((H*RLATI2+90)/2/DPR))
        ENDIF
        DE=RERTH*COS(RLATI1/DPR)*TAN((H*RLATI1+90)/2/DPR)**AN/AN
        IF(H*RLAT1.EQ.90) THEN
          XP=1
          YP=1
        ELSE
          DR=DE/TAN((H*RLAT1+90)/2/DPR)**AN
          DLON1=MOD(RLON1-ORIENT+180+3600,360.)-180
          XP=1-H*SIN(AN*DLON1/DPR)*DR/DXS
          YP=1+COS(AN*DLON1/DPR)*DR/DYS
        ENDIF
        ANTR=1/(2*AN)
        DE2=DE**2
        XMIN=0
        XMAX=IM+1
        YMIN=0
        YMAX=JM+1
        NRET=0
C
C  TRANSLATE EARTH COORDINATES TO GRID COORDINATES
C

            IF(ABS(RLON).LE.360.AND.ABS(RLAT).LE.90.AND.
     &                                 H*RLAT.NE.-90) THEN
              DR=DE*TAN((90-H*RLAT)/2/DPR)**AN
              DLON=MOD(RLON-ORIENT+180+3600,360.)-180
              XPTS=XP+H*SIN(AN*DLON/DPR)*DR/DXS
              YPTS=YP-COS(AN*DLON/DPR)*DR/DYS
C	write(6,*) 'executed... ', xpts,ypts
              IF(XPTS.GE.XMIN.AND.XPTS.LE.XMAX.AND.
     &           YPTS.GE.YMIN.AND.YPTS.LE.YMAX) THEN
                NRET=NRET+1
              ELSE
                XPTS=FILL
                YPTS=FILL
              ENDIF
            ELSE
              XPTS=FILL
              YPTS=FILL
            ENDIF

	return
	end
CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC

	subroutine ced_ij(RLAT,RLON,XPTS,YPTS,KGDS)

	integer kgds(200)


	fill=-999
	LROT=-999
	
	IM=KGDS(2)
        JM=KGDS(3)
        RLAT1=KGDS(4)*1.E-3
        RLON1=KGDS(5)*1.E-3
        RLAT2=KGDS(7)*1.E-3
        RLON2=KGDS(8)*1.E-3
        ISCAN=MOD(KGDS(11)/128,2)
        JSCAN=MOD(KGDS(11)/64,2)
        NSCAN=MOD(KGDS(11)/32,2)
        HI=(-1.)**ISCAN
        HJ=(-1.)**(1-JSCAN)
        DLON=HI*(MOD(HI*(RLON2-RLON1)-1+3600,360.)+1)/(IM-1)
        DLAT=(RLAT2-RLAT1)/(JM-1)
        XMIN=0
        XMAX=IM+1
        IF(IM.EQ.NINT(360/ABS(DLON))) XMAX=IM+2
        YMIN=0
        YMAX=JM+1
        NRET=0

            IF(ABS(RLON).LE.360.AND.ABS(RLAT).LE.90) THEN
              XPTS=1+HI*MOD(HI*(RLON-RLON1)+3600,360.)/DLON
              YPTS=1+(RLAT-RLAT1)/DLAT
              IF(XPTS.GE.XMIN.AND.XPTS.LE.XMAX.AND.
     &           YPTS.GE.YMIN.AND.YPTS.LE.YMAX) THEN
                NRET=NRET+1
                IF(LROT.EQ.1) THEN
                  CROT=1
                  SROT=0
                ENDIF
              ELSE
                XPTS=FILL
                YPTS=FILL
              ENDIF
            ELSE
              XPTS=FILL
              YPTS=FILL
            ENDIF

	return
	end
