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|
C Copyright 1981-2007 ECMWF
C
C Licensed under the GNU Lesser General Public License which
C incorporates the terms and conditions of version 3 of the GNU
C General Public License.
C See LICENSE and gpl-3.0.txt for details.
C
INTEGER FUNCTION INTWAVE2(INGRIB,INLEN,OUTGRIB,OUTLEN)
C
C---->
C**** INTWAVE2
C
C Purpose
C -------
C
C Interpolate an ECMWF wave field wave field or a reduced
C latitude-longitude field
C
C
C Interface
C ---------
C
C IRET = INTWAVE2(INGRIB,INLEN,OUTGRIB,OUTLEN)
C
C Input
C -----
C
C INGRIB - Input field (packed).
C INLEN - Input field length (words).
C
C
C Output
C ------
C
C OUTGRIB - Output field (packed).
C OUTLEN - Output field length (words).
C
C
C Method
C ------
C
C Call interpolation routine; then repack into GRIB format.
C
C
C Externals
C ---------
C
C FIXAREA - Fixup area definition to correspond to grid definitions
C GRIBEX - Decode/encode GRIB product.
C JMEMHAN - Handles memory allocation.
C JDEBUG - Checks environment to switch on/off debug
C INTLOG - Log error message.
C WAVEXX1 - Interpolate wave fields (except 2D spectra)
C WV2DXXX - Interpolate wave 2D spectra fields
C MKFRAME - Create a 'frame' from a rectangular field
C MKBITMP - Apply a bitmap to a rectangular field
C
C
C Author
C ------
C
C S.Curic ECMWF Jun 2009
C
C
C----<
C
IMPLICIT NONE
C
C Function arguments
INTEGER INGRIB(*),OUTGRIB(*),INLEN,OUTLEN
C
#include "parim.h"
#include "nifld.common"
#include "nofld.common"
#include "intf.h"
#include "grfixed.h"
#include "jparams.h"
C
C Parameters
INTEGER JPROUTINE, JP2DSP, JP2DSPQ, JPMAXLT
PARAMETER (JPROUTINE = 40200 )
PARAMETER (JP2DSP = 250 )
C ^---- parameter number for 2D wave spectra (whole)
PARAMETER (JP2DSPQ = 251 )
C ^---- parameter number for 2D wave spectra (single)
PARAMETER (JPMAXLT = 1801 )
C
C Local variables
C
CHARACTER*1 HFUNC
REAL ZMISS
DATA ZMISS/9999.0/
INTEGER IWORD, IRET, ISIZE, NSPEC, LAT1, LOOP, IERR
INTEGER KNUM, NUM_E_W, NUM_N_S, NFULLNS, NFULLEW
REAL GRIDWE, GRIDNS, NORTH, SOUTH, WEST, EAST
INTEGER NUMPTS
DIMENSION NUMPTS(JPMAXLT)
#ifdef POINTER_64
INTEGER*8 INEWAVE, IDISTNW, IZ2DSP, INEWIDX
#endif
REAL NEWAVE
POINTER ( INEWAVE, NEWAVE )
DIMENSION NEWAVE( 1 )
REAL*4 DISTNEW
POINTER ( IDISTNW, DISTNEW )
DIMENSION DISTNEW( 1 )
REAL Z2DSP
POINTER ( IZ2DSP, Z2DSP )
DIMENSION Z2DSP( 1 )
INTEGER NEWIDX
POINTER ( INEWIDX, NEWIDX )
DIMENSION NEWIDX( 1 )
REAL RNLAT, RSLAT, STEP
INTEGER NUMTABL, NUMPROD
LOGICAL LCOEFFS, L98WAVE, LFRAME, LBITMP
LOGICAL LDEBUG
INTEGER NPARAM
INTEGER MISSLAT, KOLDNUM
C
C Externals
INTEGER WAVEXX2, WV2DXX2, AREACHK, FIXAREA
INTEGER NUMPTNS, NUMPTWE, JNORSGG, MKBITMP
C
C ------------------------------------------------------------------
C Section 1. Initialise
C ------------------------------------------------------------------
C
100 CONTINUE
C
INTWAVE2 = 0
C
LCOEFFS = .FALSE.
C
C Check if debug option turned on
CALL JDEBUG()
LDEBUG = NDBG.GT.0
C
C Allocate work array ZNFELDI if not already done.
C
IF( IZNJDCI.NE.1952999238 ) THEN
CALL JMEMHAN( 19, IZNFLDI, JPEXPAND, 1, IRET)
IF( IRET.NE.0 ) THEN
CALL INTLOG(JP_WARN,'INTWAVE2: ZNFELDI allocate fail',JPQUIET)
INTWAVE2= IRET
GOTO 900
ENDIF
IZNJDCI = 1952999238
ENDIF
C
C Unpack GRIB message headers (using ZMISS as missing data value).
C
cs IWORD = INLEN
IRET = 1
ISEC3(2) = NINT(ZMISS)
ZSEC3(2) = ZMISS
CALL GRIBEX (ISEC0,ISEC1,ISEC2,ZSEC2,ISEC3,ZSEC3,ISEC4,
X ZNFELDI,JPEXPAND,INGRIB,INLEN,IWORD,'D',IRET)
IF(IRET.GT.0) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: GRIBEX decoding failed.',JPQUIET)
INTWAVE2 = JPROUTINE + 1
GOTO 900
ENDIF
NPARAM = ISEC1(6)
C
C Check that the field can be handled
C
NUMTABL = ISEC1(2)*1000 + ISEC1(1)
NUMPROD = NUMTABL*1000 + ISEC1(6)
L98WAVE = (NUMTABL.EQ.98140).OR.
X (NUMPROD.EQ.98131229).OR.
X (NUMPROD.EQ.98131232).OR.
X (NIREPR.EQ.26)
IF( .NOT.L98WAVE ) THEN
CALL INTLOG(JP_WARN,'INTWAVE2: Not an ECMWF wave field',JPQUIET)
INTWAVE2 = JPROUTINE + 2
GOTO 900
ENDIF
IF( ISEC2(1).NE.0 ) THEN
CALL INTLOG(JP_WARN,
X 'INTWAVE2: Not a lat/long field',JPQUIET)
INTWAVE2 = JPROUTINE + 3
GOTO 900
ENDIF
IF( (ISEC2(6).NE.128) .OR. (ISEC2(10).LT.10) ) THEN
CALL INTLOG(JP_ERROR,
X 'INTWAVE2: Cannot handle longitude increment',ISEC2(10))
INTWAVE2 = JPROUTINE + 4
GOTO 900
ENDIF
C
C ------------------------------------------------------------------
C Section 2. Sort out interpolation area.
C ------------------------------------------------------------------
C
200 CONTINUE
C
NSPEC = 1
KNUM = ISEC2(3)
C
C Adjust (sub-)area limits to suit the grid
C
IRET = FIXAREA()
IF ( IRET .NE. 0 ) THEN
CALL INTLOG(JP_ERROR, 'INTWAVE2: FIXAREA failed.',JPQUIET)
INTWAVE2 = JPROUTINE + 5
GOTO 900
ENDIF
NORTH = FLOAT(NOAREA(1))/PPMULT
WEST = FLOAT(NOAREA(2))/PPMULT
SOUTH = FLOAT(NOAREA(3))/PPMULT
EAST = FLOAT(NOAREA(4))/PPMULT
C
C Calculate the number of points E-W and N-S in new grid area
C
IF( (NOREPR.EQ.JPQUASI) .OR. (NOREPR.EQ.JPGAUSSIAN)) THEN
GRIDWE = NOGAUSS
GRIDNS = 0
ELSE IF( NOREPR.EQ.JPREDLL ) THEN
GRIDWE = 360.0/NOLPTS((NOREDLL/2)+1)
GRIDNS = FLOAT(NOGRID(2))/PPMULT
ELSE
GRIDWE = FLOAT(NOGRID(1))/PPMULT
GRIDNS = FLOAT(NOGRID(2))/PPMULT
ENDIF
C
IRET = AREACHK(GRIDWE,GRIDNS,NORTH,WEST,SOUTH,EAST)
IF( IRET.NE.0 ) THEN
INTWAVE2 = JPROUTINE + 6
GOTO 900
ENDIF
NOAREA(1) = NINT(NORTH*PPMULT)
NOAREA(2) = NINT(WEST*PPMULT)
NOAREA(3) = NINT(SOUTH*PPMULT)
NOAREA(4) = NINT(EAST*PPMULT)
C
IF( (NOREPR.EQ.JPQUASI) .OR. (NOREPR.EQ.JPGAUSSIAN)) THEN
GRIDWE = 360.0/NOLPTS(NOGAUSS)
NUM_E_W = NUMPTWE(WEST,EAST,GRIDWE)
NFULLEW = NUMPTWE(0.0,360.0,GRIDWE) - 1
NUM_N_S = JNORSGG(SOUTH,ROGAUSS,NOGAUSS,1) -
X JNORSGG(NORTH,ROGAUSS,NOGAUSS,0) + 1
NFULLNS = NOGAUSS*2
ELSE IF( NOREPR.EQ.JPREDLL ) THEN
NUM_E_W = NUMPTWE(WEST,EAST,GRIDWE)
NFULLEW = NUMPTWE(0.0,360.0,GRIDWE) - 1
NUM_N_S = NUMPTNS(NORTH,SOUTH,GRIDNS)
NFULLNS = NOREDLL
ELSE
NUM_E_W = NUMPTWE(WEST,EAST,GRIDWE)
NFULLEW = NUMPTWE(0.0,360.0,GRIDWE) - 1
NUM_N_S = NUMPTNS(NORTH,SOUTH,GRIDNS)
NFULLNS = NUM_N_S
ENDIF
C
C
C--------------------------------------------------------------------
KNUM = NINS
cs KNUM = ISEC2(3)
IF( ISEC2(17).EQ.1 ) THEN
C
C Input field is a reduced latitude/longitude grid
C
C .. but it may be 'pseudo-gaussian' in layout
C (ie global, symmetric about the equator but no latitude
C at the equator)
C
IF( (ISEC2(4).NE.90000).AND.(MOD(ISEC2(3),2).EQ.0) ) THEN
C
DO LOOP = 1, ISEC2(3)
NUMPTS(LOOP) = ISEC2(22+LOOP)
ENDDO
C
ELSE
C
MISSLAT = (90000 - ISEC2(4))/ISEC2(10)
DO LOOP = 1, MISSLAT
NUMPTS(LOOP) = 0
ENDDO
KOLDNUM = 1 + (90000 - ISEC2(7))/ISEC2(10)
DO LOOP = 1, (KOLDNUM-MISSLAT)
NUMPTS(LOOP+MISSLAT) = ISEC2(22+LOOP)
ENDDO
DO LOOP = (KOLDNUM+1), KNUM
NUMPTS(LOOP) = 0
ENDDO
ENDIF
ENDIF
C--------------------------------------------------------------------
C ------------------------------------------------------------------
C Section 3. Interpolate wave fields other than 2D spectra.
C ------------------------------------------------------------------
C
300 CONTINUE
C
C Handle if not 2D spectra ..
C
IF( (ISEC1(6).NE.JP2DSP).AND.(ISEC1(6).NE.JP2DSPQ) ) THEN
IF( LDEBUG ) THEN
CALL INTLOG(JP_DEBUG,
X 'INTWAVE2: Interpolate wave flds other than 2D spectra',JPQUIET)
ENDIF
C
C Get some scratch space for the interpolated field.
C
ISIZE = NFULLEW * NUM_N_S
CALL JMEMHAN( 3, INEWAVE, ISIZE, 1, IRET)
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Get work space fail.',JPQUIET)
INTWAVE2 = JPROUTINE + 7
GOTO 900
ENDIF
C
ISIZE = NFULLEW * NFULLNS * 4
CALL JMEMHAN( 4, INEWIDX, ISIZE, 1, IRET)
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Get work space fail.',JPQUIET)
INTWAVE2 = JPROUTINE + 8
GOTO 900
ENDIF
C
ISIZE = NFULLEW * NFULLNS * 10
CALL JMEMHAN( 5, IDISTNW, ISIZE, 1, IRET)
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Get work space fail.',JPQUIET)
INTWAVE2 = JPROUTINE + 9
GOTO 900
ENDIF
C Interpolate the field
C
IRET = WAVEXX2(NPARAM,KNUM,NUMPTS,NUM_N_S,GRIDNS,GRIDWE,ZNFELDI,
X NEWAVE,NORTH,WEST,ZMISS)
IF( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Interpolation failed.',JPQUIET)
INTWAVE2 = JPROUTINE + 10
GOTO 900
ENDIF
C
C ------------------------------------------------------------------
C Section 4. Interpolate wave 2D spectra field.
C ------------------------------------------------------------------
C
ELSE
C
400 CONTINUE
IF( LDEBUG ) THEN
CALL INTLOG(JP_DEBUG,
X 'INTWAVE2: Interpolate wave 2D spectra field',JPQUIET)
ENDIF
C
C Find number of 2D spectra values at each point
C
IF( ISEC4(8).NE.0 ) LCOEFFS = .TRUE.
IF( (ISEC4(8).NE.0).AND.(ISEC1(6).NE.JP2DSPQ) ) THEN
NSPEC = ISEC4(50) * ISEC4(51)
NIMATR = 1
ELSE
NSPEC = 1
NIMATR = 0
ENDIF
C
C Get some scratch space for the interpolated field.
C
ISIZE = NSPEC * NFULLEW * NUM_N_S
CALL JMEMHAN( 3, INEWAVE, ISIZE, 1, IRET)
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Get work space fail.',JPQUIET)
INTWAVE2 = JPROUTINE + 11
GOTO 900
ENDIF
C
ISIZE = NFULLEW * NFULLNS
CALL JMEMHAN( 4, INEWIDX, ISIZE, 1, IRET)
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Get work space fail.',JPQUIET)
INTWAVE2 = JPROUTINE + 12
GOTO 900
ENDIF
C
C Interpolate the field
C
IRET = WV2DXX2(NIMATR,KNUM,NUMPTS,NUM_N_S,GRIDNS,GRIDWE,ZNFELDI,
X NEWAVE,NORTH,WEST,ZMISS)
IF( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: Interpolation failed.',JPQUIET)
INTWAVE2 = JPROUTINE + 13
GOTO 900
ENDIF
C
ENDIF
C
C ------------------------------------------------------------------
C Section 5. Pack the interpolated field into GRIB.
C ------------------------------------------------------------------
C
500 CONTINUE
C If a 'bitmap' has been specified, build the bitmap
C
LBITMP = LNOBITMP.AND.
X ((NOREPR.EQ.JPREGROT).OR.(NOREPR.EQ.JPREGULAR).OR.
X (NOREPR.EQ.JPGAUSSIAN))
IF( LBITMP ) THEN
CALL INTLOG(JP_DEBUG,'INTWAVE2: MKBITMP is enabled',JPQUIET)
IERR = MKBITMP(NUM_E_W,NUM_N_S,NEWAVE,ZMISS)
IF( IERR.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTFB: Problem applying bitmap',JPQUIET)
GOTO 900
ENDIF
ENDIF
C If a 'frame' has been specified, build the frame
C
LFRAME = LNOFRAME.AND.
X ((NOREPR.EQ.JPREGULAR).OR.(NOREPR.EQ.JPGAUSSIAN).OR.
X (NOREPR.EQ.JPREGROT ).OR.(NOREPR.EQ.JPFGGROT ) )
CALL INTLOG(JP_DEBUG,'INTWAVE2: NUM_E_W ',NUM_E_W)
CALL INTLOG(JP_DEBUG,'INTWAVE2: NUM_N_S ',NUM_N_S)
IF( LFRAME ) THEN
CALL INTLOG(JP_DEBUG,'INTWAVE2: MKFRAME is enabled',JPQUIET)
CALL INTLOG(JP_DEBUG,'INTWAVE2: NOFRAME ',NOFRAME)
CALL MKFRAME(NUM_E_W,NUM_N_S,NEWAVE,ZMISS,NOFRAME)
ENDIF
C
C GRIB sections 2 and 3 (bitmap) included
C
ISEC1(5) = 192
C
IF( (NOREPR.EQ.JPQUASI) .OR. (NOREPR.EQ.JPREDLL) ) THEN
C
C Reduced gaussian or reduced lat/long with (possible) subarea
C
IF( NOREPR.EQ.JPQUASI ) THEN
ISEC2(1) = JPGAUSSIAN
ISEC2(10)= NOGAUSS
ELSE
ISEC2(1) = JPREGULAR
ISEC2(10)= NINT(GRIDNS*1000.0)
ENDIF
ISEC2(2) = 255
ISEC2(3) = NUM_N_S
ISEC2(5) = NINT(WEST*1000.0)
ISEC2(6) = 0
ISEC2(8) = NINT(EAST*1000.0)
ISEC2(17)= 1
ISEC4(1) = 0
C
LAT1 = 0
510 CONTINUE
LAT1 = LAT1 + 1
IF( NOREPR.EQ.JPQUASI ) THEN
RNLAT = ROGAUSS(LAT1)
RSLAT = ROGAUSS(LAT1+NUM_N_S-1)
ELSE
RNLAT = 90.0 - (LAT1-1)*GRIDNS
RSLAT = 90.0 - (LAT1+NUM_N_S-2)*GRIDNS
ENDIF
IF( RNLAT.GT.NORTH ) GOTO 510
C
ISEC2(4) = NINT(RNLAT*1000.0)
ISEC2(7) = NINT(RSLAT*1000.0)
C
DO LOOP = LAT1, (NUM_N_S+LAT1-1)
ISEC2(23+LOOP-LAT1) = NOLPTS(LOOP)
ISEC4(1) = ISEC4(1) + ISEC2(23+LOOP-LAT1)
ENDDO
C
ELSE
C
C Regular gaussian or lat/long with (possible) subarea
C
IF( NOREPR.EQ.JPGAUSSIAN ) THEN
ISEC2(1) = JPGAUSSIAN
ELSE
ISEC2(1) = JPREGULAR
ENDIF
ISEC2(2) = NUM_E_W
ISEC2(3) = NUM_N_S
ISEC2(4) = NINT(NORTH*1000.0)
ISEC2(5) = NINT(WEST*1000.0)
ISEC2(6) = 128
ISEC2(7) = NINT(SOUTH*1000.0)
ISEC2(8) = NINT(EAST*1000.0)
ISEC2(9) = NINT(GRIDWE*1000.0)
IF( NOREPR.EQ.JPGAUSSIAN ) THEN
ISEC2(10) = NOGAUSS
ELSE
ISEC2(10) = NINT(GRIDNS*1000.0)
ENDIF
ISEC2(17)= 0
ISEC4(1) = NUM_E_W * NUM_N_S
ENDIF
C
C
ISEC3(2) = NINT(ZMISS)
ZSEC3(2) = ZMISS
C
ISEC4(1) = ISEC4(1) * NSPEC
ISEC4(2) = NOACC
IF( LCOEFFS ) ISEC4(6) = 16
C `-----> wave fields have additional flags for
C NC1 and NC2 coefficients (floats stored
C in integer array isec4)
IRET = 1
C
C If grid-point output, setup for 2nd order packing if requested.
C
IF( (NOREPR.NE.JPSPHERE) .AND. (NOREPR.NE.JPSPHROT) ) THEN
HFUNC = 'C'
IF( NOHFUNC.EQ.'K' ) THEN
HFUNC = 'K'
ISEC4(4) = 64
ISEC4(6) = 16
ISEC4(9) = 32
ISEC4(10) = 16
ISEC4(12) = 8
ISEC4(13) = 4
ISEC4(14) = 0
ISEC4(15) = -1
ELSE
ISEC4(4) = 0
ENDIF
ELSE
HFUNC = 'C'
IF( NOHFUNC.EQ.'C' ) THEN
ISEC2(6) = 2
ISEC4(4) = 64
ELSE IF( NOHFUNC.EQ.'S' ) THEN
ISEC2(6) = 1
ISEC4(4) = 0
ENDIF
ENDIF
C
CALL GRIBEX (ISEC0,ISEC1,ISEC2,ZSEC2,ISEC3,ZSEC3,ISEC4,
X NEWAVE,ISEC4(1),OUTGRIB,OUTLEN,IWORD,HFUNC,IRET)
C
IF ( IRET.NE.0 ) THEN
CALL INTLOG(JP_ERROR,'INTWAVE2: GRIBEX encoding failed.',IRET)
INTWAVE2 = JPROUTINE + 14
GOTO 900
ENDIF
OUTLEN = IWORD
C
C ------------------------------------------------------------------
C* Section 9. Closedown.
C ------------------------------------------------------------------
C
900 CONTINUE
C
C Clear change flags for next product processing
C
LCHANGE = .FALSE.
LSMCHNG = .FALSE.
C
RETURN
END
|
