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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 IGSETUP( KSEC1, KSEC2, KSEC4)
C
C---->
C**** IGSETUP
C
C Purpose
C -------
C
C Setup GRIB sections 1, 2 and 4 for the new interpolation product.
C
C
C Interface
C ---------
C
C IRET IGSETUP( KSEC1, KSEC2, KSEC4)
C
C Input
C -----
C
C KSEC1 - Section 1 values (for GRIBEX)
C KSEC2 - Section 2 values (for GRIBEX)
C KSEC3 - Section 4 values (for GRIBEX)
C
C Output
C ------
C
C KSEC1 - Modified section 1 values (for GRIBEX)
C KSEC2 - Modified section 2 values (for GRIBEX)
C KSEC3 - Modified section 4 values (for GRIBEX)
C
C Method
C ------
C
C Use common block values and existing values from the original GRIB
C product used for interpolation.
C
C
C Externals
C ---------
C
C INTLOG - Logs messages.
C
C
C Author
C ------
C
C J.D.Chambers ECMWF Aug 1994
C
C----<
C
IMPLICIT NONE
C
#include "parim.h"
#include "nifld.common"
#include "nofld.common"
C
C Parameter(s)
C
INTEGER JPROUTINE
PARAMETER ( JPROUTINE = 19100 )
C
C Function arguments
C
INTEGER KSEC1, KSEC2, KSEC4
DIMENSION KSEC1(*), KSEC2(*), KSEC4(*)
C
C Local variables
C
LOGICAL LIROTAT, LOROTAT
INTEGER ILOOP, ITEMP
C
C***********************************************************************
C Section 1. Startup.
C***********************************************************************
C
100 CONTINUE
C
IGSETUP = 0
C
C Check a recognized data representation type is being processed
C
IF ( (NOREPR .NE.JPREGULAR ) .AND.
X (NOREPR .NE.JPREGROT ) .AND.
X (NOREPR .NE.JPGAUSSIAN ) .AND.
X (NOREPR .NE.JPFGGROT ) .AND.
X (NOREPR .NE.JPQUASI ) .AND.
X (NOREPR .NE.JPQGGROT ) .AND.
X (NOREPR .NE.JPSPHROT ) .AND.
X (NOREPR .NE.JPSPHERE ) ) GOTO 910
C
C Set flags if input is rotated or if a rotation angle has been given
C
LIROTAT = (NIREPR.EQ.JPSPHROT).OR.
X (NIREPR.EQ.JPREGROT).OR.
X (NIREPR.EQ.JPFGGROT).OR.
X (NIREPR.EQ.JPQGGROT)
C
LOROTAT = ((NOROTA(1).NE.-9000000).AND.(NOROTA(1).NE.0)).OR.
X (NOROTA(2).NE.0)
C
C***********************************************************************
C Section 2. Setup output product section 1.
C***********************************************************************
C
200 CONTINUE
C
C Setup output if not given by input GRIB message
C (ie input is 'unpacked').
C
IF ( NIFORM .NE. 1 ) THEN
C
C Code table ( same as input )
C
KSEC1(1) = NOTABLE
C
C Originating centre = ECMWF
C
KSEC1(2) = 98
C
C Generating process ID = 255
C Grid definition = 255
C
KSEC1(3) = 255
KSEC1(4) = 255
C
C Parameter
C
KSEC1(6) = NOPARAM
C
C Level
C
KSEC1(7) = NOLEVT
KSEC1(8) = NOLEVEL
KSEC1(9) = 0
C
C Dummy date and time ( 1 Jan 1990, 1200 )
C
KSEC1(10) = 90
KSEC1(11) = 1
KSEC1(12) = 1
KSEC1(13) = 12
KSEC1(14) = 0
C
C Dummy verifying time (initialised analysis)
C
KSEC1(15) = 1
KSEC1(16) = 0
KSEC1(17) = 0
KSEC1(18) = 1
KSEC1(19) = 0
KSEC1(20) = 0
C
C Century ( = 20 )
C
KSEC1(21) = 20
C
C Lots of zeroes
C
DO 210 ILOOP = 22, 36
KSEC1(ILOOP) = 0
210 CONTINUE
C
C Allow for user specified output field values when input is packed
C
ELSE
C
C Code table
C
KSEC1(1) = NOTABLE
C
C Parameter
C
IF( LNOPARA ) KSEC1(6) = NOPARAM
C
C Level
C
IF( LNOLEVT ) KSEC1(7) = NOLEVT
IF( LNOLEVL ) THEN
KSEC1(8) = NOLEVEL
KSEC1(9) = 0
ENDIF
ENDIF
C
C Section 2 included, section 3 omitted
C
KSEC1(5) = 128
C
C Rest of section 1 kept unchanged from input product
C
C***********************************************************************
C Section 3. Setup output product section 2.
C***********************************************************************
C
300 CONTINUE
C
C Data representation type
C
C Adjust output representation type if field is rotated
C
IF( LIROTAT.OR.LOROTAT ) THEN
KSEC2(1) = NOREPR
IF(NOREPR.EQ.JPREGULAR ) KSEC2(1) = JPREGROT
IF(NOREPR.EQ.JPSPHERE ) KSEC2(1) = JPSPHROT
IF(NOREPR.EQ.JPQUASI ) KSEC2(1) = JPFGGROT
IF(NOREPR.EQ.JPQGGROT ) KSEC2(1) = JPFGGROT
IF(NOREPR.EQ.JPGAUSSIAN ) KSEC2(1) = JPFGGROT
C
ELSE
C
IF( (NOREPR.EQ.JPQUASI).OR.(NOREPR.EQ.JPQGGROT) ) THEN
KSEC2(1) = JPGAUSSIAN
ELSE
KSEC2(1) = NOREPR
ENDIF
ENDIF
C
C***********************************************************************
C Section 3.1. Setup section 2 for lat/long, equidistant
C cylindrical or plate carre grids.
C***********************************************************************
C
310 CONTINUE
C
IF ( (NOREPR.EQ.JPREGULAR).OR.(NOREPR.EQ.JPREGROT) ) THEN
C
C For south to north grids, only global area allowed (eg KWBC SST)
C
cs IF( KSEC2(4).LT.KSEC2(7) ) THEN
cs IF((NOAREA(1).NE.(-NOAREA(3))).AND.(NOAREA(3).NE.JP90)) THEN
cs CALL INTLOG(JP_ERROR,
cs X 'IGSETUP: Subareas not allowed interpolating',JPQUIET)
cs CALL INTLOG(JP_ERROR,
cs X 'IGSETUP: grids running from south to north',JPQUIET)
cs IGSETUP = JPROUTINE + 2
cs GOTO 900
cs ENDIF
cs ENDIF
C
C Number of points along a parallel
C
KSEC2(2) = NOWE
C
C Number of points along a meridian
C
KSEC2(3) = NONS
C
C Latitude and longitude of first grid point
C
IF( NOAREA(1).GE.0 ) THEN
KSEC2(4) = (NOAREA(1)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(4) = (NOAREA(1)-(JPMICRO/2)) / JPMICRO
ENDIF
IF( NOAREA(2).GE.0 ) THEN
KSEC2(5) = (NOAREA(2)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(5) = (NOAREA(2)-(JPMICRO/2)) / JPMICRO
ENDIF
C
C Resolution flag, increments are given
C
KSEC2(6) = 128
C
C Latitude and longitude of last grid point
C
IF( NOAREA(3).GE.0 ) THEN
KSEC2(7) = (NOAREA(3)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(7) = (NOAREA(3)-(JPMICRO/2)) / JPMICRO
ENDIF
IF( NOAREA(4).GE.0 ) THEN
KSEC2(8) = (NOAREA(4)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(8) = (NOAREA(4)-(JPMICRO/2)) / JPMICRO
ENDIF
C
C Flip latitudes if they run from south to north
C Set scanning mode flags
C
IF( KSEC2(4).LT.KSEC2(7) ) THEN
IF( LNOGRID ) THEN
ITEMP = KSEC2(7)
KSEC2(7) = KSEC2(4)
KSEC2(4) = ITEMP
KSEC2(11) = 0
ELSE
KSEC2(11) = 64
ENDIF
ELSE
KSEC2(11) = NOSCNM
ENDIF
C
C i and j direction increments
C
KSEC2(9) = (NOGRID(1) + (JPMICRO/2)) / JPMICRO
KSEC2(10) = (NOGRID(2) + (JPMICRO/2)) / JPMICRO
C
C Following left same as for input product
C - no.of vertical coordinate parameters,
C - lat/long of southern pole of rotation
C - lat/long of pole of stretching
C
C If rotated, put in new lat/long of southern pole of rotation
C
IF( LIROTAT.OR.LOROTAT ) THEN
IF( NOROTA(1).GE.0 ) THEN
KSEC2(13) = (NOROTA(1) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(13) = (NOROTA(1) - (JPMICRO/2)) / JPMICRO
ENDIF
IF( NOROTA(2).GE.0 ) THEN
KSEC2(14) = (NOROTA(2) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(14) = (NOROTA(2) - (JPMICRO/2)) / JPMICRO
ENDIF
ENDIF
C
C Regular grid flag
C
KSEC2(17) = 0
C
C Following left same as for input product
C - earth flag
C - components flag
C - reserved fields
C
ENDIF
C
C***********************************************************************
C Section 3.2. Setup section 2 for gaussian grids.
C***********************************************************************
C
320 CONTINUE
C
IF ( (NOREPR.EQ.JPGAUSSIAN).OR.
X (NOREPR.EQ.JPFGGROT).OR.
X (NOREPR.EQ.JPQUASI).OR.
X (NOREPR.EQ.JPQGGROT) ) THEN
C
C Number of points along a parallel
C
C For a regular gaussian grid only
IF( (NOREPR.EQ.JPGAUSSIAN).OR.(NOREPR.EQ.JPFGGROT) ) THEN
KSEC2(2) = NOWE
ELSE
KSEC2(2) = 0
ENDIF
C
C Number of points along a meridian
C
KSEC2(3) = NONS
C
C Latitude and longitude of first grid point
C
IF( NOAREA(1).GE.0 ) THEN
KSEC2(4) = (NOAREA(1)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(4) = (NOAREA(1)-(JPMICRO/2)) / JPMICRO
ENDIF
IF( NOAREA(2).GE.0 ) THEN
KSEC2(5) = (NOAREA(2)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(5) = (NOAREA(2)-(JPMICRO/2)) / JPMICRO
ENDIF
C
C Resolution flag
C
C For a regular gaussian grid only, increments are given
C
IF( (NOREPR.EQ.JPGAUSSIAN).OR.(NOREPR.EQ.JPFGGROT) ) THEN
KSEC2(6) = 128
ELSE
KSEC2(6) = 0
ENDIF
C
C Latitude and longitude of last grid point
C
IF( NOAREA(3).GE.0 ) THEN
KSEC2(7) = (NOAREA(3)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(7) = (NOAREA(3)-(JPMICRO/2)) / JPMICRO
ENDIF
IF( NOAREA(4).GE.0 ) THEN
KSEC2(8) = (NOAREA(4)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(8) = (NOAREA(4)-(JPMICRO/2)) / JPMICRO
ENDIF
C
C i direction increment
C
C For a regular gaussian grid, only
C
IF( (NOREPR.EQ.JPGAUSSIAN).OR.(NOREPR.EQ.JPFGGROT) ) THEN
KSEC2(9) = (((JP90)/NOGAUSS)+(JPMICRO/2)) / JPMICRO
ELSE
KSEC2(9) = 0
ENDIF
C
C Number of parallels between a pole and the Equator
C
KSEC2(10) = NOGAUSS
C
C Scanning mode flags
C
KSEC2(11) = NOSCNM
C
C Following left same as for input product
C - no.of vertical coordinate parameters,
C - lat/long of southern pole of rotation
C - lat/long of pole of stretching
C
C If rotated, put in new lat/long of southern pole of rotation
C
IF( LIROTAT.OR.LOROTAT ) THEN
IF( NOROTA(1).GE.0 ) THEN
KSEC2(13) = (NOROTA(1) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(13) = (NOROTA(1) - (JPMICRO/2)) / JPMICRO
ENDIF
IF( NOROTA(2).GE.0 ) THEN
KSEC2(14) = (NOROTA(2) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(14) = (NOROTA(2) - (JPMICRO/2)) / JPMICRO
ENDIF
ENDIF
C
C Regular grid flag
C
IF( (NOREPR.EQ.JPGAUSSIAN).OR.(NOREPR.EQ.JPFGGROT) ) THEN
KSEC2(17) = 0
ELSE
KSEC2(17) = 1
ENDIF
C
C Following left same as for input product
C - earth flag
C - components flag
C - reserved fields
C
C For reduced grid, move in number of points along each parallel
C
IF( (NOREPR.EQ.JPQUASI) .OR.
X (NOREPR.EQ.JPQGGROT) ) THEN
DO 325 ILOOP = 1, KSEC2(3)
KSEC2(22+ILOOP) = NOLPTS(ILOOP+NO1NS-1)
325 CONTINUE
ENDIF
C
ENDIF
C
C***********************************************************************
C Section 3.3. Setup section 2 for spherical harmonic coefficients.
C***********************************************************************
C
330 CONTINUE
C
IF ( (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT) ) THEN
C
C I, K, M pentagonal resolution parameters
C
KSEC2(2) = NORESO
KSEC2(3) = NORESO
KSEC2(4) = NORESO
C
C Representation type, associated legendre functions of the
C first kind
KSEC2(5) = 1
C
C Representation mode, complex packing
C
KSEC2(6) = 2
C
C Following left same as for input product
C - reserved words 7-11
C - no.of vertical coordinate parameters,
C - lat/long of southern pole of rotation
C - lat/long of pole of stretching
C - reserved words 17-22
C
C If rotated, put in new lat/long of southern pole of rotation
C
IF( LIROTAT.OR.LOROTAT ) THEN
IF( NOROTA(1).GE.0 ) THEN
KSEC2(13) = (NOROTA(1) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(13) = (NOROTA(1) - (JPMICRO/2)) / JPMICRO
ENDIF
IF( NOROTA(2).GE.0 ) THEN
KSEC2(14) = (NOROTA(2) + (JPMICRO/2)) / JPMICRO
ELSE
KSEC2(14) = (NOROTA(2) - (JPMICRO/2)) / JPMICRO
ENDIF
ENDIF
ENDIF
C
C***********************************************************************
C Section 4. Setup output product section 4.
C***********************************************************************
C
400 CONTINUE
C
C Number of values to be packed
C
IF ( (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT) ) THEN
KSEC4(1) = (NORESO + 1) * (NORESO + 2)
ELSE IF( (NOREPR.EQ.JPQUASI).OR.(NOREPR.EQ.JPQGGROT) ) THEN
KSEC4(1) = NOPCNT
ELSE
KSEC4(1) = NOWE * NONS
ENDIF
C
C If all the values are missing, set the count of values negative
C
IF(NOMISS.NE.0) THEN
KSEC4(1) = -KSEC4(1)
ENDIF
C
C Number of bits used for each packed value
C
KSEC4(2) = NOACC
C
C Type of data, spherical harmonic = 128, grid point = 0
C
IF ( (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT) ) THEN
KSEC4(3) = 128
ELSE
KSEC4(3) = 0
ENDIF
C
C Type of packing, spherical harmonic = complex
C
IF ( (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT) ) THEN
KSEC4(4) = 64
ELSE
KSEC4(4) = 0
ENDIF
C
C Type of data = floating point
C
KSEC4(5) = 0
C
C Additional flags indicator = none
C
KSEC4(6) = 0
C
C Reserved word, set to 0
C
KSEC4(7) = 0
C
C Following set to simplest case
C - no.of values indicator
C - secondary bitmaps indicator
C - values width indicator
C - no.of bits for 2nd order values
C
KSEC4(8) = 0
KSEC4(9) = 0
KSEC4(10) = 0
KSEC4(11) = 0
C
C Reserved words, set to 0
C
KSEC4(12) = 0
KSEC4(13) = 0
KSEC4(14) = 0
KSEC4(15) = 0
C
C If spherical harmonics, set following for complex packing
C
IF ( (NOREPR.EQ.JPSPHERE).OR.(NOREPR.EQ.JPSPHROT) ) THEN
C
C KSEC4(16), pointer to start of packed data, setup by packing
C KSEC4(17), scaling factor P, unchanged from input
C KSEC4(18), pentagonal resolution parameter J for packing of subset,
C unchanged from input
C KSEC4(19), pentagonal resolution parameter K for packing of subset,
C unchanged from input
C KSEC4(20), pentagonal resolution parameter M for packing of subset,
C unchanged from input
C
ELSE
DO 410 ILOOP = 16, 20
KSEC4(ILOOP) = 0
410 CONTINUE
ENDIF
C
C Words 21-33 reserved, set to zero.
C
DO 420 ILOOP = 21, 33
KSEC4(ILOOP) = 0
420 CONTINUE
C
C***********************************************************************
C Section 9. Closedown
C***********************************************************************
C
900 CONTINUE
C
RETURN
C
C Invalid data represntation type
C
910 CONTINUE
CALL INTLOG(JP_ERROR,
X 'IGSETUP: Data representation type not recognized: ',NOREPR)
CALL INTLOG(JP_ERROR,
X 'IGSETUP: Only the following types are recognized:',JPQUIET)
CALL INTLOG(JP_ERROR,'IGSETUP: Lat/long grid = ', JPREGULAR)
CALL INTLOG(JP_ERROR,'IGSETUP: Lat/long (rotated) = ', JPREGROT)
CALL INTLOG(JP_ERROR,'IGSETUP: regular gaussian = ', JPGAUSSIAN)
CALL INTLOG(JP_ERROR,'IGSETUP: reg gauss rotated = ', JPFGGROT)
CALL INTLOG(JP_ERROR,'IGSETUP: reduced gaussian = ', JPQUASI)
CALL INTLOG(JP_ERROR,'IGSETUP: red gauss rotated = ', JPQUASI)
CALL INTLOG(JP_ERROR,'IGSETUP: spherical harmonic = ', JPSPHERE)
CALL INTLOG(JP_ERROR,'IGSETUP: spectral (rotated) = ', JPSPHROT)
C
IGSETUP = JPROUTINE + 1
RETURN
END
|
