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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
SUBROUTINE NMAKGG( KTRUNC, KNEXT, PLAT, KNUM, PLEG, KRET)
C
C---->
C**** NMAKGG
C
C PURPOSE
C _______
C
C This routine creates legendre functions for latitude rows from
C the given latitude.
C
C INTERFACE
C _________
C
C CALL NMAKGG( KTRUNC, KNEXT, PLAT, KNUM, PLEG, KRET)
C
C Input parameters
C ________________
C
C KTRUNC - Truncation.
C KNEXT - Index (in PLAT) of next latitude at which to start
C PLAT - Array of gaussian latitudes
C KNUM - Number of latitudes to produce
C
C Output parameters
C ________________
C
C PLEG - Array of legendre functions for the latitude.
C KRET - Return status code
C 0 = OK
C
C Common block usage
C __________________
C
C JDCNDBG
C
C Method
C ______
C
C See below.
C
C Externals
C _________
C
C INTLOG - Output log message
C INTLOGR - Output log message (with real value)
C
C Reference
C _________
C
C None.
C
C Comments
C ________
C
C None at present.
C
C AUTHOR
C ______
C
C J.D.Chambers *ECMWF* June 1999
C
C MODIFICATIONS
C _____________
C
C None.
C
C----<
C
IMPLICIT NONE
C
#include "jparams.h"
#include "parim.h"
C
C Parameters
C
INTEGER JPROUTINE
PARAMETER ( JPROUTINE = 30500 )
C
C Subroutine arguments
C
INTEGER KTRUNC, KNEXT, KRET, KNUM
REAL PLEG, PLAT
DIMENSION PLEG(*), PLAT(*)
C
C Local variables
C
INTEGER NEXT, ILAT
REAL ALAT, DEG2RAD
C
C _______________________________________________________
C
C* Section 1. Initialization.
C _______________________________________________________
C
100 CONTINUE
C
IF ( NDBG .GT. 1) THEN
CALL INTLOG(JP_DEBUG,'NMAKGG: Input parameters:',JPQUIET)
CALL INTLOG(JP_DEBUG,'NMAKGG: Truncation = ', KTRUNC)
CALL INTLOG(JP_DEBUG,'NMAKGG: Number of latitudes = ', KNUM)
CALL INTLOG(JP_DEBUG, 'NMAKGG: Next latitude = ', KNEXT)
CALL INTLOGR(JP_DEBUG, 'NMAKGG: Lat.in degrees = ', PLAT(KNEXT))
ENDIF
C
C _______________________________________________________
C
C* Section 2. Processing.
C _______________________________________________________
C
DEG2RAD = PPI / 180.0
C
NEXT = 1
DO ILAT = 1, KNUM
ALAT = PLAT(KNEXT+ILAT-1) * DEG2RAD
C
IF ( NDBG .GT. 1) CALL INTLOGR(JP_DEBUG,
X 'NMAKGG: Next latitude constructed = ', ALAT)
C
CALL JSPLEG1( PLEG(NEXT), ALAT, KTRUNC)
NEXT = NEXT + (KTRUNC+1)*(KTRUNC+4)/2
ENDDO
C _______________________________________________________
C
C* Section 9. Return to calling routine. Format statements
C _______________________________________________________
C
900 CONTINUE
KRET = 0
C
990 CONTINUE
RETURN
END
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