SPTGPTSD

The SPTGPTSD routine performs a Spherical transform
             From Spectral coefficients of scalar quantities
             to specified sets of station point values
             and their gradients on the globe.
             The wave-space can be either Triangular or Rhomboidal.
             The wave and point fields may have general indexing,
             but each wave field is in sequential 'IBM order',
             i.e. with zonal wavenumber as the slower index.
             The transforms are all multiprocessed over stations.
             transform several fields at a time to improve vectorization.
             Subprogram can be called from a multiprocessing environment.
 
USAGE:    CALL SPTGPTSD(IROMB,MAXWV,KMAX,NMAX,
                        KWSKIP,KGSKIP,NRSKIP,NGSKIP,
                        RLAT,RLON,WAVE,GP,XP,YP)

   Input arguments:
      IROMB    - INTEGER SPECTRAL DOMAIN SHAPE
                 (0 FOR TRIANGULAR, 1 FOR RHOMBOIDAL)
      MAXWV    - INTEGER SPECTRAL TRUNCATION
      KMAX     - INTEGER NUMBER OF FIELDS TO TRANSFORM.
      NMAX     - INTEGER NUMBER OF STATION POINTS TO RETURN
      KWSKIP   - INTEGER SKIP NUMBER BETWEEN WAVE FIELDS
                 (DEFAULTS TO (MAXWV+1)*((IROMB+1)*MAXWV+2) IF KWSKIP=0)
      KGSKIP   - INTEGER SKIP NUMBER BETWEEN STATION POINT SETS
                 (DEFAULTS TO NMAX IF KGSKIP=0)
      NRSKIP   - INTEGER SKIP NUMBER BETWEEN STATION LATS AND LONS
                 (DEFAULTS TO 1 IF NRSKIP=0)
      NGSKIP   - INTEGER SKIP NUMBER BETWEEN STATION POINTS
                 (DEFAULTS TO 1 IF NGSKIP=0)
      RLAT     - REAL (*) STATION LATITUDES IN DEGREES
      RLON     - REAL (*) STATION LONGITUDES IN DEGREES
      WAVE     - REAL (*) WAVE FIELDS

   Output arguments:
      GP       - REAL (*) STATION POINT SETS
      XP       - REAL (*) STATION POINT X-GRADIENT SETS
      YP       - REAL (*) STATION POINT Y-GRADIENT SETS

 
SPLIB.tar Library contains routines to be be used for a variety of spectral transform functions. (Fortran90)
Date posted: 2/23/2007