plucky (3) getpoly.c.3.gz

NAME

       getpoly.c - Return the J, K, and M pentagonal resolution parameters specified in a GRIB Grid Definition
       Section used spherical harmonic coefficients using GDT 5.50 through 5.53.

SYNOPSIS

       #include 'grib2_int.h'
       #include <stdio.h>
       #include <stdlib.h>

   Functions
       g2int getpoly (unsigned char *csec3, g2int *jj, g2int *kk, g2int *mm)
           This subroutine returns the J, K, and M pentagonal resolution parameters specified in a GRIB Grid
           Definition Section (GDS) used spherical harmonic coefficients using GDT 5.50 through 5.53.

Detailed Description

       Return the J, K, and M pentagonal resolution parameters specified in a GRIB Grid Definition Section used
       spherical harmonic coefficients using GDT 5.50 through 5.53.

       Author
           Stephen Gilbert

       Date
           2002-12-11

       Definition in file getpoly.c.

Function Documentation

   g2int getpoly (unsigned char * csec3, g2int * jj, g2int * kk, g2int * mm)
       This subroutine returns the J, K, and M pentagonal resolution parameters specified in a GRIB Grid
       Definition Section (GDS) used spherical harmonic coefficients using GDT 5.50 through 5.53. If 51 -
       complex data spectral packing is used as the data representation template number (see Table 5.0), then
       the Grid Definition Template Number in section 3 should be one of:

       • 50: Spherical Harmonic Coefficients (See Template 3.50)

       • 51: Rotated Spherical Harmonic Coefficients (See Template 3.51)

       • 52: Stretched Spherical Harmonic Coefficients (See Template 3.52)

       • 53: Rotated and Stretched Spherical Harmonic Coefficients (See Template 3.53)

       Parameters
           csec3 Character array that contains the packed GRIB2 GDS.
           jj J pentagonal resolution parameter.
           kk K pentagonal resolution parameter.
           mm M pentagonal resolution parameter.

       Returns
           always returns 0.

       Note
           Returns jj, kk, and mm set to zero, if grid template not recognized.

       Author
           Stephen Gilbert

       Date
           2002-12-11

       Definition at line 40 of file getpoly.c.

       References g2_unpack3().

       Referenced by g2_addfield().

Author

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