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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