getpoly.c File Reference

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. More...

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

Go to the source code of this file.

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

getpoly()

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().