Provided by: libg2c-dev_1.6.4-3_amd64 
NAME
specunpack.c - Unpack a spectral data field that was packed using the complex packing
algorithm for spherical harmonic data.
SYNOPSIS
#include <stdio.h> #include <stdlib.h> #include <math.h> #include 'grib2.h' Functions g2int specunpack (unsigned char *cpack, g2int *idrstmpl, g2int ndpts, g2int JJ, g2int KK, g2int MM, g2float *fld) This subroutine unpacks a spectral data field that was packed using the complex packing algorithm for spherical harmonic data as defined in the GRIB2 documention, using info from the GRIB2 Data Representation Template 5.51.
Detailed Description
Unpack a spectral data field that was packed using the complex packing algorithm for
spherical harmonic data.
Author
Stephen Gilbert
Date
2000-06-21
Definition in file specunpack.c.
Function Documentation
g2int specunpack (unsigned char * cpack, g2int * idrstmpl, g2int ndpts, g2int JJ, g2int KK,
g2int MM, g2float * fld)
This subroutine unpacks a spectral data field that was packed using the complex packing
algorithm for spherical harmonic data as defined in the GRIB2 documention, using info from
the GRIB2 Data Representation Template 5.51.
Parameters
cpack pointer to the packed data field.
idrstmpl pointer to the array of values for Data Representation Template 5.51.
ndpts The number of data values to unpack (real and imaginary parts).
JJ pentagonal resolution parameter.
KK pentagonal resolution parameter.
MM pentagonal resolution parameter.
fld Contains the unpacked data values. fld must be allocated with at least
ndpts*sizeof(g2float) bytes before calling this routine.
Returns
0 for success, -3 for wrong type.
Author
Stephen Gilbert
Date
2000-06-21
Definition at line 34 of file specunpack.c.
References gbits(), int_power(), and rdieee().
Referenced by g2_unpack7().
Author
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