Cnvgrib was developed at NCEP, not NCAR. You can find the source at
http://www.nco.ncep.noaa.gov/pmb/codes/GRIB2/
Your invocation of cnvgrib is OK, program synopsis is:
cnvgrib [-h] {-g12|-g21|-g22} [-m|-m0] [-nv]
[{-p0|-p2|-p31|-p32|-p40|-p41}] ingribfile outgribfile
Green colour is fine, for some reason the program sets the execute bits,
that does not affect the content of output file. My suggestions:
1. Check whether the output has non-zero length.
2. If you are on a Linux system, do from the command line:
od -c ruc2anl_130_20090605_2200_000.grb | less
You should see output like this:
0000000 G R I B \0 \0 \0 001
. . . .
3. Check whether the program wgrib recognizes the file:
wgrib ruc2anl_130_20090605_2200_000.grb
wgrib is available on Linux, if it it not on your system, use yum or
apt-get, depending on distribution. Or build from source:
http://www.cpc.ncep.noaa.gov/products/wesley/wgrib.html
It is possible that the program does not know about GRIB2 fields,
specific to the office that created the file. You can try
wgrib2 ruc2anl_130_20090605_2200_000.grb2
to see that all fields are listed by name, not parameter number. wgrib2
is available from the NCEP url.
George
On 18/04/16 01:11 AM, Michelle Serino wrote:
Hi all,
I am using NCAR's cnvgrib utility to convert grib2 RUC-Analysis data
to grib1. An example of one of these data files is below:
ruc2anl_130_20090605_2200_000.grb2
When I run the command,
cnvgrib
-g21 ruc2anl_130_20090605_2200_000.grb2 ruc2anl_130_20090605_2200_000.grb
the converting process seems to work. I get a file with an extension
of "grb." However, while the file type is listed as a data file, it
appears green, as an executable file. In addition, the code I am
using does not recognize the file as a grb1 file. (The code only
recognizes grb1 files.) The website to which I referred to use this
utility (http://blog.nssl.noaa.gov/wdssii/) did not list any
additional options to use besides the required '-g21.' Am I missing
something? This is my first implementation of the cnvgrib utility, so
I apologize if I have made a naive mistake. I appreciate any help.
Best regards,
Michelle Serino
Michelle M. Serino
M.S. Candidate
Texas A&M University
Atmospheric Sciences Dept.
Eller O&M, Suite 1017
College Station, TX 77843
(484) 769-0949
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