Either the input file is corrupted, or your version of cnvgrib is bad. Try
this to eliminate the first possibility:
$ cksum ruc2anl_130_20090605_2200_000.grb2
492053148 21637412 ruc2anl_130_20090605_2200_000.grb2
The numbers 492053148 21637412 should be the same.
On Tue, Apr 19, 2016 at 10:42 PM, Michelle Serino <mmserino@xxxxxxxx> wrote:
> When I do 'wgrib ruc2anl_130_20090605_2200_000.grb,' I get,
> '1:0:d=09060522:HGT:kpds5=7:kpds6=100:kpds7=1000:TR=1:P1=0:P2=0:TimeU=1:1000
> mb:anl:NAve=0,' and that is the only output. I am not sure exactly how
> to read that output and if that indicates that there is only one field.
>
> I got the length of the .grb file as only 228074 bytes: -rwxr-xr-x 1
> mserino 30490 228074 Apr 7 17:39 ruc2anl_130_20090605_2200_000.grb
>
> 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
>
> On Tue, Apr 19, 2016 at 6:00 PM, George Trojan - NOAA Federal <
> george.trojan@xxxxxxxx> wrote:
>
>> Does wgrib list only one field? I just ran convert on the same file.
>> There should be 317 data fields. What is the length of .grb file? I got
>> 65403248 bytes.
>>
>> George
>>
>> On Tue, Apr 19, 2016 at 9:31 PM, Michelle Serino <mmserino@xxxxxxxx>
>> wrote:
>>
>>> Thank you everyone for getting back to me.
>>>
>>> My apologies for not including the location of my data. I downloaded it
>>> from http://nomads.ncdc.noaa.gov/data/rucanl/ for the appropriate date
>>> and time. Let me respond to everyone's suggestions.
>>>
>>> 1. When I run:
>>>
>>> od -c ruc2anl_130_20090605_2200_000.grb | less
>>>
>>> I get output:
>>>
>>> 0000000 051107 041111 075003 000752 000000 001034 064407 100202
>>>
>>> 0000020 062007 164003 003011 013005 000400 000000 000001 000000
>>>
>>> 0000040 000025 000400 000000 000052 001777 141401 050401 037400
>>>
>>> 0000060 100631 135354 100410 014163 032000 000351 164464 040000, etc.
>>>
>>>
>>> 2. When I run:
>>>
>>>
>>> wgrib ruc2anl_130_20090605_2200_000.grb
>>>
>>>
>>> I get output:
>>>
>>>
>>> 1:0:d=09060522:HGT:kpds5=7:kpds6=100:kpds7=1000:TR=1:P1=0:P2=0:TimeU=1:1000
>>> mb:anl:NAve=0
>>>
>>> 3. When I run:
>>>
>>> wgrib -v ruc2anl_130_20090605_2200_000.grb
>>>
>>>
>>> I get similar output:
>>>
>>>
>>> 1:0:D=2009060522:HGT:1000 mb:kpds=7,100,1000:anl:winds in grid
>>> direction:"Geopotential height [gpm]
>>>
>>> 4. George, you mentioned that "It is possible that the program does
>>> not know about GRIB2 fields, specific to the office that created the file."
>>> By program, are you referring to the program I am using to process these
>>> data? Or are you referring to another program? I am not able to test the
>>> wgrib2 command at the moment because I do not have the permissions to
>>> install it (my advisor will have to do that).
>>>
>>>
>>> It appears that wgrib at least recognizes the *.grb file. Are the lists
>>> of the grids as they should be? Perhaps something small is getting lost in
>>> the conversion process that my processing code (using Warning Decision
>>> Support System - Integrated Information algorithms) cannot reconcile?
>>>
>>>
>>> Thank you for the continued help!
>>>
>>> Michelle
>>>
>>> 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
>>>
>>> On Mon, Apr 18, 2016 at 1:52 AM, Michael Dross <
>>> mdross@xxxxxxxxxxxxxxxxxx> wrote:
>>>
>>>> If you have wgrib installed do a
>>>>
>>>> wgrib -v ruc2anl_130_20090605_2200_000.grb
>>>>
>>>>
>>>> If it converted it correctly you should get a listing of the grids. If
>>>> not, something is amiss with the cnvgrib you have.
>>>>
>>>> - Mike
>>>>
>>>>
>>>> Sent from my iPad
>>>>
>>>> On Apr 17, 2016, at 9:11 PM, Michelle Serino <mmserino@xxxxxxxx> 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
>>>>
>>>> _______________________________________________
>>>> ldm-users mailing list
>>>> ldm-users@xxxxxxxxxxxxxxxx
>>>> For list information or to unsubscribe, visit:
>>>> http://www.unidata.ucar.edu/mailing_lists/
>>>>
>>>>
>>>
>>
>
