Re: [ldm-users] cnvgrib Utility Help

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
>>
>> _______________________________________________
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>> ldm-users@xxxxxxxxxxxxxxxx
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>> http://www.unidata.ucar.edu/mailing_lists/
>>
>>
>
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