I get:
942363691 228074 ruc2anl_130_20090605_2200_000.grb.
What do those numbers represent? I am not familiar with the cksum command.
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 6:49 PM, George Trojan - NOAA Federal <
george.trojan@xxxxxxxx> wrote:
> 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/
>>>>>
>>>>>
>>>>
>>>
>>
>
