[gradsusr] Lats4d

[Wesley Ebisuzaki]

Jennifer,

    I was thinking about the present where the grb.gs script can write 
out a grib2 from grads.
In the future, it would be nice to build a grib2 writer into grads.  I 
agree that metadata
is a problem.  The g2grb.gs script stores the metadata in the grib2 
template file.  The
user can configure the  center/subcenter/processid/etc by modifying the 
template
file by using wgrib2.

          Wesley


Jennifer Adams wrote:
> GrADS could really benefit from being able to write out grib2. The 
> tricky parts would be populating all the metadata properly, which is 
> not easy, and designing a good user interface for controlling all the 
> metadata options. 
> --Jennifer
>
> On Nov 15, 2011, at 10:35 AM, Wesley Ebisuzaki wrote:
>
>> I would make a grib2 file.  (Directly from GrADS?  Convert from grib1 ->
>> grib2?)
>>
>> wgrib2 can change the various parameters by
>>
>>      wgrib2 IN.grb -set center C -set subcenter S  -set  
>> analysis_or_forecast_process_id P -set table_3.4 SCAN -grib OUT.grb
>>
>> C=center number
>> S=subcenter number
>> P=process id
>> SCAN=scan parameter
>>
>> Finally I would say, "Grib1 is obsolete, you are getting a grib2 file.  
>> Deal with it!"
>>
>> * I am not sure whether cnvgrib will handle files with center != NCEP *
>>
>> --------------------------------------------------------------------------------------------------------------------------------------
>>
>> Alternatively I would modify a short C program (see
>> ftp://ftp.cpc.ncep.noaa.gov/wd51we/grib_fixers)
>> to change the various parameters.
>>
>> If the tools were already installed and grib2 output were acceptable, I
>> would use the first procedure.
>> If I knew C and grib1, the second method were be better.
>>
>>
>>           Wesley
>>
>>
>>
>>
>>
>> Arlindo da Silva wrote:
>>> 2011/11/14 Дарья <darik777 at i.ua <mailto:darik777 at i.ua> 
>>> <mailto:darik777 at i.ua>>
>>>
>>>    According to wgrib .grb file created by  lats4d command has the
>>>    following structure
>>>
>>>    rec 1:0:date 2007081500 TMP kpds5=11 kpds6=1 kpds7=0 levels=(0,0)
>>>    grid=255 sfc anl:
>>>     TMP=Temp. [K]
>>>     timerange 0 P1 0 P2 0 TimeU 1  nx 209 ny 139 GDS grid 0
>>>    num_in_ave 0 missing
>>>    0
>>>     center 100 subcenter 2 process 13 Table 128
>>>     latlon: lat  37.788000 to 48.977000 by 0.081000  nxny 29051
>>>             long 21.610000 to 38.475000 by 0.081000, (209 x 139) scan
>>>    2 mode 128 bdsgrid 1
>>>     min/max data 271.97 300.67  num bits 9  BDS_Ref 2719.7  DecScale
>>>    1 BinScale 0
>>>
>>>    However, I need to change some parameters of the grb file:
>>>    "grid" (from 255 to 3)
>>>    "center" (from 100 to 7)
>>>    "subcenter" (from 2 to 0)
>>>     "process" (from 13 to 82)
>>>    "scan" (from 2 to 0)
>>>
>>>    Is there any way to do it by lats4d command?
>>>
>>>
>>> You can control some of the details of the grib-1 file with a lats
>>> parameter table, see the lats4d documentation (with "lats4d.sh -h").
>>> When a parameter table it is not specified, lats4d creates one for you
>>> on the fly. Look for file .grads.lats.table on the directory you ran
>>> lats4d from. Rename this file and edit it by hand. However, not
>>> everything can be customized this way.
>>>
>>> Wes, the resident GRIB wizard,  may be able to suggest some wgrib
>>> trick for doing this.
>>>
>>>     Arlindo
>>>
>>>
>>>
>>>
>>>
>>>
>>>    -- реклама 
>>> -----------------------------------------------------------
>>>    Акция в Книжном Клубе - Более 100 книг по 10 грн + книга в подарок!
>>>    http://www.bookclub.ua/catalog/join/?utm_source=iua&utm_medium=email 
>>> <http://www.bookclub.ua/catalog/join/?utm_source=iua&utm_medium=email>
>>>    <http://www.bookclub.ua/catalog/join/?utm_source=iua&utm_medium=email 
>>> <http://www.bookclub.ua/catalog/join/?utm_source=iua&utm_medium=email>>
>>>
>>>
>>>    _______________________________________________
>>>    gradsusr mailing list
>>>    gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org> 
>>> <mailto:gradsusr at gradsusr.org>
>>>    http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>>
>>>
>>>
>>> -- 
>>> Arlindo da Silva
>>> dasilva at alum.mit.edu <mailto:dasilva at alum.mit.edu> 
>>> <mailto:dasilva at alum.mit.edu>
>>> ------------------------------------------------------------------------
>>>
>>> _______________________________________________
>>> gradsusr mailing list
>>> gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
>>> http://gradsusr.org/mailman/listinfo/gradsusr
>>>
>>
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org <mailto:gradsusr at gradsusr.org>
>> http://gradsusr.org/mailman/listinfo/gradsusr
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org <mailto:jma at cola.iges.org>
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>