question about ctl file using wgrib2

[Jennifer Adams]

Grib2 variables that are statistically processed (SP) can be
displayed by GrADS, you just need to put the SP code in the units
field of the variable declaration (i.e. disc,cat,num,sp). The output
from g2ctl does not include the SP (yet -- Wesley is obviously
working on that.) However, there are other ways to find out what the
SP code is -- grib2scan output will tell you:
    ... Parameter: disc,cat,num,sp = 0,1,196,0 ...
and if you run gribmap in verbose mode (with the -v option) then it
will spew the grib codes:
     ... lev1=1,0 var=0,1,196,0 ...

If the grib2 field has a statitsical process indicator, it is
required in the descriptor file, otherwise gribmap will not match the
field and your display will be 'undefined'.

Jennifer



On Feb 21, 2008, at 10:09 AM, Wesley Ebisuzaki wrote:

> Dear Amelia,
>
>     Grib2 has a statistical processing indicator that tells whether
> the
> data is an average, accumulation,
> min, max, rms, std dev, etc. (code table 4.10).  The "none" indicates
> that there was no statistical
> processing done. Someday g2ctl will support this indicator, and one
> would be able to plot the
>
>   tmp_max
>   tmp_min
>   tmp_rms
>
> as separate variables.
>
>      Wesley Ebisuzaki
>
>
> amelia graziano wrote:
>> Hello, hope someone can help! After I generate a ctl file using
>> wgrib2
>> I get a strange word "none" e.g.:
>>
>> ./g2ctl -0 gfs.t00z.pgrbf00.grib2 > example4.ctl
>>
>> all the lines in example4.ctl shows "none"
>>
>> HGTprs   26,100      0,3,5 ** (profile) none Geopotential Height
>> [gpm]
>> O3MR30mb  0,100,3000   0,14,192 ** 30 mb none Ozone Mixing Ratio
>> [kg/kg]
>> PRMSLmsl  0,101,0   0,3,1 ** mean sea level none Pressure Reduced to
>> MSL [Pa]
>>
>> What is that "none"
>>
>> Thaks a lot
>>
>> Amelia

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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