[gradsusr] How to create a time series in a grid point, using a series of GRIB files with only one time each

[Miquel Traveria]

Many thanks Jeff and Yaqiang,

first i followed the steps suggested by Jeff, I created the .ctl and .idx
and launched GrADS. I opened the file.ctl and displayed the TMP2m variable,
and GrADS issued an error:

Cannot contour grid - all undefined values.

If I then set the variables to one grid point and time, the TMP2m displayed
an odd value:

ga-> d tmpsfc
Result value = -9.99e+08

Is there any problem with my files? I attach the .ctl below

Many thanks in advance!

Miquel


dset ^gfs.t06z.mastergrb2f%f2
options template
index ^gfs.t06z.mastergrb2f03.idx
undef 9.999E+20
title gfs.t06z.mastergrb2f03
* produced by g2ctl v0.0.8.2
* command line options: gfs.t06z.mastergrb2f03
* griddef=1:0:(720 x 361):grid_template=0:winds(N/S): lat-lon grid:(720 x
361) units 1e-06 input WE:NS output WE:SN res 48 lat 90.000000 to
-90.000000 by 0.500000 lon 0.000000 to 359.500000 by 0.500000
#points=259920:winds(N/S)

dtype grib2
ydef 361 linear -90.000000 0.5
xdef 720 linear 0.000000 0.500000
tdef 9 linear 09Z08feb2012 3hr
zdef 1 linear 1 1
vars 6
GUSTsfc   0,1,0   0,2,22 ** surface Wind Speed (Gust) [m/s]
PRATEsfc   0,1,0   0,1,7,0 ** surface Precipitation Rate [kg/m^2/s]
TMPsfc   0,1,0   0,0,0 ** surface Temperature [K]
TMP2m   0,103,2   0,0,0 ** 2 m above ground Temperature [K]
UGRD10m   0,103,10   0,2,2 ** 10 m above ground U-Component of Wind [m/s]
VGRD10m   0,103,10   0,2,3 ** 10 m above ground V-Component of Wind [m/s]
ENDVARS

2012/2/8 Yaqiang Wang <yaqiang.wang at gmail.com>

> Grib file is composed of independent messages, so the concatenating
> method is quite easy.
>
> Windows: copy /b file1.grib+file2.grib newfile.grib
>
> Linux: cat file1.grib file2.grib > newfile.grib
>
> On Wed, Feb 8, 2012 at 2:43 AM, Jeff Duda <jeffduda319 at gmail.com> wrote:
> > You don't need to go through the mess of concatenating GRIB files.  Just
> > write a control file for one of the GRIB files and use templates over
> time
> > to tell Grads to open several files at once.  You'll have to adjust your
> > TDEF line as well, then use the gribmap utility to create an index file
> for
> > the template control file you made.
> >
> > Jeff Duda
> >
> > On Tue, Feb 7, 2012 at 12:24 PM, Miquel Traveria <traveria at gmail.com>
> wrote:
> >>
> >> Hello all,
> >>
> >> I want to create (display) a time series of temperature at one grid
> point.
> >> I downloaded 8 consecutive GRIB files with the Temperature over an
> area, and
> >> I want to  concatenate all the files in a sigle file to use GRADS to
> display
> >> the time series over one node. How can I concatenate the files?
> >>
> >> Or there is another possibility in GRADS to load the 8 files and
> display a
> >> time series in a node?
> >>
> >> Any help will be very welcome!
> >>
> >> Sincerely,
> >>
> >> Miquel
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> gradsusr mailing list
> >> gradsusr at gradsusr.org
> >> http://gradsusr.org/mailman/listinfo/gradsusr
> >>
> >
> >
> >
> > --
> > Jeff Duda
> > Graduate research assistant
> > University of Oklahoma School of Meteorology
> > Center for Analysis and Prediction of Storms
> >
> >
> > _______________________________________________
> > gradsusr mailing list
> > gradsusr at gradsusr.org
> > http://gradsusr.org/mailman/listinfo/gradsusr
> >
>
>
>
> --
> *************************************************
> Dr. Yaqiang Wang
> Chinese Academy of Meteorological Sciences (CAMS)
> 46, Zhong-Guan-Cun South Avenue
> Beijing, 100081
> China
>
> yaqiang.wang at gmail.com
>
> http://www.meteothinker.com
> **************************************************
>
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>
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