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[IDV #JZE-750046]: DWD (German Wx Service) GRIB Tables in IDV

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  • Subject: [IDV #JZE-750046]: DWD (German Wx Service) GRIB Tables in IDV
  • Date: Tue, 07 Jul 2009 14:11:18 -0600
Hi Bill-
 
> We are working with some German GRIB files and we are trying to work with 
> them in IDV.  We've had success with working with GRIB data from MeteoFrance 
> with their GRIB data following the IDV instructions for installing new grib 
> tables
> 
> http://www.unidata.ucar.edu/software/idv/docs/userguide/data/GribTables.html
> 
> But we having trouble with the DWD/German Grib data...
> From WGRIB the test file we were sent returns
> 
> rec 1:8:date 2009070700 WW kpds5=99 kpds6=1 kpds7=0 levels=(0,0) grid=255 sfc 
> 132hr fcst:
> WW=Wetter (verschluesselt nach ww-Tabelle
> timerange 0 P1 132 P2 0 TimeU 1  nx 720 ny 361 GDS grid 0 num_in_ave 0 
> missing 0
> center 78 subcenter 255 process 174 Table 203 scan: WE:NS winds(N/S)
> latlon: lat  90.000000 to -90.000000 by 0.500000  nxny 259920
> long 0.000000 to -0.500000 by 0.500000, (720 x 361) scan 0 mode 128 bdsgrid 1
> min/max data 0 96  num bits 16  BDS_Ref 0  DecScale 0 BinScale -9
> 
> so we set the grib1lookuptable.lst file to read
> 
> 78:   255:      1:      /accounts/wcapehar/IDV/dwd_203.tab

Try:

78:   -1:      203:      /accounts/wcapehar/IDV/dwd_203.tab


If that doesn't work, please upload a sample file and the table to:

http://motherlode.ucar.edu/repository/alias/idvupload

and i'll take a look further.

Don Murray

> and the partial dwd_203.tab (which is a little weird, it looks like they're 
> trying to encode metars & sypoptic reports) is
> 
> -1:78:-1:203
> 0:var0:undefined
> 1:PRES:Pressure [Pa]
> 2:GPTZ:Geopotential Height [dam]
> 4:TMP:Temperature [C]
> 5:DEWP:Dew Point Temperature [C]
> 6:UUVV:Coded Winds by U V [(X*100000 + ((Y*10)+5000)) m s-1]
> 7:DIST_K:Geometric Height [1000 ft]
> 8:DIST_H:Geometric Height [100 ft]
> 9:SPDDIR:Coded Winds by SPD DIR [(dd*1000 + ff) deg kt]
> 10:PTEND:Pressure tendency [Pa/3hr]
> 99:WW:Significant Weather []
> 
> Field 99 (Significant Weather) is the only data in the test file)
> 
> When we run this through IDV, it calls it field 99 "snowmelt" in accordance 
> w/ the WMO table, as I understand it as if the file is  not even being tapped.
> 
> is there anything we have overlooked here?  The (the "version" or 
> "subscenter" for example?)


Ticket Details
===================
Ticket ID: JZE-750046
Department: Support IDV
Priority: Normal
Status: Open