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[GEMPAK #PAC-692158]: dcgrib2 decoding problem for soil moisture?

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  • Subject: [GEMPAK #PAC-692158]: dcgrib2 decoding problem for soil moisture?
  • Date: Tue, 10 May 2011 16:50:07 -0600
Hi Art,

Are you certain the depth is being rounded rather than scaled?  After decoding 
the linked file what I see are layer values (for DPTH vertical coordinate) 
expressed in tenths of meters.  Are you seeing the same or are the decoded 
layer values actually rounded (which would look like LEVL1 = 0, LEVL2 = 0 
rather than 0 and 10, respectively):

dcgrib2 soil.gem < nam.t00z.awphys06.grb2.tm00


 GEMPAK-GDINFO>
 GDFILE   = soil.gem
 LSTALL   = YES
 OUTPUT   = T
 GDATTIM  = all
 GLEVEL   = all
 GVCORD   = all
 GFUNC    = SOILL
 GEMPAK-GDINFO>

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
   12     110510/0000F006                          0  10     DPTH SOILL       
   17     110510/0000F006                        100  200    DPTH SOILL       
   20     110510/0000F006                         40  100    DPTH SOILL       
   23     110510/0000F006                         10  40     DPTH SOILL       


-Michael
-Unidata



> Hi...
> 
> We're trying to decode soil moisture in NCEP grib files and the decoder
> seems to be rounding the layer information to the nearest meter but the
> depths are in fractions of a meter.  We're using V10.3 of gempak to do
> this, so it's possible this could have been fixed in a more recent
> release, but I suspect not too many people are looking at soil moisture
> either.  An example NCEP file we decoded is:
> 
> http://www.ftp.ncep.noaa.gov/data/nccf/com/nam/prod/nam.20110510/nam.t00z.awphys06.grb2.tm00
> 
> with paramters:
> 
> 315:21944887:d=2011051000:SOILL:0-0.1 m below ground:6 hour fcst:
> 316:22047041:d=2011051000:SOILL:0.1-0.4 m below ground:6 hour fcst:
> 317:22151739:d=2011051000:SOILL:0.4-1 m below ground:6 hour fcst:
> 318:22256340:d=2011051000:SOILL:1-2 m below ground:6 hour fcst:
> 
> Thanks...
> 
> Art
> 
> Arthur A. Person
> Research Assistant, System Administrator
> Penn State Department of Meteorology
> email:  address@hidden, phone:  814-863-1563
> 
> 


Ticket Details
===================
Ticket ID: PAC-692158
Department: Support GEMPAK
Priority: Normal
Status: Open