20051030: Gempak - Trouble decoding NDFD sectors

John,

Using the ds.temp.bin from the URL below:

cat ds.temp.bin | dcgrib2 -d - YYYYMMDDHH_ndfd.gem

No table modifications necessary.

 Opening WMO Originating Center Table wmocenter.tbl...
 Opening WMO GRIB2 Parameter Table g2varswmo1.tbl...
 Opening WMO GRIB2 Vertical Coordinate Table g2vcrdwmo1.tbl...

Since the data is grib2, the tables used are the g2vars...and g2vcrd....
Since the data is TMPK which is a parameter number less than 192, the 
wmotable is the one that is used. If you aren't seeing the g2...tables
being used, then thats not right.

The resultant file:

 GRID FILE: 2005103117_ndfd.gem                                                 
                                

 GRID NAVIGATION: 
     PROJECTION:          LCC                 
     ANGLES:                25.0   -95.0    25.0
     GRID SIZE:          187 229
     LL CORNER:              38.70    -78.72
     UR CORNER:              47.09    -65.59

 GRID ANALYSIS BLOCK: 
      UNKNOWN ANALYSIS TYPE 

 Number of grids in file:    39

 Maximum number of grids in file:   5000

  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
    1     051031/1700F001                          0         NONE TMPK        
    2     051031/1700F004                          0         NONE TMPK        
    3     051031/1700F007                          0         NONE TMPK        
    4     051031/1700F010                          0         NONE TMPK        
    5     051031/1700F013                          0         NONE TMPK        
    6     051031/1700F016                          0         NONE TMPK        
    7     051031/1700F019                          0         NONE TMPK        
    8     051031/1700F022                          0         NONE TMPK        
    9     051031/1700F025                          0         NONE TMPK        
   10     051031/1700F028                          0         NONE TMPK        
   11     051031/1700F031                          0         NONE TMPK        
   12     051031/1700F034                          0         NONE TMPK        
   13     051031/1700F037                          0         NONE TMPK        
   14     051031/1700F040                          0         NONE TMPK        
   15     051031/1700F043                          0         NONE TMPK        
   16     051031/1700F046                          0         NONE TMPK        
   17     051031/1700F049                          0         NONE TMPK        
   18     051031/1700F052                          0         NONE TMPK        
   19     051031/1700F055                          0         NONE TMPK        
   20     051031/1700F058                          0         NONE TMPK        
   21     051031/1700F061                          0         NONE TMPK        
   22     051031/1700F064                          0         NONE TMPK        
   23     051031/1700F067                          0         NONE TMPK        
   24     051031/1700F070                          0         NONE TMPK        
   25     051031/1700F073                          0         NONE TMPK        
   26     051031/1700F076                          0         NONE TMPK        
   27     051031/1700F079                          0         NONE TMPK        
   28     051031/1700F085                          0         NONE TMPK        
   29     051031/1700F091                          0         NONE TMPK        
   30     051031/1700F097                          0         NONE TMPK        
   31     051031/1700F103                          0         NONE TMPK        
   32     051031/1700F109                          0         NONE TMPK        
   33     051031/1700F115                          0         NONE TMPK        
   34     051031/1700F121                          0         NONE TMPK        
   35     051031/1700F127                          0         NONE TMPK        
   36     051031/1700F133                          0         NONE TMPK        
   37     051031/1700F139                          0         NONE TMPK        
   38     051031/1700F145                          0         NONE TMPK
   39     051031/1700F151                          0         NONE TMPK

Steve Chiswell
Unidata User Support


>From: "John Meyers" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200510310349.j9V3nAIa013712

>Institution: Museum of Science, Boston MA
>Package Version: 5.8.3
>Operating System: RHEL4
>Hardware Information: x86_64
>Inquiry: We are trying to decode the NDFD regional sector data available at ht
> tp://weather.noaa.gov/pub/SL.us008001/ST.opnl/DF.gr2/DC.ndfd/AR.neast
>(does not appear to be available on IDD yet).
>
>First dcgrib could not find a parameter table, so I looked the PDS info made n
> wstggrib1.tbl.  Now the output of dcgrib2 is:
>[7689] 051030/2238[DECODE_GRIB2 0] replace Complex packing nbits -2147483647
>[7689] 051030/2238[DECODE_GRIB2 0] -9999.000000 -9999.000000 8
>[7689] 051030/2238[DECODE_GRIB2 0] TMPK  0:-1 NONE 0 0
>[7689] 051030/2238[DECODE_GRIB2 0] numfields 1 numlocal 0
>
>The parameter TMPK is correct but no grids are produced in the output file.
> Best,
>
>John
>
>
>
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