20010918: dcgrib decoding

Mike,

The grid navigation block cannot be read message seems to indicate:

1) The file previously created is corrupt

2) you were possibly out of disk space

To see if either of these is the case, check for 0 length files
in your $MODEL directory and/or remove the files creating the log messages.

Your comment that other grids are missing may indicate a disk space problem.

Steve Chiswell
Unidata User SUpport


>From: Mike Trexler <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200109181715.f8IHFT108264

>Hi Steve (presumably),
>
>I'm having trouble decoding model data into gempak.  We had "opened
>the flood gates" before and were receiving just about everything with
>something like:
>
>HDS|NMC2|NOGAPS ^(/u/ftp/gateway|[HOYZ]|US058).*
>        PIPE    /gemexe/dcgrib2 -d /data/realtime/gempak/logs/dcgrib.log
>
>        -e GEMTBL=/fs/measol0/pkg/nawips/gempak/tables
>
>
>Ok on Friday I changed to selectively get certain grids.  So now my
>pqact.conf looks just like the example (with appropriate tabs) like:
>
># NOAAport ETA grids
># Grid #211 80km CONUS:    ^[YZ].Q.*/mETA
># Grid #212 40km CONUS:    ^[YZ].R.*/mETA
># Grid #215 20km CONUS:    ^[YZ].U.*/mETA
># Grid #214 47.5km Alaska: ^[YZ].T.*/mETA
># Select any/all grids desired from [QRUT]
>HRS     ^[YZ].[QRU].*/mETA
>        PIPE    /gemexe/dcgrib2
>        -d /data/realtime/gempak/logs/dcgrib.log
>        -e GEMTBL=/fs/measol0/pkg/nawips/gempak/tables
>#
># NOAAport MRF grids
># Grid #201 N. Hemisphere 381km: ^Y.A... KWBH
># Grid #202 CONUS         190km: ^Y.I... KWBH
># Grid #203 Alaska        190km: ^Y.J... KWBH
># Grid #204 Hawaii        160km: ^Y.K... KWBH
># Grid #205 Puerto Rico   190km: ^Y.L... KWBH
># Select any/all grids desired from [AIJKL]
>HRS     ^Y.[I]... KWBH
>        PIPE    /gemexe/dcgrib2
>        -d /data/realtime/gempak/logs/dcgrib.log
>        -e GEMTBL=/fs/measol0/pkg/nawips/gempak/tables
>#
>#
># RUC/MAPS model output
># Grid #211 CONUS   80km: ^[YZ].Q.*/mRUC
># Currently, only grid #211
>HRS     ^[YZ].[Q].*/mRUC
>        PIPE    /gemexe/dcgrib2
>        -d /data/realtime/gempak/logs/dcgrib.log
>        -e GEMTBL=/fs/measol0/pkg/nawips/gempak/tables
>
>So, my problem is that ever since then some of the grids from
>most all the models come in with really strange values.  Others
>grids just come in missing.  Other grids seem fine.  In the log file
>I get errors like the following....
>
>6848] 010918/1237 [DC 3]  Starting up.
>[6789] 010918/1249 [GD -8]  Grid navigation block cannot be read.
>[6789] 010918/1249 [DCGRIB 1] Grid navigation 201 incompatible with file
>/data/realtime/gempak/model/2001091812_avn201.gem
>[6789] 010918/1249 [GD -8]  Grid navigation block cannot be read.
>[6789] 010918/1249 [DCGRIB 1] Grid navigation 213 incompatible with file
>/data/realtime/gempak/model/2001091812_avn213.gem
>[6848] 010918/1251 [DC 5]  Normal termination.
>[6848] 010918/1251 [DC 2]  Number of bulletins read and processed: 5
>
>This usually indicates a problem with the some reference table, right?
>What's confusing is that there's really nothing different between
>specifying
>the whole lot of models all together and specifying certain models.
>
>thanks for your help
>trex
>
>
>--
>__________________________________________________
>**************************************************
>******          C. Michael Trexler          ******
>******      N C State Univ. - Box 8208      ******
>******  Dept. of Mar/Earth/Atmos. Sciences  ******
>******        Research III   Rm. 100        ******
>******        Raleigh, NC 27695-8208        ******
>******        (919) 515-1447  Phone         ******
>******         (919) 515-1683  Fax          ******
>**************************************************
>--------------------------------------------------
>******        address@hidden         ******
>__________________________________________________
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>
>