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20000309: dcgrib: Invalid center id/grid id combination

Neil,

You have several different model projection here. A Gempak grid file
can only have one grid projection, so your errors are from trying to
write a grid to a file that doesn't match the same grid.

Below from your log messages, you see:
Grid ID  213
Grid ID  202
Grid ID  211
etc.

These are denoted by the third letter in the wmo header H, I, Q, eg:
Y.H
Y.I
Y.Q
etc.

The tutorial examples for the AVN shows the various sectors that
are currently carried on NOAAport. See:
http://www.unidata.ucar.edu/packages/gempak/tutorial/pqact/decoders.tbl

#
# AVN model output 
# Grid #201 N. Hemisphere 381km: ^Y.A... KWBC.*(/mAVN|/mSSIAVN)
# Grid #202 CONUS         190km: ^Y.I... KWBC.*(/mAVN|/mSSIAVN)
# Grid #203 Alaska        190km: ^Y.J... KWBC.*(/mAVN|/mSSIAVN)
# Grid #211 CONUS          80km: ^Y.Q... KWBC.*(/mAVN|/mSSIAVN)
# Grid #213 CONUS          95km: ^Y.H... KWBC.*(/mAVN|/mSSIAVN)
# Select any/all grids desired from [QAIJH]
HRS     ^[YZ].[QAIJH]... KWB. ([0-3][0-9])([0-2][0-9]).*(/mAVN|/mSSIAVN)
        PIPE    /usr/local/ldm/decoders/dcgrib -d data/gempak/logs/dcgrib.log
                -g /home/gempak/NAWIPS-5.4/gempak5.4/tables 
                PACK data/gempak/hds/YYYYMMDDHH_avn@@@.gem

This pqact.conf example will capture all of the grids referenced in the comments
above. Since these grids all have different grid projection, they have to be 
written to
different files. The @@@ template in the file name will be replaced with the 
grid number
sown above. This allows you to use a single pqact.conf action for all these 
grids.
If you do not need all three of the CONUS sectors, you could choose not to
receive the 202 and 213 grids by removing the letters H & I from the pqact.conf 
pattern,
eg: ^[YZ].[QAJ] etc.


The reason the NWS broadcasts all these different grids is that AWIPS doesn't 
reproject
the grid based on a user choice of projection like GEMPAK can. Gempak can make 
do with 
a single grid. Instead, AWIPS uses a different grid for each type of display.

One other AVN grid dataset you can obtain is the Global thinned grids. 
# Global AVN (Spectral) Thinned grids
# Grid octets I-P will be stitched togethir as a single global grid
#
HRS     ^H.[I-P]... KWB. ([0-3][0-9])([0-2][0-9]).*
        PIPE    /usr/local/ldm/decoders/dcgrib -d data/gempak/logs/dcgrib.log
                -g /home/gempak/NAWIPS-5.4/gempak5.4/tables
                -q"lin,dlat=2.5,dlon=2.5"
                PACK data/gempak/hds/YYYYMMDDHH_thin.gem


The thinned grids are broadcast using 8 individual octects to cover the globe.
These grids can be stitched together to form a single global grid using the 
above
pattern. The -q option specifies the grid dx & dy that the resultant grid will 
have.


Steve Chiswell
Unidata User Support


>From: "Neil R. Smith" <address@hidden>
>Organization: Dept. Atmospheric Science, TAMU
>Keywords: 200003091742.KAA17952

>Hi folks,
>
>I'm getting these dcgrib errors with the AVN global spectral model:
>.
>.
>Mar 09 17:30:14 3Q:coriolis dcgrib[8714]: YTHI25 KWBC 091200 skipped
>1000309/1200 Grid ID  213  11 100   0 250
>Mar 09 17:30:14 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         202          48
>Mar 09 17:30:14 3Q:coriolis dcgrib[8714]: YTII20 KWBC 091200 skipped
>1000309/1200 Grid ID  202  11 100   0 200
>Mar 09 17:30:14 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         202          48
>Mar 09 17:30:14 3Q:coriolis dcgrib[8714]: YTII25 KWBC 091200 skipped
>1000309/1200 Grid ID  202  11 100   0 250
>Mar 09 17:30:15 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         211          28
>Mar 09 17:30:15 3Q:coriolis dcgrib[8714]: YTQI15 KWBC 091200 skipped
>1000309/1200 Grid ID  211  11 100   0 150
>Mar 09 17:30:16 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         211          28
>Mar 09 17:30:16 3Q:coriolis dcgrib[8714]: YTQI20 KWBC 091200 skipped
>1000309/1200 Grid ID  211  11 100   0 200
>Mar 09 17:30:20 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         213          52
>Mar 09 17:30:20 3Q:coriolis dcgrib[8714]: YTHI20 KWBC 091200 skipped
>1000309/1200 Grid ID  213  11 100   0 200
>Mar 09 17:30:20 5Q:coriolis dcgrib[8714]: Invalid center id/grid id
>combination:           7         202          48
>.
>.
>ldm is 5.0.6
>Is this a table error?
>Thanks, -neil
>-- 
>Neil R. Smith, Comp. Sys. Mngr.                address@hidden
>Dept. Atmospheric Sci., Texas A&M Univ.        979/845-6272 FAX:979/862-4466
>