[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

20020215: Decode AVN data in McIDAS-XCD (cont.)

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: 20020215: Decode AVN data in McIDAS-XCD (cont.)
  • Date: Sat, 16 Feb 2002 16:59:06 -0700
>From: Eirh-Yu Hsie <address@hidden>
>Organization: Aeronomy Laboratory/NOAA/DOC
>Keywords: 200202141802.g1EI2kx04733 McIDAS-XCD AVN

Hsie,

>The DMGRID is already active:
>cumulus:[43]% decinfo.k LIST
>
 ...
>
>Processing Data Monitor: DMGRID       is active
>=========================================================================
>Decoder       Status      Configuration File
>----------------------------------------------------------------------
>GRIB          Active      GRIBDEC.CFG
>
 ...
>decinfo.k: Done

OK, this looks good.

>The NOGRIB.CFG is from distribution.  
>
>...
>#83  |-1  | -1 | -1 | -1 | -1 | -1  | -1 | -1 | -1 | -1
>#86  |-1  | -1 | -1 | -1 | -1 | -1  | -1 | -1 | -1 | -1
>#89  |-1  | -1 | -1 | -1 | -1 | -1  | -1 | -1 | -1 | -1
>84   |-1  | -1 | -1 | -1 | 207| 207 | -1 | -1 | -1 | -1
>#77  |-1  | -1 | -1 | -1 | 37 | 44    | -1 | -1 | -1 | -1
>#78  |-1  | -1 | -1 | -1 | 37 | 44    | -1 | -1 | -1 | -1
>#39  |-1  | -1 | -1 | -1 | -1 | -1  | -1 | -1 | -1 | -1
>#64  |-1  | -1 | -1 | -1 | -1 | -1  | -1 | -1 | -1 | -1
>...
>...
>It supposes to decode AVN thin grid data (#77.....).

- aside - The AVN thinned grids currently appear to be coming in from
process/model 81 or 96 (not 77).

OK, the copy of NOGRIB.CFG that goes out in the Unidata McIDAS-X
distribution does not turn off all AVN grids, but it does turn off
some:

81  |-1  | -1 | -1 | -1 | 203 | 203 | -1 | -1 | -1 | -1
96  |-1  | -1 | -1 | -1 | 203 | 203 | -1 | -1 | -1 | -1
96  |-1  | -1 | -1 | -1 | 211 | 211 | -1 | -1 | -1 | -1


re: request line from ~ldm/ldmd.conf

>I request everything from cirrus.al.noaa.gov:
>
>exec    "xcd_run MONITOR"
>#exec   "pqexpire"
>exec    "pqbinstats"
>exec    "pqact"
>#exec   "pqact -p (^[9A-OQ-X])|(^[YZ].[^AHIJRU])"
>#exec   "pqsurf"
>
>#
># LDM5 servers we ask for data
>#
>#       request <feedset> <pattern> <hostname pattern>
>#
>
>request ANY
>        ".*"
>        cirrus.al.noaa.gov
>
>request NIMAGE
>        ".*"
>        motherlode.ucar.edu

Assuming that cirrus gets everything, this will not be the cause of the
problem.  Taking the liberty to use my logon to cirrus, I see that
cirrus is requesting everything from its upstream feed:

request WMO|FSL2
        ".*"
        motherlode.ucar.edu

>I still need your help on this.

I also learned that cirrus forwards HRS data to cumulus.  So, I logged
onto cumulus and started to look around.  What I found was that cumulus
_is_ decoding the AVN data, and it is accessible both on cumulus and on
stratus (the ADDE server that is known outside of CIRES).

<as 'mcidas' on cumulus>
cd solaris/workdata
grdlist.k RTGRIDS/AVN FORM=FILE ALL
 Dataset Position  Creation Date Max Grids         Directory Title
 ----------------  ------------- --------- -------------------------------
        7             2002047       5000   ALL  00Z AVN 0  HR<=VT<=24 HR
       17             2002047       5000   ALL  00Z AVN 24 HR< VT<=48 HR
       27             2002047       5000   ALL  00Z AVN 48 HR< VT<=72 HR
       37             2002047       5000   ALL  00Z AVN 72 HR< VT<=96 HR
       47             2002047       5000   ALL  00Z AVN 96 HR< VT<=120HR
       57             2002047       5000   ALL  06Z AVN 0  HR<=VT<=24 HR
       67             2002047       5000   ALL  06Z AVN 24 HR< VT<=48 HR
       77             2002047       5000   ALL  06Z AVN 48 HR< VT<=72 HR
      107             2002047       5000   ALL  12Z AVN 0  HR<=VT<=24 HR
      117             2002047       5000   ALL  12Z AVN 24 HR< VT<=48 HR
      127             2002047       5000   ALL  12Z AVN 48 HR< VT<=72 HR
      137             2002047       5000   ALL  12Z AVN 72 HR< VT<=96 HR
      147             2002047       5000   ALL  12Z AVN 96 HR< VT<=120HR
      157             2002047       5000   ALL  18Z AVN 0  HR<=VT<=24 HR
      167             2002047       5000   ALL  18Z AVN 24 HR< VT<=48 HR
      177             2002047       5000   ALL  18Z AVN 48 HR< VT<=72 HR
GRDLIST - done

Given that cumulus is your decoding machine, and given that all of the
AVN data (not denied by NOGRIB.CFG) is being decoded on cumulus, I am 
unaware of where the problem is.

The clue to the problem, however, may lie in the first sentence of
your original email:

>I need some help to turn on the decoder for AVN model:
>
>RTGRIDS/AVN              GRID  GRID 5401-5500     Y  Real-Time AVN Grids

This shows an ADDE setup for AVN data in GRID files 5401 - 5500.  The
decoding of AVN was changed to start at GRID 5701 when the AVN model
output was increased to 4 times a day some time ago.  This was
accomplished by a modification in RTMODELS.CFG (located on your system
in the /home/mcidas/solaris/workdata directory):

...

SCRATCH=5001
NGM=  3 5051 120000 240000 480000
MRF=  1 5101 120000 240000 960000
MAPS= 0 5201 30000
MDR=  2 5301
AVN=  3 5701  60000 240000 1200000
ETA=  3 5501  60000 240000 720000

Given all of this, I am guessing that you were working on a machine
that had an old ADDE setup for serving the AVN GRIDs (one that does not
match the setup on cumulus/cirrus/stratus).  Since the GRID file range
had been changed, the setup would no longer point to current GRID files.

Please let me know if I have misinterpreted anything.

Tom