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19990914: gdedit / METAR reports

>From: Chris Hennon <address@hidden>
>Organization: .
>Keywords: 199909151708.LAA09697

>
>On Tue, 14 Sep 1999, Unidata Support wrote:
>
>> 
>> 2) For NWX to list raw metar bulletins (eg the ascii format), you need
>> to be pointing to data files you just FILE from the LDM. NWX uses the
>> ascii data, and not the gempak files that dchrly is converting into GEMPAK
>> format for use in the surface programs. The nwx interface just gives you 
>> a point and click lookup into the text file...it does not use the
>> decoded files. It will pull up the entire bulletin that the station
>> exists in.
>> 
>> You can use SFLIST with SFPARM=TEXT;SPCL to list the raw individual
>> reports from a decoded Gempak surface file.
>
>OK.  So, the procedure would be to run SFLIST, dumping the METAR reports
>to a file (like "99091515.wmo"), then running nwx to display the stations
>from that file?  

No...if you want to look at the bulletins in NWX, you would use the LDM FILE 
action 
in pqact.conf to store the raw metar bulletins in a file like:
DDS|IDS ^S[AP].... .... ([0-3][0-9])([0-2][0-9])
        FILE    data/surface/sao/(\1:yyyy)(\1:mm)\1\2_sao.wmo

Then you would define RAW_SAO in the Gemenviron script to point to
the data directory that files are being written in to. The wmo extension
in the master.tbl line you show below tells nwx to use files with that in their
name in the $RAW_SAO directory (you should not have gempak format files in that
directory with the "wmo" string in their names). The metar.stn table is the
list of stations that will be plotted as diamonds on the map to click on.

I mentioned that the reports are available from sflist as an alternative
for pulling up the METAR report of the decoded obs.

Steve Chiswell
Unidata User Support


>Could you send along an example of your METAR files and
>the entry in your master.tbl file?  I'm still having a
>configuration/understanding problem.  nwx is still not finding any
>reports when you click on a station, even though I checked that they are
>in the file.  It is either not finding the file or not finding any
>stations.  My master.tbl entry looks like this:
>
>OBS_METAR    metar.stn    M $RAW_SAO                                 wmo
>
>and my filename is "99091515.wmo".  This file contains all of the METAR
>reports.  Thanks.
>
>Chris  
>
>
>
>
>
>> 
>> 
>> >From: Chris Hennon <address@hidden>
>> >Organization: .
>> >Keywords: 199909142025.OAA09177
>> 
>> >Steve -
>> >
>> >I have a couple of questions.
>> >
>> >1)  I'm working with gdcfil and gdedit to create a grid I can display in
>> >gempak.  When I run gdinfo for my grid file, it looks like this:
>> >**********
>> >
>> > GEMPAK-GDINFO>r
>> >
>> > GRID FILE: simple.grd                                                     
>    
>> >       
>> >
>> > GRID NAVIGATION: 
>> >     PROJECTION:          CED                 
>> >     GRID SIZE:            5   5
>> >     LL CORNER:              30.00    -80.00
>> >     UR CORNER:              40.00    -70.00
>> >
>> > GRID ANALYSIS BLOCK: 
>> >     ANALYSIS TYPE:        BARNES
>> >     DELTAN:               5.000
>> >     DELTAX:           -9999.000
>> >     DELTAY:           -9999.000
>> >     GRID AREA:            29.00  -81.00   41.00  -69.00
>> >     EXTEND AREA:          24.00  -86.00   46.00  -64.00
>> >     DATA AREA:            24.00  -86.00   46.00  -64.00
>> >
>> > Number of grids in file:     1
>> >
>> > Maximum number of grids in file:    200
>> >
>> >  NUM       TIME1              TIME2           LEVL1 LEVL2  VCORD PARM
>> >    1     990913/0000                           1000         PRES TMPC     
>    
>> > Parameters requested: GDFILE,LSTALL,OUTPUT.
>> >
>> >**********
>> >My ascii data file which I added to the grid looks like this:
>> >**********
>> >
>> >Grid file: simple.grd
>> >GRID:    TIME1   TIME2   LEVEL1   LEVEL2 VCORD  PARM
>> >     990913/0000          1000            PRES  TMPC
>> >AREA:   DSET             GRID SIZE:    5   5
>> >COLUMNS: 1    5     ROWS: 1   5
>> >
>> >Scale factor: 10**0
>> >
>> >  COLUMN:        1       2       3       4       5
>> >ROW  5         10.23   11.34    10.67   8.54   9.33
>> >ROW  4          8.56   10.20    10.88   9.87   8.33
>> >ROW  3         10.22    9.98    11.29  10.59   9.34
>> >ROW  2          6.54    7.43    10.04  10.47   9.68
>> >ROW  1          5.89    6.65     9.32   9.03   8.76
>> >
>> >**********
>> >Now, when I run gdlist using the following inputs:
>> >**********
>> >
>> > GDATTIM   Grid date/time                    LAST
>> > GLEVEL    Grid level                        1000
>> > GVCORD    Grid vertical coordinate          PRES
>> > GFUNC     Scalar grid                       TMPC
>> > GDFILE    Grid file                         simple.grd
>> > GAREA     Graphics area                     30;-80;40;-70
>> > PROJ      Map projection/angles/margins|dr  CED
>> > SCALE     Scalar scale / vector scale       
>> > OUTPUT    Output device/filename            T
>> > Parameters requested:
>> >GDATTIM,GLEVEL,GVCORD,GFUNC,GDFILE,GAREA,PROJ,SCALE,
>> > OUTPUT.
>> > GEMPAK-GDLIST> r
>> >
>> >**********
>> >It spits back a scale factor of 10** 1, even though I explicitly specified
>> >the scale factor of 10** 0.
>> >**********
>> >
>> > GDLIST PARAMETERS: 
>> >
>> > Grid file: simple.grd                                                     
>    
>> >       
>> > GRID IDENTIFIER:
>> >    TIME1             TIME2         LEVL1 LEVL2   VCORD PARM
>> >990913/0000                          1000          PRES TMPC        
>> >
>> > GAREA:    30;-80;40;-70                                   
>> > SCALE FACTOR : 10** 1
>> > OUTPUT:    TERM/              
>> >
>> > MINIMUM AND MAXIMUM VALUES    58.90   113.40
>> >
>> >**********
>> >Hence my values are all 10 times too high.  What am I missing?
>> >
>> >2)  I am trying to display METAR reports in "nwx".  No data is ever found.
>> >The entry in the tables/nwx/master.tbl file for METAR reports is:
>> >
>> >OBS_METAR    metar.stn    R $RAW_SAO                                 gem
>> >
>> >where $RAW_SAO is /usr/local/ldm/data/surface.  Within that directory are
>> >the sao files (yyyymmdd_sao.gem).  Are these the files that nwx should be
>> >looking for for METAR reports?  Or is there something else I should be
>> >looking for or doing?  When a station is clicked on the nwx map, a message
>> >such as "No data available for KCLE" is given in the text window.
>> >
>> >As always, thanks for you help.
>> >
>> >Chris  
>> >
>> >================================================
>> >| Chris Hennon             Ohio State University   |
>> >| Tropical Meteorology      address@hidden   |
>> >|                                              |
>> >| Dept of Geography   Office: 1174 Derby Hall  |
>> >| 1036 Derby Hall     Phone : (614) 292-7518   |
>> >| Columbus, OH 43210  Fax   : (614) 292-6213   |
>> >================================================
>> >
>> 
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>