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20050513: Null fields in GEMPAK?





On Wed, 12 May 2004, Charley Knoderer wrote:

> I'm not sure what happened overnight, but the gem file appears to be
> okay.  However, when I try to plot the data in nmap2 or using sfmap, it
> only plots the data for those stations with values for the first
> parameter, that being PMFN.  If there's a -9999 for PMFN, nothing is
> plotted, even if there's data for the other parameters.  Is this normal?

No, that should only be the case if your SFPARM specified a qualifier,
such as SFPARM=PMFM>0;etc
In this case, only the stations that met the qualification would be plotted.
Otherwise, you probably still have a configuration problem.

If you would provide the sflist output and your NMAP2 prmlst.tbl entry
we can see what is happening.

Note on your SFEDIT use of SFPRMF, you can put max:min:resolution
specifiers so that values like -999 arerecognized as missing.

Steve Chiswell
Unidata User Support


>
> -Charley
>
> Charley Knoderer
> Meteorologist 1
> Sonoma Technology, Inc.
> 1360 Redwood Way, Suite C
> Petaluma, CA  94954
> (707) 665-9900
> FAX: (707) 665-9800
> www.sonomatech.com
>
>
> -----Original Message-----
> From: Charley Knoderer
> Sent: Tuesday, May 11, 2004 5:45 PM
> To: address@hidden
> Subject: RE: Null fields in GEMPAK?
>
>
> I changed the AirQ.dat file from -999 to -9999 for missing data.
> Interestingly, when I run sflist on the resulting gem file, the OZON
> field is not in the file.  Any ideas?
>
> -Charley
>
> Charley Knoderer
> Meteorologist 1
> Sonoma Technology, Inc.
> 1360 Redwood Way, Suite C
> Petaluma, CA  94954
> (707) 665-9900
> FAX: (707) 665-9800
> www.sonomatech.com
>
>
> -----Original Message-----
> From: Michael Brennan [mailto:address@hidden]
> Sent: Tuesday, May 11, 2004 5:07 PM
> To: Charley Knoderer
> Subject: Re: Null fields in GEMPAK?
>
>
> Hi Charley,
>
> I think the default GEMPAK value for a missing parameter is -9999.  You
> were close!
>
> Mike
> --
> Michael J. Brennan
> Graduate Research Assistant
> Department of Marine, Earth and Atmospheric Sciences
> North Carolina State University
> Email: address@hidden
> Phone: (919) 515-1447
>
>
>
> Charley Knoderer wrote:
> > Hi,
> >
> > I am trying to read data from a text file into sfcfil and sfedit.  The
>
> > issue I am coming across is how to deal with dasta that is not
> available
> > for a particular parameter at a particular site.  I tried using -999,
> as
> > shown below, but when the -999 is shown for the first parameter, it
> > seems to be unable to load any of the other parameters.  I am trying
> to
> > create a gem surface file to view the text data in nmap2.  Does anyone
>
> > have any ideas?  Is there a character or number I can use in the dat
> > file when data are unavailable?
> >
> > Below is the text file I am trying to read with sfcfil and sfedit as
> > follows:
> >
> > sfcfil << SFCFIL_EOF
> >
> > SFOUTF = $TMPGEMFILE
> > SFPRMF = PMFN;PM10;OZON;COxx;NO2x
> > STNFIL = /home/gempak/nawips5.6j/gempak/tables/stns/airqstations.tbl
> > SHIPFL = NO
> > TIMSTN = 24/2000
> > r
> >
> > exit
> >
> > SFCFIL_EOF
> > gpend
> > sfedit << SFEDIT_EOF
> >
> > SFEFIL = /tmp/airq/AirQ.dat
> > SFFILE = $TMPGEMFILE
> > r
> >
> > exit
> >
> > SFEDIT_EOF
> > gpend
> >
> >
> > #AirQ.dat file:
> >
> > PARM = PMFN;PM10;OZON;COxx;NO2x
> >
> > STID     DATTIM       PMFN   PM10   OZON   COxx   NO2x
> > A0000001 040511/0000  -999   -999   17     -999   -999
> > A0000001 040511/0100  -999   -999   28     -999   -999
> > A0000001 040511/0200  -999   -999   29     -999   -999
> > A0000001 040511/0300  -999   -999   21     -999   -999
> > A0000001 040511/0400  -999   -999   21     -999   -999
> > A0000001 040511/0500  -999   -999   21     -999   -999
> > A0000001 040511/0600  -999   -999   21     -999   -999
> > A0000001 040511/0700  -999   -999   21     -999   -999
> > A0000001 040511/0800  -999   -999   21     -999   -999
> > A0000001 040511/0900  -999   -999   21     -999   -999
> > A0000001 040511/1000  -999   -999   21     -999   -999
> > A0000001 040511/1100  -999   -999   21     -999   -999
> > A0000001 040511/1200  -999   -999   18     -999   -999
> > A0000001 040511/1300  -999   -999   26     -999   -999
> > A0000001 040511/1400  -999   -999   27     -999   -999
> > A0000001 040511/1500  -999   -999   27     -999   -999
> > A0000001 040511/1600  -999   -999   27     -999   -999
> > A0000001 040511/1700  -999   -999   27     -999   -999
> > A0000001 040511/1800  -999   -999   27     -999   -999
> > A0000001 040511/1900  -999   -999   27     -999   -999
> > A0000001 040511/2000  -999   -999   30     -999   -999
> > A0000003 040511/0000  -999   -999   33     -999   -999
> > A0000003 040511/0100  -999   -999   37     -999   -999
> > A0000003 040511/0200  -999   -999   38     -999   -999
> > A0000003 040511/0300  -999   -999   39     -999   -999
> > A0000003 040511/0400  -999   -999   39     -999   -999
> > A0000003 040511/0500  -999   -999   37     -999   -999
> > A0000003 040511/0600  -999   -999   36     -999   -999
> > A0000003 040511/0700  -999   -999   36     -999   -999
> > A0000003 040511/0800  -999   -999   35     -999   -999
> > A0000003 040511/0900  -999   -999   34     -999   -999
> > A0000003 040511/1000  -999   -999   33     -999   -999
> > A0000003 040511/1100  -999   -999   37     -999   -999
> > A0000003 040511/1200  -999   -999   36     -999   -999
> > A0000003 040511/1300  -999   -999   37     -999   -999
> > A0000003 040511/1400  -999   -999   35     -999   -999
> > A0000003 040511/1500  -999   -999   32     -999   -999
> > A0000003 040511/1600  -999   -999   28     -999   -999
> > A0000003 040511/1700  -999   -999   34     -999   -999
> > A0000003 040511/1800  -999   -999   33     -999   -999
> > A0000003 040511/1900  -999   -999   31     -999   -999
> > A0000003 040511/2000  -999   -999   29     -999   -999
> > A0000003 040511/2100  -999   -999   29     -999   -999
> > A0000005 040511/0000  -999   -999   41     -999   -999
> > A0000005 040511/0100  -999   -999   41     -999   -999
> > A0000005 040511/0200  -999   -999   40     -999   -999
> > A0000005 040511/0300  -999   -999   38     -999   -999
> > A0000005 040511/0400  -999   -999   38     -999   -999
> > A0000005 040511/0500  -999   -999   37     -999   -999
> > A0000005 040511/0600  -999   -999   35     -999   -999
> > A0000005 040511/0700  -999   -999   34     -999   -999
> > A0000005 040511/0800  -999   -999   31     -999   -999
> > A0000005 040511/0900  -999   -999   35     -999   -999
> > A0000005 040511/1000  -999   -999   40     -999   -999
> > A0000005 040511/1100  -999   -999   39     -999   -999
> > A0000005 040511/1200  -999   -999   38     -999   -999
> > A0000005 040511/1300  -999   -999   35     -999   -999
> > A0000005 040511/1400  -999   -999   33     -999   -999
> > A0000005 040511/1500  -999   -999   34     -999   -999
> > A0000005 040511/1600  -999   -999   34     -999   -999
> > A0000005 040511/1700  -999   -999   34     -999   -999
> > A0000005 040511/1800  -999   -999   33     -999   -999
> > A0000005 040511/1900  -999   -999   32     -999   -999
> > A0000005 040511/2000  -999   -999   31     -999   -999
> > A0000005 040511/2100  -999   -999   32     -999   -999
> > A0000007 040511/0000  -999   -999   26     -999   -999
> > A0000007 040511/0100  -999   -999   24     -999   -999
> > A0000007 040511/0200  -999   -999   28     -999   -999
> > A0000007 040511/0300  -999   -999   29     -999   -999
> > A0000007 040511/0400  -999   -999   32     -999   -999
> > A0000007 040511/0500  -999   -999   31     -999   -999
> > A0000007 040511/0600  -999   -999   30     -999   -999
> > A0000007 040511/0700  -999   -999   26     -999   -999
> > A0000007 040511/0800  -999   -999   26     -999   -999
> > A0000007 040511/0900  -999   -999   21     -999   -999
> > A0000007 040511/1000  -999   -999   17     -999   -999
> > A0000007 040511/1100  -999   -999   17     -999   -999
> > A0000007 040511/1200  -999   -999   20     -999   -999
> > A0000007 040511/1300  -999   -999   23     -999   -999
> > A0000007 040511/1400  -999   -999   22     -999   -999
> > A0000007 040511/1500  -999   -999   25     -999   -999
> > A0000007 040511/1600  -999   -999   27     -999   -999
> > A0000007 040511/1700  -999   -999   17     -999   -999
> > A0000007 040511/1800  -999   -999   17     -999   -999
> > A0000007 040511/1900  -999   -999   9      -999   -999
> > A0000007 040511/2000  -999   -999   15     -999   -999
> > A0000007 040511/2100  -999   -999   16     -999   -999
> > A0000008 040511/0000  9      -999   39     -999   -999
> > A0000008 040511/0100  2      -999   38     -999   -999
> > A0000008 040511/0200  8      -999   37     -999   -999
> > A0000008 040511/0300  7      -999   37     -999   -999
> > A0000008 040511/0400  4      -999   36     -999   -999
> > A0000008 040511/0500  3      -999   38     -999   -999
> > A0000008 040511/0600  4      -999   40     -999   -999
> > A0000008 040511/0700  4      -999   40     -999   -999
> > A0000008 040511/0800  4      -999   40     -999   -999
> > A0000008 040511/0900  5      -999   38     -999   -999
> > A0000008 040511/1000  6      -999   39     -999   -999
> > A0000008 040511/1100  2      -999   38     -999   -999
> > A0000008 040511/1200  1      -999   36     -999   -999
> > A0000008 040511/1300  6      -999   35     -999   -999
> > A0000008 040511/1400  3      -999   35     -999   -999
> > A0000008 040511/1500  5      -999   37     -999   -999
> > A0000008 040511/1600  2      -999   39     -999   -999
> > A0000008 040511/1700  9      -999   39     -999   -999
> >
> > /Charley Knoderer/
> > /Meteorologist 1/
> > /Sonoma Technology, Inc./
> > /1360 Redwood Way, Suite C/
> > /Petaluma, CA  94954/
> > /(707) 665-9900/
> > /FAX: (707) 665-9800/
> > /www.sonomatech.com/ <http://www.sonomatech.com/>
> >
>
>