[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: 20010813: GEMPAK -> WXP Grid?
- Subject: Re: 20010813: GEMPAK -> WXP Grid?
- Date: Mon, 13 Aug 2001 21:04:42 -0600 (MDT)
Mike,
Since you didn't show what the input to gdgrib was, other than the 3
lines shown below, I can't tell what the problem is- but can only guess that
you haven't defined the GRID paramter PDS, vertical coordinate or
vriable to be converted to grib.
Here is what I am using to create the GRIB products in the FNEXRAD feed
in GEMPAK 5.6.D.1:
gdgrib << EOF
GDFILE = nexr
GFUNC = n0r
GDATTIM = last
GLEVEL = 0
GVCORD = none
GBTBLS = ;ncargrib2.tbl
GBFILE = $GBFILE
VERCEN = 2/60/1/1
PDSVAL = n0r%1
PRECSN = b/0
WMOHDR =
CPYFIL =
PROJ =
GRDAREA =
KXKY =
r
e
EOF
In the above, I am using the NCAR center (#60) in the PDS block with
a subcenter (#26) of 1 to signify unidata. You can use NCEP or anything else.
I have defined NOR as parameter #201 in the ncargrib2.tbl (which is included
in the 5.6.D.1 distribution). I am using vertical coordinate %1 (none) for the
surface. I produce a GRIB using #255 in the gds to be the projection of the
gempak grid file itself. You are using CPYFIL=#215 which would produce
a 20km grid....very coarse. My national mosaic is ~6km, and
the regional is 1km. Gdgrib is the same program that is used to create the
HAXA00 KWBC product (10km RCM grid) in NOAAPORT (they use parameter #21 which
is RDSP1).
Steve Chiswell
Unidata User Support
On Mon, 13 Aug 2001, Michael W Dross wrote:
>
> Thanks for the suggestion. On that note. I went to try and convert a .gem
> file into a grib with #215 grid resolution in a file. This what I used.
>
> !/bin/csh -f
> #
> # This script runs GDGRIB in a loop.
> # To change parameters, modify the gdgrib.nts file and issue a
> # kill -INT to the gdgrib process.
> #
>
> while (1 == 1)
>
> gdgrib << EOF
> restore gdgrib.nts
> r
>
> e
> EOF
>
> sleep 30
>
>
> gdgrib.nts
> GDFILE = /weather/gempak/composite/20010813_radr.gem
> GBFILE = /weather/gempak/composite/20010813_radr.grb
> CPYFIL = #215
>
>
>
>
> I got a error message Cannot Open File
> /weather/gempak/composite/20010813_radr.gem. However it is there and
> readable. Any suggestions?
>
> My hope is that I can make a Grib file every 5 mins that could possibly
> sent over the IDD. As we talked about awhile back, if I coud convert
> directly into the WSI
> NOWRAD format, (I have no clue as how to do that) it could be displayed on
> a variety of platforms with ease.
>
> Mike
>
>
>
>
>
> Steve Chiswell
>
> <address@hidden To: Michael W Dross
> <address@hidden>
> r.edu> cc: <address@hidden>,
> <address@hidden>
> Sent by: bcc:
>
> owner-wxp5@unidat Subject: 20010813: GEMPAK ->
> WXP Grid?
> a.ucar.edu
>
>
>
>
>
> 08/13/01 02:41 PM
>
>
>
>
>
>
>
>
>
>
> Mike,
>
> You can create a GRIB product from the GEMPAK grid using the program
> gdgrib.
> Presumably you can make WXP read a grib product.
>
> Steve Chiswell
> Unidata User Support
>
> On Mon, 13 Aug 2001, Michael W Dross wrote:
>
> > Hi all,
> >
> > I was wondering if anyone has tried to convert a GEMPAK grid file (.gem)
> > into a file format WXP can read. The main reason I am curious is
> > that I have GEMPAK creating a national radar mosaic from all the bref and
> > vil's every 5 mins. I can display it fine in GEMPAK, but
> > would be nice to display on WXP. Just wondering if anyone has every
> tried
> > this?
> >
> > Thanks,
> >
> > Mike
> >
> >
>
>
>
>
>
>