We are now seeing all 154 of the nexrads coming through unencoded on
NOAAPORT. The age of free NEXRAD is here!
I meant to say FGF, not FFG, sorry about that!
Dr. Jeff Masters (jmasters@xxxxxxxxxxxxxxxx) ( )
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On Tue, 9 Jan 2001, Thomas L. Mote wrote:
> FFC is Peachtree City (basically Atlanta). I also
> don't see an FFG. We've been receiving data, but how will I
> know which is unencoded? I tried loading some of the more
> recent images in GEMPAK 5.6a but no dice.
> Thomas L. Mote
> University of Georgia
> On Tue, 9 Jan 2001 15:03:32 -0500 Dan Vietor
> <devo@xxxxxxxxxxxxx> wrote:
> > > I am cheerfully watching the NEXRAD data flow in here, it is
> > > great to see!
> > >
> > > However, I am seeing some products from stations that are not
> > > in my WXP
> > > rad.cty list of stations:
> > >
> > > FFG
> > > GID
> > > LMK
> > > TOP
> > > UNR
> > >
> > > TOP is easy to guess, it is TWX (Topeka). Can anyone shed light on the
> > > rest of these?
> > WXP uses the official NWS identifiers for the Nexrad sites and not the
> > identifier for the WFO. This is for consistency with RCM, MDR and other
> > radar products.
> > BTW, I don't find any sites with FFG. There is Atlanta which is FFC.
> > I file Nexrad sites by the ID listed in the AWIPS header and not the WMO
> > header:
> > ** SDUS51 KPHI 091837 ***
> > N0RDIX
> > I file on the DIX, not the PHI. Here is my pqact.conf line:
> > #
> > # Radar - NIDS
> > WMO ^SDUS5. .... ([0-3][0-9])([0-2][0-9])([0-5][0-9]).*/p(...)(...)
> > PIPE -close /home/ldm/bin/ucnids -c -
> > /home/ldm/data/nids/\5/(\1:yy)(
> > \1:mm)\1\2\3_\4.nid
> > > Also, in clear air mode, how can you have a negative
> > > reflectivity? Is a negative return ever really due to
> > > precipitation?
> > Its possible for snow but not rain. Some types of snow have a very
> > small cross-section exposed to the radar beam. This means it will
> > rarely have Dbz returns in the positive area. The problem is that there
> > are a lot of other things that return Dbz values of 5 or less, like
> > birds, insects, clouds, ground clutter. So you have to know what your
> > looking for.
> > ________________________________________________________
> > Daniel Vietor Mail: devo@xxxxxxxxxxxxx
> > Unisys Corp Title: Engineer/Meteorologist
> > 221 Gale Lane Phone: 610-925-5206
> > Kennett Square PA 19348 Fax: 610-925-5215
> Thomas L. Mote tmote@xxxxxxx
> Associate Professor of Geography ph: 706-542-2906
> University of Georgia lab: 706-542-6060
> Athens, GA 30602-2502 USA fax: 706-542-2388