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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
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) ( ) Chief Meteorologist /\ Home of the ( ) The Weather Underground, Inc. /\ / \ /\ /\ ( ) 300 N Fifth Ave #240 / \/ \/ \ /\ / \ ------ Ann Arbor, MI 48104 ______/ / \/ \_ \\\\\ 734-994-8824 (voice) Weather Underground \`\`\ 734-994-8919 (fax) http://www.wunderground.com 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 >
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