[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[GEMPAK #SRN-525145]: dcwtch newbie question

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [GEMPAK #SRN-525145]: dcwtch newbie question
  • Date: Tue, 22 May 2007 09:19:04 -0600
> Hi..
> 
> I am attempting to use dcwtch (not dcwAtch) to decode watch boxes from SPC
> for use in NMAP2.  I have installed GEMPAK 5.10.2 successfully on RedHat
> ES 4 and am pulling wwus30 kwns files from NOAA.
> 
> What am I missing here?  A manual test on the command line via..
> 
> wwus30.kwns.saw.5.txt
> 
> provides no feedback to the screen (appears to run normally) with the
> following output stored in test.log
> 
> [811] 070521/1401[DC 3]  Starting up. Version 5.10.2
> [811] 070521/1401[DC 2]  read 501/102399 bytes strt 0 newstrt 501
> [811] 070521/1401[DC 2]  read 0/101898 bytes strt 501 newstrt 501
> [811] 070521/1401[DC 5]  Normal termination.
> [811] 070521/1401[DC 2]  Number of bulletins read and processed: 0
> [811] 070521/1401[DC 6]  Shutting down.
> 
> From the help files and the email threads it seems dcwtch is looking for
> wous20 or wwus30 text messages (not wwus40)..
> am I incorrect?  If I am correct, perhaps I using the wrong command line
> arguments for dcwtch?
> 
> For reference here is the content wwus30.kwns.saw.5.txt
> 
> WWUS30 KWNS 151751
> SAW5
> SPC AWW 151751
> WW 275 SEVERE TSTM IL IN MI OH LE LH 151755Z - 160200Z
> AXIS..80 STATUTE MILES EAST AND WEST OF LINE..
> 20SE DNV/DANVILLE IL/ - 5ENE BAX/BAD AXE MI/
> ..AVIATION COORDS.. 70NM E/W /31N TTH - 34NNW ECK/
> HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
> MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26025.
> LAT...LON 39998883 43798450 43798129 39998581
> THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
> COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
> FOR WOU5.
> 
> Pete
> 

Pete,

The decoders are expecting the FOS or AFOS bulletin delimeters to
identify where
a product starts/stops. Since your log output shows no bulletins read,
you
will have to add them to the bulletins before streaming them to DC text
bulletin decoders, such as the following script:

----------------- addfos.csh -------------------
#!/bin/csh -f
printf "\001\r\r\n000 \r\r\n"
cat
printf "\r\r\n\003"
----------------- end of csh script ---------------

place the 4 line script in a file called addfos.csh, and make the script
executable with "chmod a+x addfos.csh"

then pipe your data to the decoder through the above script such as:

cat  wwus30.kwns.saw.5.txt | addfos.csh | dcwtch -v 1 -d - -c 15/1800 
YYYYMMDDHH.watch

Using your text product below, you should obtain output that looks like:
|TS|070515/1755|070516/0200|275 |0|0    
    39.99   -85.82
    39.99   -88.84
    43.80   -84.50
    43.80   -81.29

Steve Chiswell
Unidata User Support



Ticket Details
===================
Ticket ID: SRN-525145
Department: Support GEMPAK
Priority: Normal
Status: Closed