Re: [gembud] Using DCMETR

Hi Colton - We are pulling data off NOAA's tgftp server and running it 
through dcmetr.  But we found (thanks to Steve Chizwell) that we needed to 
bound the ob with a string of "AFOS" control characters for the decoder to 
work.  Here is what we did -

1. Created a script "addafos.csh" as follows (these are all zeroes, not 
capital "Oh"s)

#!/bin/csh -f
printf "\001\r\r\n000 \r\r\n"
cat
printf "\r\r\n\003"

2. chmod 777 afos.csh)

3. Run the ob (contained in ob.txt) through addafos.csh and dcmetr as 
follows
cat ob.txt | ./addafos.csh | dcmetr -a 500 -v 2 -t 60 
$GEMDATA/obs/hrly/YYYYMMDD.hrly


Our decode script which contains step 3 actually will make "addafos.csh" 
if it doesnt exist locally. By the way you may want to try pulling 
ftp://tgftp.nws.noaa.gov/data/observations/metar/cycles/hhZ.txt (where hh 
is the current hour in UTC).  This contains specials and will allow you 
decode all obs around the globe in less than 15 min.  If you run a master 
decode script every 15 min, you will have updated obs (surface, not ship), 
from anywhere over the globe.

Pete

gembud-bounces@xxxxxxxxxxxxxxxx wrote on 04/15/2010 03:19:33 AM:

> Hello all!
> 
> I am having issues using the DCMETR decoder, and knew this
> was the right place to ask for help. 
> 
> As I am not a university or institution of note, I am not 
> using LDM or the IDD, and instead had the idea of maybe 
> pulling data off of the NOAA ftp server at ftp://tgftp.nws.noaa.gov/
> . I can successfully login via scripting, etc. I can cd to the 
> ftp://tgftp.nws.noaa.gov/SL.us008001/DF.an/DC.sflnd/DS.metar
> directory, which contains updated metar files. However, 
> these are in a .txt format, and I'm not 100% sure if they 
> are formatted the way DCMETR needs them to be as input 
> files. I am rather new to this, but am learning quickly. I
> just need some data to play with! If anyone can tell me 
> what I may be doing wrong, I would greatly appreciate it. 
> Here are the commands I'm using once I have my file.
> 
> dcmetr -c YYMMDD/HHNN sfcdata.gem < sn.0114.txt
> 
> (the above command's general format I copied from the 
> phelp file for dcmetr)
> 
> dcmetr -c sfcdata.gem < sn.0114.txt
> dcmetr -c /home/gempak/NAWIPS/gempak/data/sfcdata.gem < 
> /home/gempak/NAWIPS/gempak/data/sn.0114.txt
> 
> As you can see, I try specifying explicitly and still, all
> dcmetr does is hang for about half a second, then put me 
> back at the prompt. Nothing is generated as far as logs 
> go, so I have no idea what's going on. I hope this is 
> clear enough. Please help!
> 
> -- 
> Colton Ancell
> Geophysics Major, Texas Tech University.
> KE5DXX_______________________________________________
> gembud mailing list
> gembud@xxxxxxxxxxxxxxxx
> For list information or to unsubscribe,  visit: http:
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