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
printf "\001\r\r\n000 \r\r\n"
2. chmod 777 afos.csh)
3. Run the ob (contained in ob.txt) through addafos.csh and dcmetr as
cat ob.txt | ./addafos.csh | dcmetr -a 500 -v 2 -t 60
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.
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
> 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 <
> 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.
> gembud mailing list
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