[Met_help] [rt.rap.ucar.edu #49489] History for NCDC NOMADS Site 18Z data, in pb2nc

[RAL HelpDesk {for John Halley Gotway}]

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  Initial Request
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Good afternoon, me again,

Now I have woes with pb2nc

The results (in the directory /lfs0/projects/det/sref-emc/biasdown, on jet)
are:
bin/pb2nc gdas1.t18z.adpsfc.tm00.bufr_d.nr gdas1.t18z.adpsfc.tm00.bufr_d.nc
met-config-pb2nc.txt
Reading Config File: met-config-pb2nc.txt
Creating NetCDF File: gdas1.t18z.adpsfc.tm00.bufr_d.nc
Processing PrepBufr File: gdas1.t18z.adpsfc.tm00.bufr_d.nr
ERROR: process_pbfile() -> the observation time should remain the same for
all PrepBufr messages: 1307635200 != 1307631600

So, where did I get gdas1.t18z.adpsfc.tm00.bufr_d.nr?
http://nomads.ncdc.noaa.gov/data/gdas/201106/20110609/

Maybe some combination of stuff is in this file?  Or, perhaps, I need to
tweak met-config-pb2nc.txt to screen those out?

I know, on the DTC web page, it informs me:
*** NOTE: The 18Z filenames are incorrect on this site. The date listed in
the filename is one day later than the observations actually contained in
the file. ***

But I am not sure the workaround for thatŠ

Regards,
Brian Etherton
Forecast Applications Branch
NOAA/OAR/ESRL/GSD
Phone: 303-497-6735, Fax: 303-497-7262
325 Broadway, R/GSD7, Boulder, CO 80305




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  Complete Ticket History
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Subject: Re: [rt.rap.ucar.edu #49489] NCDC NOMADS Site 18Z data, in pb2nc
From: John Halley Gotway
Time: Fri Sep 09 16:34:31 2011

Brian,

This question mirrors almost exactly one we answered a couple of weeks
ago.  Here's the link to that email exchange with gory details:
   http://mailman.ucar.edu/pipermail/met_help/2011-August/001650.html

But to briefly summarize, MET can't read those
"gdas1.t18z.adpsfc.tm00.bufr_d.nr" files.  It can only read the files
with "prepbufr" in their name, like:
   http://nomads.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gdas.20110905/gdas1.t06z.prepbufr.nr
But beware what quality_mark threshold you use since the GDAS folks
set some surface quality marks to 9 as a way of thinning the obs for
the data assimilation process.  See the email exchange for more
info.

Hope that helps.  Just let us know if more issues arise.

Thanks,
John

On 09/09/2011 04:19 PM, RAL HelpDesk {for Brian Etherton} wrote:
>
> Fri Sep 09 16:19:16 2011: Request 49489 was acted upon.
> Transaction: Ticket created by Brian.Etherton at noaa.gov
>        Queue: met_help
>      Subject: NCDC NOMADS Site 18Z data, in pb2nc
>        Owner: Nobody
>   Requestors: Brian.Etherton at noaa.gov
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=49489 >
>
>
> Good afternoon, me again,
>
> Now I have woes with pb2nc
>
> The results (in the directory /lfs0/projects/det/sref-emc/biasdown,
on jet)
> are:
> bin/pb2nc gdas1.t18z.adpsfc.tm00.bufr_d.nr
gdas1.t18z.adpsfc.tm00.bufr_d.nc
> met-config-pb2nc.txt
> Reading Config File: met-config-pb2nc.txt
> Creating NetCDF File: gdas1.t18z.adpsfc.tm00.bufr_d.nc
> Processing PrepBufr File: gdas1.t18z.adpsfc.tm00.bufr_d.nr
> ERROR: process_pbfile() -> the observation time should remain the
same for
> all PrepBufr messages: 1307635200 != 1307631600
>
> So, where did I get gdas1.t18z.adpsfc.tm00.bufr_d.nr?
> http://nomads.ncdc.noaa.gov/data/gdas/201106/20110609/
>
> Maybe some combination of stuff is in this file?  Or, perhaps, I
need to
> tweak met-config-pb2nc.txt to screen those out?
>
> I know, on the DTC web page, it informs me:
> *** NOTE: The 18Z filenames are incorrect on this site. The date
listed in
> the filename is one day later than the observations actually
contained in
> the file. ***
>
> But I am not sure the workaround for thatŠ
>
> Regards,
> Brian Etherton
> Forecast Applications Branch
> NOAA/OAR/ESRL/GSD
> Phone: 303-497-6735, Fax: 303-497-7262
> 325 Broadway, R/GSD7, Boulder, CO 80305
>
>

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