[Met_help] MET
John Halley Gotway
johnhg at rap.ucar.edu
Fri Apr 18 22:26:04 MDT 2008
Elena,
Sounds good. Yes, the ASCII2NC tool will be included in METv1.1. I'm
hoping that it'll meet your needs.
In METv1.1, the ASCII2NC tool will read a very simple ASCII point
observation format we came up with. In future releases, we hope to
support other commonly used ASCII formats directly. And we'll be looking
for input from the community as to which ASCII formats are most common.
I've attached a copy of the sample_pb.nc file to this email. If for any
reason you can't read the attachment (if it's too big or something), I've
also posted it to our anonymous ftp site. You can access it via:
ftp.rap.ucar.edu/incoming/irap/johnhg/sample_pb.nc
Thanks,
John
> Hi John,
>
> Thank you for your answers. I will try to use WRF-NMM postprocessor to
> convert outputs into Grib format.
>
> Regarding the missing "sample_pb.nc" - there was a problem to run pb2nc
> test script. I have attached below an error message. For our application,
> we do not use the step pb2nc, but rather converting our originally ASCII
> obs into netCDF directly, according to description in "NetCDF Point
> Observation Format" document within METv1.0 package. However, it would be
> good to see how METv1.0 package works with the "sample_pb.nc" input - may
> I
> ask you please to send us this file as an example.
>
> Thanks for letting us know about MET team plans to further develop the
> tools for point obs ( hopefully, including ASCII ) in METv1.1 - looking
> forward to this.
>
> Thank you,
> Elena
>
> ---------------------------------------------------------------------------------------------------------------------------------------------------------
> test_pb2nc.sh
>
> *** Running PB2NC on a fortran-blocked PrepBufr file ***
> PrepBufr2NC config file: config/PB2NCConfig_G212
> Opening PrepBufr
> file: ../data/sample_obs/prepbufr/ndas.t00z.prepbufr.tm12.20070401.nr.blk
>
> **************BUFR ARCHIVE LIBRARY ABORT*****************
> BUFRLIB: OPENBF - ERROR READING INPUT FILE CONNECTED TO UNIT 11 WHEN
> CHECKING FOR 'BUFR' IN FIRST 4 BYTES OF RECORD
> **************BUFR ARCHIVE LIBRARY ABORT*****************
>
>
>
>
> "John Halley
> Gotway"
> <johnhg at rap.ucar. To
> edu> Elena Novakovskaia/Watson/IBM at IBMUS
> cc
> 04/16/2008 10:47 met_help at ucar.edu
> PM Subject
> Re: [Met_help] MET
>
>
>
>
>
>
>
>
>
>
> Elena,
>
> To answer your questions...
>
> (1) No, we do not support the NetCDF output directly from the WRF model.
> The model data is put out on the native model grid and model levels.
> However, MET is set up to run on data that's on a regular grid that's been
> interpolated to pressure levels.
>
> (2) In order to get your model output in this format, we strongly
> recommend using the WRF PostProcessor. This is available from the WRF-NMM
> download site: http://www.dtcenter.org/wrf-nmm/users/downloads/index.php
>
> Even though it's only posted on the WRF-NMM download page, it may be run
> on output from WRF run with ARW or NMM. The WRF-NMM User's Guide (also on
> that website) describes how to setup and run the WRF PostProcessor.
>
> The output of the WRF PostProcessor is Grib data on pressure levels... in
> fact, that's why we chose to work with Grib data in the first place.
>
> (3) The file "sample_pb.nc" is generated by the test script which runs the
> pb2nc tool. If pb2nc is not compiled or not run for some reason, it won't
> be generated. The test script named "test_all.sh" calls all of the other
> test scripts in the order they should be executed.
>
> If you'd like me to send you a copy of the generated "sample_pb.nc" file,
> just let me know. I'd be happy to.
>
> However, if you're planning to create your own NetCDF version of point
> observations, I'd suggest waiting for MET version 1.1 in May. We've
> modified that NetCDF point observation format slightly to remove some
> unused variables.
>
> Hope that helps. Please let us know if and when more questions arise.
>
> Thanks,
> John Halley-Gotway
>
>>
>> Hi,
>>
>> My team uses METv1.0 to validate WRF forecast against surface
>> observations.
>> We have both WRF forecast and "point obs" in NetCDF format.
>>
>> 1. Is there any option in PointStat utility to compute statistics using
>> WRF
>> output in netCDF? Below is a segment from PointStat where I can see the
>> check for Grib forecast:
>>
>> ////////////////////////////////////////////////////////////////////////
>>
>> void process_fcst_files() {
>>
>> // Open the forecast file as a Grib file.
>> if( !(fcst_gb_file.open(fcst_file)) ) {
>> cerr << "\n\nERROR: process_fcst_files() -> "
>> << "can't open grib file: "
>> << fcst_file << "\n\n" << flush;
>> exit(1);
>> }
>>
>> // If provided, open up the climatology file as a Grib file.
>> if(climo_flag == 1) {
>>
>> if( !(climo_gb_file.open(climo_file)) ) {
>> cerr << "\n\nERROR: process_fcst_files() -> "
>> << "can't open climatology file: ")
>> << climo_file << "\n\n" << flush;
>> exit(1);
>> }
>> }
>>
>> return;
>> }
>>
>> ////////////////////////////////////////////////////////////////////////
>>
>>
>> 2. Is there any post-processing tool which converts netCDF into Grib to
> be
>> used in PointStat utility?
>>
>> 3. In the test script "test_point_stat.sh" in METv1.0 there is a
> reference
>> to "sample_pb.nc". To execute this test script, is there any sample file
>> "sample_pb.nc" specifically with sample surface observations available
> for
>> download?
>>
>> Thank you,
>> Elena Novakovskaia
>>
>> _______________________________________________
>> Met_help mailing list
>> Met_help at mailman.ucar.edu
>> http://mailman.ucar.edu/mailman/listinfo/met_help
>>
>
>
>
>
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