<br />
Hi,<br />
The NCEP FNL/GFS gridded data can be used as first guess.<br />
You can run real.exe using this data. Your observation<br />
data is not coming to picture to use as first guess.<br />
<br />
Regards<br />
Satyaban<br />
<br />
On Thu, 28 May 2009 06:09:49 +0530 wrote<br />
>Hi,<br />
><br />
>i am try to perform data assimilation using WRFDA. And i use my own<br />
>observation data (point observation from various sites) which is not in any<br />
>of the popular format, such as NETCDF or GRIB, so my observation data was<br />
>transformed to LITTLE_R. And i currently passed the step of running the<br />
>obsproc.exe for pre-process my LITTLE_R formatted data.<br />
><br />
>For running the da_wrfvar.exe, we need the observation file generated from<br />
>obsproc.exe, background error file (i will use var/run/be.dat.cv3 for try)<br />
>and the first guess file. For the first guess file, i see some post that i<br />
>can obtain the first guess from runnig WPS real.exe or wrf.exe. But before<br />
>running real.exe, it need to run ungrib.exe, and the input file of<br />
>ungrib.exe is gridded data. So the question is, my observation data is not<br />
>in any format, and not gridded, how can i transform my own data to gridded<br />
>data and finally producing a first guess file ? Thank you very much<br />
><br />
>Regards,<br />
>Patrick<br />
>_______________________________________________<br />
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>Wrf-users@ucar.edu<br />
>http://mailman.ucar.edu/mailman/listinfo/wrf-users<br />
><br><br>-------------------------------------------------------------------------------<br /><br />
Satyaban Bishoyi Ratna<br /><br />
Computational Atmospheric Sciences Team<br /><br />
Scientific & Engineering Computing Group<br /><br />
Centre for Development of Advanced Computing (C-DAC)<br /><br />
Pune University Campus, Ganeshkhind<br /><br />
Pune - 411 007, Maharashtra, India<br /><br />
E-mail: satyabanb@cdac.in<br /><br />
Tel (O): +91-020-2570 4226, (Cell): +91-094223 56326<br /><br />
--------------------------------------------------------------------------------<br /><br />
<br /><br />
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