The pre-compiled WRFDA can be accessed from/wrfhelp/SOURCE_CODE/WRFDA.
If you would like to have a copy of the code in your local working directory, follow the steps below.
cd /data1/${USER}/DA (your main working directory)
cp /wrfhelp/SOURCE_CODE/WRFDA_compiled.tar.gz .
tar -xzf WRFDA_compiled.tar.gz
This will generate the directory
WRFDA
The WRFDA code is pre-compiled to run in parallel (dmpar) mode using the PGI compiler.
The command for running a dmpar job on the classroom machine is
mpirun -np 4 ${your_exe_file}
Note: In the pre-compiled tar file, the code was compiled for 3D-VAR and 4D-VAR separately, but the executables are placed under the same WRFDA/var/build directory with the 3DVAR and 4DVAR executables renamed as da_wrfvar.exe_3dvar and da_wrfvar.exe_4dvar respectively.
Note: In the pre-compiled tar file, the un-supported scripts (can be downloaded separately from http://www2.mmm.ucar.edu/wrf/users/wrfda/download/tools.html) are already included.