The associated 'tarball' file contains the DART software distribution tree.  

Start with DART/doc/html/index.shtml for general documentation
on compiling and running DART.  A full DART/data assimliation tutorial
is under DART/tutorial, in pdf and framemaker format.  Also, each top level
source directory contains .html documentation of the subroutines, and
associated fortran namelist options.


For the impatient, very brief hints on getting started:

"filter" is the main data assimilation executable.  It is an MPI program,
so it is generally compiled with 'mpif90'.  The WRF executable is
compiled and run separately.  The 'runme_filter' shell script in the
DART/models/wrf/work directory orchestrates the execution of the 2 programs.

To compile a test program:

 cd to DART/mkmf
 copy the correct mkmf.template.xxx file to mkmf.template for your
    hardware/compiler combination
 cd DART/models/lorenz_96/work
 ./workshop_setup.csh    # runs a simple 1d system, for testing
 
If this works, then for the WRF-specific code:

 cd DART/models/wrf/work
 ./workshop_setup.csh    # this compiles several executables

 cp ../shell_scripts/advance_model.csh .

Get a copy of the WRF code and any associated input files.
Put the executables, shell scripts, input.nml namelist files
along with WRF and the data files into one directory and run:

runme_filter

to launch the job.   

Read the html pages for more details.