Initial WRF code from NCAR v3.7.0 released 17-Apr-2015.

.gitignore

+commit_notes
+*.[ao]
+*~

README

+WRF Model Version 3.7 (April 17, 2015)
+http://wrf-model.org/users/users.php
+
+------------------------
+WRF PUBLIC DOMAIN NOTICE
+------------------------
+
+WRF was developed at the National Center for Atmospheric Research
+(NCAR) which is operated by the University Corporation for
+Atmospheric Research (UCAR). NCAR and UCAR make no proprietary
+claims, either statutory or otherwise, to this version and
+release of WRF and consider WRF to be in the public domain for
+use by any person or entity for any purpose without any fee or
+charge. UCAR requests that any WRF user include this notice on
+any partial or full copies of WRF. WRF is provided on an "AS
+IS" basis and any warranties, either express or implied,
+including but not limited to implied warranties of
+non-infringement, originality, merchantability and fitness for a
+particular purpose, are disclaimed. In no event shall
+UCAR be liable for any damages, whatsoever, whether direct,
+indirect, consequential or special, that arise out of or in
+connection with the access, use or performance of WRF, including
+infringement actions.
+
+
+======================================
+This is the main directory for the WRF Version 3 source code release.
+======================================
+
+V3.7 Release Notes (4/17/15) (rev 8350):
+-------------------
+
+- For more information on WRF V3.7 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+V3.6.1 Release Notes (8/14/14) (rev 7630):
+-------------------
+
+- For more information on WRF V3.6.1 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+V3.6 Release Notes (4/18/14) (rev 7412):
+-------------------
+
+- For more information on WRF V3.6 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+======================================
+
+V3.5.1 Release Notes (9/23/13) (rev 6868):
+-------------------
+
+- For more information on WRF V3.5.1 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+======================================
+
+V3.5 Release Notes (4/18/13) (rev 6660):
+-------------------
+
+- For more information on WRF V3.5 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+======================================
+
+V3.4.1 Release Notes (8/16/12) (rev 5930):
+-------------------
+
+This is a bug fix release. The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3.4/updates-3.4.1.html,
+and for WRF-NMM at
+http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
+
+======================================
+
+V3.4 Release Notes:
+-------------------
+
+Version 3.4 is released on April 6, 2012 (rev 5745).
+
+- For more information on WRF V3.4 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+======================================
+
+V3.3.1 Release Notes (9/16/11) (rev 5130):
+-------------------
+
+This is a bug fix release. The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3.3/updates-3.3.1.html,
+and for WRF-NMM at
+http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
+
+======================================
+
+V3.3 Release Notes:
+-------------------
+
+Version 3.3 is released on April 6, 2011 (rev 4896).
+
+- For more information on WRF V3.3 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+
+======================================
+
+V3.2.1 Release Notes (8/18/10):
+------------------
+
+This is a bug fix release. The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3.2/updates-3.2.1.html, and
+for WRF-NMM at
+http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
+
+See online User's Guides for latest information.
+
+======================================
+
+V3.2 Release Notes:
+-------------------
+
+Version 3.2 is released on March 31, 2010.
+
+- For more information on WRF V3.2 release, visit WRF User's home pages
+  http://www2.mmm.ucar.edu/wrf/users/, and 
+  http://www.dtcenter.org/wrf-nmm/users/, and read the online User's Guide.
+
+
+======================================
+
+V3.1.1 Release Notes (7/31/09):
+------------------
+
+This is a bug fix release. The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3.1/updates-3.1.1.html, and
+for WRF-NMM at
+http://www.dtcenter.org/wrf-nmm/users/model/wrfv3/updates.php
+
+See online User's Guides for latest information.
+
+======================================
+
+V3.1 Release Notes:
+-------------------
+
+Version 3.1 is released on April 9, 2009.
+
+- For more information on WRF V3.1 release, visit WRF Users home page
+  http://www2.mmm.ucar.edu/wrf/users/, and read the online User's Guide.
+- WRF V3 executable will work with V3.0 wrfinput/wrfbdy (but requires 
+  inserting a new namelist variable use_baseparam_fr_nml in &dynamics). As
+  always, rerunning the new programs is recommended.
+- WRF V3.1 has changed a number of namelists. For example, ucmcall has
+  become sf_urban_physics, pd_moist(scalar/tke/chem) has become 
+  moist_adv_opt (scalar/tke/chem_adv_opt). Helpful messages will be printed
+  to aid you.
+
+
+V3.0.1.1 Release Notes:
+-----------------------
+
+Version 3.0.1.1 has only limited bug fixes compared to version 3.0.1.
+The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.1.html.
+
+
+V3.0.1 Release Notes:
+---------------------
+
+This is a bug fix release. The detailed updates for WRF-ARW can be found at
+http://www2.mmm.ucar.edu/wrf/users/wrfv3/updates-3.0.1.html.
+
+Online User's Guides have also been updated.
+
+======================================
+
+V3.0 Release Notes:
+------------------
+
+- For directions on compiling WRF, see below or Users Web page.
+- For more information on WRF V3 release, visit WRF Users home page
+  http://www2.mmm.ucar.edu/wrf/users/
+- WRF V3 works with WPS, and SI is no longer supported. 
+  Please see User' Guide for WPS.
+- WRF V3 executable does not work with wrfinput/wrfbdy produced by previous versions.
+- WRF V3 has removed one obsolete namelist variable, dyn_opt. Edit with caution.
+
+======================================
+
+WRF update history:
+
+- V2.0.1: May 21, 2004
+- V2.0.2: June 3, 2004
+- V2.0.3: Nov 12, 2004 
+  V2.0.3.1: Dec 3, 2004
+- V2.1: August 4, 2005
+- V2.1.1: Nov 8, 2005
+- V2.1.2: Jan 27, 2006
+- V2.2: Dec 21, 2006
+- V2.2.1: Nov 1, 2007
+- V3.0: April 4, 2008
+- V3.0.1: August 5, 2008
+- V3.0.1.1: August 22, 2008
+- V3.1: April 9, 2009
+- V3.1.1: July 31, 2009
+- V3.2: March 31, 2010
+- V3.2.1: August 18, 2010
+- V3.3: April 6, 2011
+- V3.3.1: Sept 16, 2011
+- V3.4: April 6, 2012
+- V3.4.1: Aug 16, 2012
+- V3.5: April 18, 2013
+- V3.5.1: Sept 23, 2013
+- V3.6: April 18, 2014
+- V3.6.1: Aug 14, 2014
+
+======================================
+
+How to compile and run?
+-----------------------
+
+- In WRFV3 directory, type 'configure' - this will create a configure.wrf
+  file that has appropriate compile options for the supported computers.
+
+  Note: WRF requires netCDF library. If your netCDF library is installed in
+        some odd directory, set environment variable NETCDF before you type
+        'configure'. For example, 
+
+        setenv NETCDF /usr/local/netcdf-pgi
+
+- Type 'compile case_name' where you can find the case_names by simply typing
+  compile. The following are available:
+
+      compile em_b_wave
+      compile em_grav2d_x
+      compile em_heldsuarez
+      compile em_hill2d_x
+      compile em_les
+      compile em_quarter_ss
+      compile em_real
+      compile em_seabreeze2d_x
+      compile em_convrad
+      compile em_squall2d_x
+      compile em_squall2d_y
+      compile em_scm_xy
+      compile em_tropical_cyclone
+
+  Notes: 1. If you are going to create model output file that is more than 2Gb,
+      you should consider using netCDF large file support function. To activate
+      this, one must set the environment variable WRFIO_NCD_LARGE_FILE_SUPPORT.
+      In c-shell environment, do
+
+      setenv WRFIO_NCD_LARGE_FILE_SUPPORT 1
+
+      2. Since V3.2, we support using multiple processors for compilation. The
+      default number of processors used is 2. But if you have any problem with
+      compilation, please try using one processor to compile. To do this, set
+      the following environment variable before compile:
+
+      setenv J "-j 1"
+
+- If sucessful, this will create either real.exe or ideal.exe and wrf.exe
+  in directory main/, and the appropriate executables will be linked into
+  the test directoires under test/case_name, or run/.
+
+- cd to the appropriate test or run directory to run ideal/real/wrf.
+
+- If it is one of the idealized cases (b_wave, hill2d_x, grav2d_x, quarter_ss,
+  squall2d_x, squall2d_y, em_les or em_heldsuarez), cd the the appropriate directory, type
+
+  ./ideal.exe 
+
+  to produce wrfinput_d01 file for wrf model. Then type
+
+  ./wrf.exe 
+
+  to run. 
+
+- If it is real-data case (real), place files from WPS (met_em.*)
+  in the appropriate directory, type
+
+  ./real.exe
+
+  to produce wrfbdy_d01 and wrfinput_d01. Then type
+
+  ./wrf.exe
+
+  to run.
+
+- If you use mpich, type
+
+  mpirun -np number-of-processors wrf.exe
+
+- For information on how to make nested runs, visit
+  http://www2.mmm.ucar.edu/wrf/users/
+
+
+======================================
+
+What is in WRF V3?
+
+- Advanced Research WRF (ARW) solver: Eulerian mass, hydrostatic and non-hydrostatic
+  * Arakawa C-grid staggering
+  * Runge-Kutta 2nd and 3rd order timestep options
+  * scalar-conserving flux form for prognostic variables
+  * 2nd to 6th order advection options (horizontal and vertical)
+  * time-split small step for acoustic modes
+  * small step horizontally explicit, vertically implicit
+  * divergence damping option and vertical time off-centering
+  * external-mode filtering option for mass model
+  * hydrostatic option via namelist option
+  * positive-definite and monotonic advection for moisture, scalar, tke and chemical tracers
+  * global modeling capability on latitude-longitude grid
+  * digital filter initialization
+  * WENO advection options
+
+- Two-way nesting:
+  * multiple domains and multiple nest levels
+  * supports integer nest grid ratio
+  * feedback option for both odd and even nest grid ratios 
+  * smoothing options
+
+- One-way nesting 
+
+- Moving nest 
+  * Specified move
+  * Automatic move using a mid-level vortex-following algorithm
+
+- Physics options:
+  * microphysics (Kessler/ WRF Single Moment 3, 5 and 6 classes / Lin et al./ Mibrandt 2-moment /
+    Eta Ferrier / Thompson / Goddard / 2-moment Morrison / WRF Double Moment 5 and 6 classes /
+    SBU-Lin 5-classes / NSSL 2-moment and 1-moment / CAM 5.1 ) / Thompson aerosol-aware /
+    HUJI full and fast SBM
+  * cumulus parameterization (Kain-Fritsch with shallow convection / 
+    Betts-Miller-Janjic / Grell-Devenyi ensemble / Grell 3D (with shallow convection option) /
+    Grell-Freitas ensemble /
+    Tiedtke (with shallow conv and momentum transport) / NSAS (with shallow conv and momentum transport) /
+    SAS (with shallow conv for ARW) / Zhang-McFarlane (with momentum transport) ) /
+    New Tiedtke (with shallow conv and momentum transport) / Multi-scale KF (with shallow convection)
+  * UW shallow convection / GRIMS shallow convection
+  * planetary boundary layer (Yosei University / Mellor-Yamada-Janjic / ACM2 / QNSE-EDMF / MYNN / 
+    BouLac / UW / TEMF / Grenier-Bretherton-McCaa ) / Shin-Hong 
+  * slab soil model (5-layer thermal diffusion / Noah land-surface model (4 levels) /
+    RUC LSM (6 levels) / Pleim-Xu (2 levels / Noah-MP (4 levels) / SSiB (3 levels) / CLM4 (10 levels) )
+  * Urban canopy model, BEP multi-layer and BEM  (works with Noah LSM, BEP and 
+    BEM also requires MYJ or BouLac)
+  * longwave radiation (RRTM / CAM / RRTMG / new Goddard / FLG )
+  * shortwave radiation (Dudhia / old Goddard / CAM / RRTMG / new Goddard / FLG ), 
+    terrain slope and shading effect
+  * sub-grid turbulence (constant K diffusion/ 2-D Smagorinsky/ predicted TKE /
+    2-D, 6th order diffusion / Nonlinear Backscatter Anisotropic (NBA) sub-grid turbulence stress for LES )
+  * Rayleigh damping for w at the upper boundary layer
+  * gravity wave drag (including flow blocking)
+  * land-use categories determine surface properties; support for 24 category USGS and 
+    20 category MODIS 
+  * Options for modifying SST, sea ice, vegetation fraction, albedo, and deep soil temp
+    for long simulations
+  * fractional sea ice option for polar regions; modified snow/ice physics
+  * single-column ocean mixed layer model / 3D Price-Weller-Pinkel (PWP) ocean model
+  * drag and enthalpy flux formulation for hurricane applications
+  * CLM lake model
+  * windfarm drag
+
+- Nudging:
+  * three-dimensional and surface analysis nudging 
+  * observation nudging 
+  * spectral nudging
+
+- Software
+
+  * Hierarchical software architecture that insulates scientific code
+    (Model Layer) from computer architecture (Driver Layer)
+  * Multi-level parallelism supporting shared-memory (OpenMP), distributed-memory (MPI), 
+    and hybrid share/distributed modes of execution
+  * Active data registry: defines and manages model state fields, I/O,
+    nesting, configuration, and numerous other aspects of WRF through a single file, 
+    called the Registry
+  * Two-way nesting:
+      Easy to extend: forcing and feedback of new fields specified by
+        editing a single table in the Registry
+      Efficient: 5-8% overhead on 64 processes of IBM
+      Moving nests.
+  * Enhanced I/O options:
+      NetCDF and Parallel HDF5 formats
+      Nine auxiliary input and history output streams separately controllable through the namelist
+      Special input streams for analysis and observation nudging
+      Output file names and time-stamps specifiable through namelist
+      Special output stream for 3DVAR
+  * Efficient execution on a range of computing platforms:
+      IBM SP systems, (e.g. NCAR "bluevista","blueice","bluefire" Power5-based system)
+      IBM Blue Gene
+      SGI Origin and Altix
+      Linux/Intel
+         IA64 MPP (HP Superdome, SGI Altix, NCSA Teragrid systems)
+         IA64 SMP
+         x86_64 (e.g. TACC's "Ranger", NOAA/GSD "wJet" )
+	 PGI, Intel, Pathscale, gfortran, g95 compilers supported
+      Sun Solaris (single threaded and SMP)
+      Cray X1, X1e (vector), XT3/4 (Opteron)
+      Mac Intel/ppc, PGI/ifort/g95
+      NEC SX/8
+      HP-UX
+      Fujitsu VPP 5000, FX10
+      Intel MIC
+  * RSL_LITE: communication layer, scalable to very large domains, supports nesting.
+  * I/O: NetCDF, parallel NetCDF (Argonne), HDF5, GRIB, raw binary, Quilting (asynchronous I/O), MCEL (coupling)
+  * ESMF Time Management, including exact arithmetic for fractional
+    time steps (no drift).
+  * ESMF integration - WRF can be run as an ESMF component.
+  * Improved documentation, both on-line (web based browsing tools) and in-line
+

README.DA

+------------------------
+WRFDA PUBLIC DOMAIN NOTICE
+------------------------
+
+WRF Data Assimilation System (WRFDA) was developed at the National 
+Center for Atmospheric Research (NCAR) which is operated by the 
+University Corporation for Atmospheric Research (UCAR). NCAR and 
+UCAR make no proprietary claims, either statutory or otherwise, 
+to this version and release of WRFDA and consider WRFDA to be in 
+the public domain for use by any person or entity for any purpose 
+without any fee or charge. UCAR requests that any WRFDA user include
+this notice on any partial or full copies of WRFDA. WRFDA is provided
+on an "AS IS" basis and any warranties, either express or implied, 
+including but not limited to implied warranties of non-infringement, 
+originality, merchantability and fitness for a particular purpose, 
+are disclaimed. In no event shall UCAR be liable for any damages, 
+whatsoever, whether direct, indirect, consequential or special, that 
+arise out of or in connection with the access, use or performance of 
+WRFDA, including infringement actions.
+
+
+======================================
+This is the main directory for the WRFDA Version 3 source code release.
+======================================
+
+V3.7 Release Notes :
+-------------------
+
+Version 3.7 was released on April 20, 2015.
+
+  For more information on WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+  New features:
+
+    -New background error option: CV7 (cv_options = 7)
+    -Radar assimilation has been updated: new options have been added for reflectivity assimilation
+    -A new mp_physics option is available for WRFPLUS in 4DVAR runs
+
+  Updated features:
+
+    -WRFDA can now use WRF files with the "lat-lon" (cylindrical equidistant) map projection. This 
+     does not include global WRF files.
+    -Updated libraries:
+        -RTTOV interface is now for RTTOV Version 11.1 or 11.2
+    -Bug fixes and performance improvements
+    -WRFPLUS has been upgraded to V3.7.
+======================================
+
+V3.6.1 Release Notes :
+-------------------
+
+Version 3.6.1 was released on August 14, 2014.
+
+  For more information about WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+  Updated features:
+
+    - A number of issues have been fixed for this release, including:
+        - The FGAT capability has been updated to produce better results
+        - Several bugs which may cause compilation failure
+        - Bugs in SEVIRI radiance assimilation
+        - Errors when using RTTOV to assimilate radiances in 4DVAR
+        - The FGAT capability has been updated to produce better results
+        - Many other minor problems
+    - WRFPLUS has been upgraded to V3.6.1
+
+See http://www2.mmm.ucar.edu/wrf/users/wrfda/updates-3.6.1.html for a full list of updates
+
+======================================
+V3.6 Release Notes :
+-------------------
+
+Version 3.6 was released on April 18, 2014.
+
+  For more information on WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+  New features:
+
+    -Dual-resolution hybrid assimilation has been implemented
+    -New instruments can be assimilated:
+        -Meteosat SEVIRI
+        -Metop-B instruments
+        -AIREP humidity observations
+    -Observation thinning for conventional observations in ASCII format
+
+  Updated features:
+
+    -GPS Radio Occultation data can now be read separately from other conventional data types
+    -Wind speed/direction assimilation has been updated, and namelist options have changed. See the
+     relevant section of the User's Guide for more information.
+    -Updated libraries:
+        -CRTM Version 2.1.3
+        -BUFR Version 10.2.3
+        -RTTOV interface is now for RTTOV Version 11.1
+    -Bug fixes and performance improvements
+    -WRFPLUS has been upgraded to V3.6.
+
+======================================
+V3.5.1 Release Notes :
+-------------------
+
+Version 3.5.1 is released on September 23, 2013.
+
+  For more information on WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+
+  The following bugs have been fixed:
+    -BUFR libraries have been updated to allow WRFDA to read and assimilate NCEP PREPBUFR files of 
+     any endianness.
+    -Compilation failure with some older Fortran95 compilers
+    -A problem with Variational Bias Correction (VARBC) on some platforms
+    -A problem with OBSPROC's built-in observation error file (obserr.txt) on some platforms
+    -A bug causing failures when "print_detail_outerloop=true"
+    -A few more miscellaneous fixes
+
+======================================
+V3.5 Release Notes :
+-------------------
+
+Version 3.5 is released on April 18. 2013.
+
+  For more information on WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+  New features:
+
+    -Wind Speed/Direction Assimilation: Wind speed/direction observations can now be directly 
+     assimilated.
+    -New satellite instruments can be assimilated:
+        -METOP Infrared Atmospheric Sounding Interferometer (IASI)
+        -NPP Advanced Technology Microwave Sounder (ATMS)
+        -FY3 Microwave Temperature Sounder (MWTS) and Microwave Humidity Sounder (MWHS)
+
+  Updated features:
+
+    -Yellowstone compilation options: Specific compilation options for the new NCAR supercomputer 
+        Yellowstone have been added.
+    -Updated I/O for improved back-compatability with previous versions of WRF and WRFDA
+    -WRFDA-3DVAR can now read two different PREPBUFR observation files at once
+    -The "ntmax" namelist variable is now a vector, and can be set to a different value for each 
+     outer loop
+    -WRFPLUS has been upgraded to V3.5 and it is consistent with the released WRF version 3.5.
+
+======================================
+V3.4.1 Release Notes :
+-------------------
+
+Version 3.4.1 is released on August 16, 2012.
+
+- For more information on WRFDA, visit the WRFDA Users home page
+  http://www2.mmm.ucar.edu/wrf/users/wrfda/index.html
+
+- WRFDA registry files have been reconstructed.
+  Default namelist settings are now in registry.var file.
+
+- WRFPLUS registry bug fixes related to mp_physics=9,10,13,14,16,17,18
+
+======================================
+V3.4 Release Notes :
+-------------------
+
+Version 3.4 is released on April 6, 2012.
+
+- The WRFPLUS (WRF adjoint and tangent linear model) has been upgraded to V3.4 and it is consistent
+  with the released WRF version 3.4. Added parallel WRF TL/AD based on WRF 3.4.
+
+- WRFDA 4D-Var now supports compilation to run in parallel.
+
+- WRFDA 4D-Var now supports precipitation data (such as stage IV) assimilation.
+
+- The ability to generate forecast sensitivity to observations has been updated.
+
+- WRFDA Hybrid 3D-Var has been updated.
+
+======================================
+
+V3.3.1 Release Notes :
+-------------------
+
+Version 3.3.1 is released on September 27, 2011.
+
+- WRF 4D-Var has been improved on lateral boundary condition control, analysis scheme for surface 
+  observation etc.
+  
+- Lots of bug fixes.
+
+======================================
+
+V3.3 Release Notes:
+-----------------------
+
+Version 3.3 is released on April 6, 2011.
+
+- RTTOV interfaces has been upgraded to version 10.0
+  Please download RTTOV v10.0 and install it in appropriate location 
+  if you want to use RTTOV to assimilate radiance observation with bufr format
+
+- crtm_atmosphere is removed from the namelist. 
+  Now the CRTM reference climatology is determined inside WRFDA based on 
+  latitude and month.
+
+- New WRF 4D-Var
+  The WRFPLUS (WRF adjoint and tangent linear model) has been upgraded to V3.3 
+  and it is consistent with the released WRFV version 3.3. However, only dry dynamic 
+  processes are included in WRFPLUS version 3.3 and only serial run is supported
+  at this release.
+  WRFDA is also upgraded to consistent with WRFPLUS version 3.3 and the new 4D-Var 
+  system is a single executable application. Please refer to Users' guide for the