[Dart-users] Updates to DART subversion repository

[Nancy Collins]

hello dart-users,

over the last week i've committed quite a few updates to the
dart subversion repository.  check the subversion logs for details,
but the short list is:

- the sampling error correction code is documented in the
system_simulation/system_simulation.html and filter.html files.
correction tables for 40 different ensemble sizes have been
precomputed, and instructions for generating tables for other
sizes are included.

- obs_def_wind_speed_mod.f90 was added both as a forward
operator but also as an example of how to write a simple
forward operator.  it's less complicated than the gps or radar
ones and might be a good model to start from if you're looking
to add new forward operators.

- vertical coordinate 'scale height' is now an option for threed_sphere
locations.   see the wikipedia page for a description of what scale height
is, and see the wrf model_mod for an example of converting between
pressure, height, model levels and scale height (in the vert_convert()
subroutine).  thanks to ryan torn for the code.

- localization distances are controlled by the 'cutoff' distance in the
assim_tools_mod namelist.  it is now possible to override this distance
for particular observation types.   see the assim_tools_mod.html file
for more information on this option.

- the wrf model_mod now computes height in meters using the formula
for geometric height instead of geopotential height.  there is a module
global to revert back to the original computation if you want to verify
what kind of difference this makes.

- removed misc prints from a couple of the model_mod files, particularly
the 'sync' messages from the netcdf write routines.

- updates to several of the html documentation files.

- new version of the coamps interfaces, in models/coamps_nest.
contact alex reinecke at the NRL for more details.


i'd recommend updating from the top of the repository, since several
of these changes involve files in more than one directory.

if you have any questions, concerns, or think you see something
that isn't right, please let me know.

thanks,
nancy