= ROPP =

This is the feature request, issue and bug tracking web site for the '''Radio Occultation Processing Package''' (ROPP).

ROPP is a software package designed to assist users to assimilate radio occultation data from any RO mission into NWP and other models. The package is being developed through the EUMETSAT [http://www.grassaf.org/ GRAS SAF].

The latest full release of ROPP ('''ROPP-3 v3.0''') is currently available for users via the [http://garf.grassaf.org/index.php GRAS-SAF Archive and Retrieval Facility (GARF)]. ROPP-4 ('''v4.0''') is currently under development and is expected to be released to users in December 2009.

The ROPP deliverable source code is sub-divided into '''modules''':
 * '''ropp_tools''' : low-level utility routines
 * '''ropp_io'''    : I/O support for RO data in netCDF and BUFR files
 * '''ropp_pp'''    : pre-processor (e.g. to derive refractivity profiles from bending angle profiles (from ROPP-2)) [https://trac.grassaf.org/ropp/wiki/ROPP_PP_tree.html calling tree]
 * '''ropp_fm'''    : forward models (and associated tangent linear, adjoint & gradient code) [https://trac.grassaf.org/ropp/wiki/ROPP_FM_tree.html calling tree]
 * '''ropp_1dvar''' : 1D-Var retrieval & minimizer [https://trac.grassaf.org/ropp/wiki/ROPP_1DVAR_tree.html calling tree]

Supporting modules for documentation, testing and building the source are:
 * '''ropp_doc'''   : user and project documentation for ROPP
 * '''ropp_test'''  : 'Test Folder' system
 * '''ropp_bld'''   : build and configure scripts for ROPP and dependency packages

Further information on ROPP, including the [http://garf.grassaf.org/user-documents/gras_ropp_ug.pdf ROPP User Guide], is available from [http://garf.grassaf.org/software.php GARF].

== The ROPP Repository ==

This ROPP Repository can only be accessed by authorized developers - [https://trac.grassaf.org/ropp/login login required].

For instructions on how to access the ROPP repository (authorized users only)
see the [https://trac.grassaf.org/ropp/wiki/ropp_repository instructions for developers].