= ROPP =

This is the feature request, issue and bug tracking web site for the '''Radio Occultation Processing Package''' (ROPP).
ROPP is a sofware package designed to assist NWP users to assimilate radio occultation data from any RO mission such as 
GRAS, COSMIC, CHAMP or GRACE-A. The package is being developed through the EUMETSAT '''GRAS SAF'''.

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)
 * '''ropp_qc'''    : quality control routines
 * '''ropp_fm'''    : forward models (and associated tangent linear, adjoint & gradient code)
 * '''ropp_1dvar''' : 1D-Var retrieval & minimiser
Collectively, these modules are knowns as '''ropp_src'''. Not all of these modules have been implemented for the first release (ROPP-1), but will be added for later releases.

Further information on ROPP is available from the [http://www.grassaf.org/ GRAS-SAF].

== The ROPP Repository ==

The whole ROPP development system is divided into three areas:
 * '''ropp_src'''   : deliverable code & supporting development system
 * '''ropp_doc'''   : user and project documentation
 * '''ropp_test'''  : Test Folder (test system and its results)
 
The repository for ROPP can be accessed via the Subversion server at the URL
{{{
https://svn.grassaf.org/ropp/
}}}

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