ROPP_1DVAR data files for release version v10.0
----------------------------------------------

This directory contains a collection of data files used by ROPP_1DVAR.

Notes on the data files in this directory:

IT-1DVAR-01_b.nc   - 5x FASCOD + 3x ECMWF 'ducting' background profiles
IT-1DVAR-01_c.nc   - Background error covariance matrix for ECMWF 60 levels
IT-1DVAR-01_y.nc   - Observation (refractivity profiles) simulated from
                     the above background profiles.
                   
IT-1DVAR-04_b.nc   - 5x Met Office background profiles
IT-1DVAR-04_c.nc   - Background error covariance matrix for Met Office levels
IT-1DVAR-04_y.nc   - Co-located COSMIC radio occultation observations
IT-1DVAR-04_o.nc   - Refractivity observation error covariance matrix
  
IT-1DVAR-05_b.nc   - 10x ECMWF background profiles
IT-1DVAR-05_c.nc   - Background error covariance matrix for ECMWF 91 levels
IT-1DVAR-05_y.nc   - Co-located GRAS radio occultation observations
IT-1DVAR-05_o.nc   - Refractivity observation error covariance matrix

*20090401_000329_M02_2030337800_N0007_YYYY*.nc - 
                     Source and reference files for testing ropp -direct_ion.

The IT-1DVAR-01 files are input to the test_1dvar script in the
ropp_1dvar/tests directory (ie invoked by make test). 
See ropp_1dvar/tests/test_1dvar.sh

The IT-1DVAR-04 files may be used for testing the use of observation error 
correlations. See ropp_1dvar/tests/test_1dvar_COSMIC*.sh

The IT-1DVAR-05 files contain pre-operational GRAS data, available from the 
ROM SAF archive http://www.romsaf.org/. 
See ropp_1dvar/tests/test_1dvar_GRAS_*.sh

See ropp_1dvar/tests/test_1dvar_iono.sh for use of the
*20090401_000329_M02_2030337800_N0007_YYYY* files.

There are also various reference files, against which the results of the tests
of the various ropp_fm tools and routines held in the ../tests directory and
routinely performed when building ropp_fm, will be compared.


ROPP Development Team
Met Office

Version 10.0
30 September 2020
