3DVAR/4DVAR Observation Converters

Overview

The programs in this directory help convert data which is formatted for input into the 3DVAR/4DVAR programs into DART obs_seq observation files.

This directory contains conversion programs for various obs formats related to 3D-Var, WRF-Var, and MM5:

You need to add some WRF-Var source files to the 3DVAR_OBSPROC directory, and then you can go into the work directory and run the ‘quickbuild.csh’ script.

The little-r converter may need changes to the code to convert from the original quality control flags into QC flags compatible with DART. (in DART, 0 is good data.)

The GTS converter does not support SATEM thickness data but there are versions around which do; write dart@ucar.edu if you are interested in more about this.

And a final disclaimer: Whether these work with the latest 3D-Var format is untested at this point. Please contact the DART Development group if you are interested in using these tools.