CHAMP
This is a modification of a standard text_to_obs converter that comes that
comes with DART.
This observation converter reads CHAMP and GRACE density files, as described in
Sutton (2011) [1] and outputs obs_seq files that can be assimilated using
DART.
Warning
If an obs_seq.out file already exists, this converter automatically adds
new observations to that file without deleting it. This is done to allow the
wrapper script (work/convert.sh) to process sequentially numbered
Density_*.ascii files, as documented in the comments in convert.sh. If you
don’t want this behavior, comment out lines 129-132 in text_to_obs.f90 and
rebuild.
Namelist
Please inspect the text_to_obs_nml namelist in work/input.nml to ensure
the input and output filenames are specified properly.
Note
The work/Density_3deg_02_335.ascii file is truncated to 2 datapoints merely to demonstrate the format. It isn’t meant to be used for real experiments.