Atmosphere DA

The atmospheric data assimilation is derived from the GFS-LETKF by Guo-Yuan Lien. For a full description of the original system (the majority of which still directly applies to this system) see the LETKF wiki here

Compiling

from within ./letkf-gfs run make. This will compile the GFS-LETKF, as well as the utilities in ./letkf-gfs/util/

Downloading data

To download a 1 month set of conventional observations for the atmosphere, run:

./util/get_ncepobs.sh EMAIL PASSWD 2010010100 20100201

(where EMAIL and PASSWD are for an account on rda.ucar.edu

Running an experiment

TODO, finish writing this section