git clone https://github.com/jswhit/replay_observer cd replay_observer git submodule update --init --recursive # to checkout build_gsinfo submodule config.sh is main script, hpss.sh is script to archive on hpss ${machine}_preamble is job scheduler preamble for config.sh ${machine}_preamble_hpss is job scheduler preamble for hpss.sh submit_job.sh <machine> submits config.sh (which then submits itself and hpss.sh). most of GSI namelist parameters set in run_gsi_4denvar.sh, some in config.sh. To cold start, create an initial directory in the experiment directory (i.e <expthome>/YYYYMMDDHH) touch an empty file (touch <expthome>/YYYYMMDDHH/cold_start_bias). This will tell the scripts that there is no initial bias correction file. To generate initial bias files with zeros, run build_gsinfo/initbias.py with a satinfo file generated by createsatinfo.sh for the first date of your experiment. Copy the generated zero_abias, zero_abias_pc files to gdas.tHHz.abias, gdas.tHHz.abias_pc to <expthome>/YYYYMMDDHH. Create an empty aircraft bias correction file by touching gdas.tHHz.abias_air. Create analdate.sh in the top level experiment directory (<expthome>). analdate.csh should contain "export analdate=YYYYMMDDHH_start" and "export analdate_end=YYYYMMDDHH_end", where YYYYMMDDHH_start,_end are the dates you want the experiment to start and end. gsi.x executable needs to be in exec_<machine> Problems that can occur: 1) job to get obs/backgrounds from AWS fails, because of slow network connection or problem to data transfer queue). Resubmit. 2) GSI fails when reading aircraft bias correction (gdas.tHHz.abias_air file). Entry has non alphanumeric characters (usually in aircraft ID). Delete that entry and resubmit (or copy abias_air file from previous analysis time). 3) GSI fails when reading radiance bias correction (gdas.tHHz.abias file). Bias correction coefficient overflows format statement (i.e. value becomes less than -9999.999, so that '***' appears in file). Reset value to -9000.000 and resubmit. 4) Job times out due to slow filesystem. Resubmit.