METplus Practical Session Guide (Version 5.0) | Session 4: Ensemble and PQPF > MET Tool: Gen-Ens-Prod

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Gen-Ens-Prod Tool: General

Gen-Ens-Prod Functionality

The Gen-Ens-Prod tool may be used to generate simple ensemble products from the provided ensemble forecast members. If climatological mean and standard deviation data is provided, it can be used to set thresholds for the ensemble product generation at each grid point. This tool does not provide methods to generate statistical output from the ensemble members, nor does it allow comparisons. If this is the desired outcome, Gen-Ens-Prod output can be passed to additional MET tools for further verification steps.

Gen-Ens-Prod Usage

View the usage statement for Gen-Ens-Prod by simply typing the following:

Usage: gen_ens_prod  
  -ens file_1 ... file_n | ens_file_list Input gridded ensemble files to be used, or ASCII list of ensemble member file names.
  -out file netCDF output file.
  -config file GenEnsProd file containing the desired configuration settings.
  [-ctrl file] Contains the ensemble control data (optional).
  [-log file] Outputs log messages to the specified file (optional).
  [-v level] Level of logging (optional).

Gen-Ens-Prod has three required arguments. You can specify the list of ensemble files to be used either by entering the file name for each ensemble member file (-ens ens_file_1 ... ens_file_n) or as an ASCII file containing the names of the ensemble files to be used (ens_file_list). Choose whichever way is most convenient for you. The output netCDF file containing the requested ensemble products is set with -out file. Finally, -config file requires a configuration file for processing.

Gen-Ens-Prod has additional optional settings. These include the -ctrl file, allowing users to set an ensemble control member file. This file's data will be included for ensemble mean computations, but excluded for ensemble spread. Log messages created during runtime can be saved using -log file. And as seen in other MET tools, -v level will control the verbosity of the tool's log messages.