Jcdehart: Created page with "Titan is the Thunderstorm Identification, Tracking, Analysis and Nowcasting application. === '''Overview''' === Titan identifies storms in 3-D radar data stored in MDV forma..."

2021-07-06T17:44:58Z

Created page with "Titan is the Thunderstorm Identification, Tracking, Analysis and Nowcasting application. === '''Overview''' === Titan identifies storms in 3-D radar data stored in MDV forma..."

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Titan is the Thunderstorm Identification, Tracking, Analysis and Nowcasting application.

=== '''Overview''' ===

Titan identifies storms in 3-D radar data stored in MDV format, tracks the storms and forecasts their position using extrapolation.

=== '''Prerequesites''' ===

The following items are required:

* Radar data (MDV format)

=== '''Parameter file''' ===

Titan uses one parameter file that includes information about the input/output directories and thunderstorm tracking parameters.

==== '''Ensure file is up to date''' ====

To obtain the default parameter file, use the following command:

<code lang="bash">/path/to/lrose/install/bin/Titan -print_params > param_file_name</code>

If you already have a parameter file and simply want to check for (and add) updated parameters while retaining current parameters, use the following command:

<code lang="bash">/path/to/lrose/install/bin/Titan -params orig_param_file_name -print_params > new_param_file_name</code>

==== '''Important parameters''' ====

Program mode of operation

* mode: determines if the program waits for new files (REALTIME), moves through start and end times specified on the command line (ARCHIVE), runs on the output from a model run (FORECAST), or runs only the tracking algorithm (RETRACK)

Data input

* input_url: path to MDV files

Data fields in input files

* dbz_field: name or field number of the reflectivity field
* vel_available: indicate whether velocity data is available
* vel_field: name or field number of the velocity field

Vertical profile - sounding

* sounding_mode: determines whether the sounding is specified in the parameter file (SPECIFY_SOUNDING) or read in from an Spdb database (READ_SOUNDING_FROM_SPDB)
* specified_sounding: enter the sounding, for SPECIFY_SOUNDING mode only
* sounding_spdb_url: path to Spdb sounding data, for READ_SOUNDING_FROM_SPDB mode only

Data output

* storm_data_dir: path where storm files are written
* spdb_output_url: Spdb database will be written to this directory

=== '''Running Titan''' ===

To check all command line options for Titan, including debugging options and file paths, type the following command into a terminal.

<code lang="bash">/path/to/lrose/install/bin/Titan -h</code>

Once your parameter file is complete, use a command similar to the following to run the application:

<code lang="bash">/path/to/lrose/install/bin/Titan -params param_file_name</code>

Titan - Revision history

Jcdehart: Created page with "Titan is the Thunderstorm Identification, Tracking, Analysis and Nowcasting application. === '''Overview''' === Titan identifies storms in 3-D radar data stored in MDV forma..."