RadxDealias

RadxDealias dealiases doppler radar data.

Overview

RadxDealias reads input radar data from a file, dealiases the velocity data, and writes the results to a file.

Prerequesites

The following items are required:

• radar data (any Radx supported format, e.g., cfradial)
• Sounding data
• Parameter files for RadxDealias.

Parameter file

RadxDealias uses one parameter file that includes information about the files and dealiasing thresholds.

Ensure file is up to date

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

/path/to/lrose/install/bin/RadxDealias -print_params > param_file_name

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:

/path/to/lrose/install/bin/RadxDealias -params orig_param_file_name -print_params > new_param_file_name

Important parameters

Input params

• input_dem_parth: directory containing the elevation data
• input_data_format: specifies the format of the elevation data (examples provided in the parameter file)

Radar parameters

• radar_location: latitude, longitude, and elevation (ground elevation
  • radar height in km) of the radar antenna
• radar_wavelength_cm: radar wavelength (cm)
• horiz_beam_width_deg: horizontal beamwidth (degrees)
• vert_beam_width_deg: horizontal beamwidth (degrees)
• gates: starting distance, gate spacing (km), and number of gates
• azimuths: starting azimuth, azimuth spacing (degrees), and number of azimuths
• elevations: starting elevation angle, angle spacing (degrees), and number of elevation angles

Output directory and file name

• output_dir: files will be written to this directory
• output_format: select the preferred file type (usually CFRADIAL)

Running RadxDealias

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

/path/to/lrose/install/bin/RadxDealias -h

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

/path/to/lrose/install/bin/RadxDealias -params param_file_name