pyart.retrieve.storm_relative_velocity#

pyart.retrieve.storm_relative_velocity(radar, direction=None, speed=None, field=None, u=None, v=None)[source]#

This function calculates storm-relative Doppler velocities.

Parameters:

  • radar (Radar) – Radar object used.

  • direction (float or string) – Direction of the storm motion vector (where north equals 0 degrees). Accepts a float or a string with the abbreviation of a cardinal or ordinal/intercardinal direction (for example: N, SE, etc.). If both speed/direction and u/v are specified, speed/direction will be used.

  • speed (string) – Speed of the storm motion vector. Units should be identical to those in the provided radar object. If both speed/direction and u/v are specified, speed/direction will be used.

  • field (string, optional) – Velocity field to use for storm-relative calculation. A value of None will use the default field name as defined in the Py-ART configuration file.

  • u (float, optional) – U-component of the storm motion

  • v (float, optional) – V-component of the storm motion

Returns:

sr_data (dict) – Field dictionary containing storm-relative Doppler velocities in the same units as original velocities and the specified storm speed. Array is stored under the ‘data’ key.