pyart.retrieve.est_rain_rate_a(radar, alpha=None, beta=None, a_field=None, rr_field=None)[source]

Estimates rainfall rate from specific attenuation using alpha power law.

  • radar (Radar) – Radar object.

  • alpha, beta (floats, optional) – Factor (alpha) and exponent (beta) of the power law. If not set the factors are going to be determined according to the radar frequency.

  • a_field (str, optional) – Name of the specific attenuation field to use.

  • rr_field (str, optional) – Name of the rainfall rate field.


rain (dict) – Field dictionary containing the rainfall rate.


Diederich M., Ryzhkov A., Simmer C., Zhang P. and Tromel S., 2015: Use of Specific Attenuation for Rainfall Measurement at X-Band Radar Wavelenghts. Part I: Radar Calibration and Partial Beam Blockage Estimation. Journal of Hydrometeorology, 16, 487-502.

Ryzhkov A., Diederich M., Zhang P. and Simmer C., 2014: Potential Utilization of Specific Attenuation for Rainfall Estimation, Mitigation of Partial Beam Blockage, and Radar Networking. Journal of Atmospheric and Oceanic Technology, 31, 599-619.