Retrieving Rain Drop Size Distribution Moments from GPM Dual-Frequency Precipitation Radar

Retrieving Rain Drop Size Distribution Moments from GPM Dual-Frequency Precipitation Radar

Blog Article

A novel method for retrieving the moments of rain drop size distribution (DSD) from the dual-frequency precipitation radar (DPR) onboard the global precipitation mission satellite (GPM) is presented.The method involves the estimation of two chosen reference moments from two modular pillow stack specific DPR products, namely the attenuation-corrected Ku-band radar reflectivity and (if made available) the specific attenuation at Ka-band.The reference moments are then combined with a function representing vaping walrus the underlying shape of the DSD based on the generalized gamma model.Simulations are performed to quantify the algorithm errors.

The performance of methodology is assessed with two GPM-DPR overpass cases over disdrometer sites, one in Huntsville, Alabama and one in Delmarva peninsula, Virginia, both in the US.Results are promising and indicate that it is feasible to estimate DSD moments directly from DPR-based quantities.