Attenuation correction algorithms for precipitating area with polydisperse small spheroid raindrops

Zhenhui Wang; Li Guan; Peichang Zhang; Qing-an Wang

doi:10.1117/12.466104

30 April 2003 Attenuation correction algorithms for precipitating area with polydisperse small spheroid raindrops

Zhenhui Wang, Li Guan, Peichang Zhang, Qing-an Wang

Proceedings Volume 4894, Microwave Remote Sensing of the Atmosphere and Environment III; (2003) https://doi.org/10.1117/12.466104
Event: Third International Asia-Pacific Environmental Remote Sensing Remote Sensing of the Atmosphere, Ocean, Environment, and Space, 2002, Hangzhou, China

Abstract

The relationship between attenuation coefficient, k, and radar reflectivity factor, Z, as well as that between Z and rainfall rate, I, is influenced by the shape of precipitating raindrops and the orientation of their rotatory axes respect to the polarization direction of the incident radar wave. Provided that the orientation of rotatory axes of poly-disperse small spheroid particles is known, correctable thickness of radar echo for attenuation depends mainly on rainfall rate. The heavier the rainfall rate, the thinner the correctable thickness. For an 80mm/hour precipitation uniformly distributed along a radial direction, correctable thickness of radar echo is more than 120km for 5.6cm wavelength and about 50km for 3.2cm if correction algorithm R2 or R3 is used. Orientation information is critically important during attenuation correction. Right k-Z relationship must be coupled with right orientation status.

Citation Download Citation

Zhenhui Wang, Li Guan, Peichang Zhang, and Qing-an Wang "Attenuation correction algorithms for precipitating area with polydisperse small spheroid raindrops", Proc. SPIE 4894, Microwave Remote Sensing of the Atmosphere and Environment III, (30 April 2003); https://doi.org/10.1117/12.466104

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