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Proceedings Paper

Attenuation correction algorithms for precipitating area with polydisperse small spheroid raindrops
Author(s): Zhenhui Wang; Li Guan; Peichang Zhang; Qing-an Wang
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Paper 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.

Paper Details

Date Published: 30 April 2003
PDF: 6 pages
Proc. SPIE 4894, Microwave Remote Sensing of the Atmosphere and Environment III, (30 April 2003); doi: 10.1117/12.466104
Show Author Affiliations
Zhenhui Wang, Nanjing Institute of Meteorology (China)
Li Guan, Nanjing Institute of Meteorology (China)
Peichang Zhang, Nanjing Institute of Meteorology (China)
Qing-an Wang, Nanjing Univ. (China)

Published in SPIE Proceedings Vol. 4894:
Microwave Remote Sensing of the Atmosphere and Environment III
Christian D. Kummerow; JingShang Jiang; Seiho Uratuka, Editor(s)

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