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|Title:||Integral equation approximation to microwave specific attenuation by distorted raindrops: the Pruppacher-and-Pitter model||Authors:||Li, L.W.
|Issue Date:||1995||Citation:||Li, L.W.,Kooi, P.S.,Leong, M.S.,Yeo, T.S. (1995). Integral equation approximation to microwave specific attenuation by distorted raindrops: the Pruppacher-and-Pitter model. Proceedings of IEEE Singapore International Conference on Networks/International Conference on Information Engineering IEEE SICON/ICIE : 600-604. ScholarBank@NUS Repository.||Abstract:||An integral equation approximation that combines the scattering-radiation conversion, the small perturbation technique and the spherical vector eigenfunction expansion method is employed in this paper to investigate the radio wave attenuation by a realistically distorted scatterer, i.e. the Pruppacher-and-Pitter (P-P) model raindrop. A simple and modified non-symmetric model that fits the Pruppacher-and-Pitter distorted raindrop shapes by means of the least squares is used in the calculation. The scattered electromagnetic fields are integrated from the scattering dyadic Green's function and the volumetric current distribution of an assumed point source that generates the plane waves. Moreover, the scattering coefficients are derived. Total (extinction) cross sections (TCS's) of the realistic P-P model raindrops at the frequency of 15, 21.225 and 38 GHz are computed and compared with those of the spheroidal raindrops. The specific microwave attenuations of the plane wave due to the P-P model raindrops are calculated numerically and compared with both the measured data and the computed attenuation due to spheroids. Comparison shows slight difference between the computed results obtained using the spheroidal raindrops and the P-P model raindrops; and close agreement between the computed results and the experimental data.||Source Title:||Proceedings of IEEE Singapore International Conference on Networks/International Conference on Information Engineering IEEE SICON/ICIE||URI:||http://scholarbank.nus.edu.sg/handle/10635/81489|
|Appears in Collections:||Staff Publications|
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