Variation in extinction cross-section of rain drops with temperature

Biswas, Ritujoy; Vidyarthi, Anurag; Jassal, B. S.; Shukla, Ashish

doi:10.1109/etct.2016.7882975

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2022

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“…More so, it was observed that the differences in values increase with increase in the drop size and became conspicuous at about 2.5 mm because at this point the aspect ratio of the non-spherical drop is much less than one, in addition, an increase irregularity is observed with increase in frequencies. The extinction cross section pattern observed agrees with that observed by Biswas et al (2016).…”

Section: Resultssupporting

confidence: 89%

Dependence of raindrop size and shape parameters on rain attenuation prediction over a tropical location

Kolade-Oje,

Ajewole,

Ojo

et al. 2022

Appl. J. Phys. Sci.

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Rain attenuation is a phenomenon that weakens signal propagation, particularly in high frequency bands and in areas with significant rainfall rates, one of which is the tropical area. Falling raindrops undergo changes in shapes as they grow in sizes. The goal of this research is to use a theoretical method to examine the impact of drop shapes and sizes on rain attenuation prediction. The extinction cross section of spherical and non-spherical raindrops was calculated using the Mie theory and T-matrix respectively. The specific rain attenuation for spherical and non-spherical raindrops was computed at various frequencies in the microwave band and compared with the ITU-R838 model. It was observed that the non-spherical drops model has higher values for rain attenuation, and thus is best suitable for predicting rain attenuation.

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Section: Resultssupporting

confidence: 89%