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ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

INVESTIGATION OF FLUCTUATIONS OF INCOHERENT SIGNALS SCATTERED BY CLOUDS

heading: 
RADIOWAVE PROPAGATION, RADIOLOCATION AND REMOTE SENSING
Voitovych, O, Zatserklyana, A, Rudnev, G, Khalameida, D, Khlopov, G, Khomenko, S
Organization: 

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine
E-mail: khlopov@ire.kharkov.ua
https://doi.org/10.15407/rej2015.02.048
Language: russian
Abstract: 

Fluctuations of signals scattered by clouds deal with turbulent processes, which strongly influence flight safety and contain information about physical phenomena in clouds. That is why remote sensing by weather radar is of great interest for diagnosis and forecast of meteorological phenomena that take place in clouds. But the majority of such radar use incoherent signal processing, spectral characteristics of which practically have not been described in literature, so in the paper we present the results of yearlong experimental study of incoherent signal fluctuations spectrums in 3 cm waveband reflected from clouds in 3 cm waveband as well as dissipation speed of turbulent energy. As it was shown the most probable velocity spectrum width is about l / 2f » 45 cm/s and mean square value is 27 cm/s, where l is operating wavelength and f is current frequency in signal spectrum. Also the maximums of radar reflectivity and dissipation speed do not coincide, at that the most number of turbulent cells of different dimensions are concentrated in upper cloud parts because of maximal influence of solar energy.
Keywords: meteorogical objects, rate of energy dissipation, spectrums of fluctuations, turbulence

Manuscript submitted 12.05.2015
PACS     92.60.Ta
Radiofiz. elektron. 2015, 20(2): 48-53
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