INVESTIGATION OF FLUCTUATIONS OF INCOHERENT SIGNALS SCATTERED BY CLOUDS

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 t...

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Bibliographic Details
Main Authors: O. Voitovych, A. Zatserklyana, G. Rudnev, D. Khalameida, G. Khlopov, S. Khomenko
Format: Article
Language:English
Published: Akademperiodyka 2015-06-01
Series:Радиофизика и электроника
Subjects:
Online Access:http://re-journal.org.ua/sites/default/files/file_attach/2015-2/7.pdf
Description
Summary: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.
ISSN:1028-821X
2415-3400