Results 271 to 280 of about 7,241 (305)

Rain Attenuation Analysis

1999
This paper present analysis of rain effects on radio propagation. Special emphasis is given on rain attenuation calculation. An alternative method for calculating specific rain attenuation coefficients based on computer simulation is also proposed. This method is very straightforward, easy to use and well adapted for terrestrial and space link design ...
Majurec, Ninoslav, Brajan, Berislav, Tabaković, Željko   +2 more
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The prediction of rain attenuation statistics

Annales des Télécommunications, 1980
The prediction of rain attenuation statistics is a question of meteorology and probability. Therefore, the possible accuracy of these predictions depends on the knowledge of meteorological mechanisms and data as well as on the statistical uncertainty due to the stochastic nature of meteorological events. Attenuations exceeded for less than 0.1 % of the
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Radar Reflectivity and Attenuation of Rain

Journal of Applied Meteorology, 1963
Abstract The radar reflectivity and attenuation of rain are computed for various empirical drop-size distributions using more accurate and systematic calculations of the back-scatter and attenuation cross sections from Mie theory. Reflectivity-rainfall (Z-R) relations for 3.2 to 10 cm, incorporating deviations from the Rayleigh theory, are found to be ...
Raymond Wexler, David Atlas
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Severe Cause of Cloud Attenuation and Rain Attenuation on Space Communication Link at Millimetre Band and Differentiation between Rain Attenuation and Cloud Attenuation

2017 IEEE 7th International Advance Computing Conference (IACC), 2017
Rain will be estimated with the formation of cloud consists of water droplets, at higher frequencies such as millimetre band, that experiences a signal degradation and signal reduction due to the cloud consists of water droplets. The atmospheric gases, clouds, rain, snow, fog, cloud droplets, noise, water vapour, hydrometers absorbs electromagnetic ...
Kandala Kalyana Srinivas, Teppala Venkata Ramana   +1 more
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Effects of Rain Attenuation on Satellite Video Transmission

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
Heavy convective rain events are often experienced in tropical countries such as Singapore. The operation of high-speed satellite transmission in the Ka-band is therefore susceptible to attenuation. We present the setup of a high-speed link via the WINDS satellite using an ultra small aperture terminals (USAT).
Yee Hui Lee, Stefan Winkler 0001
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Frequency scaling of rain attenuation

IEEE Transactions on Antennas and Propagation, 1977
A simple method of frequency scaling for rain attenuation is presented. This method includes a correction factor for rain inhomogeneity and takes into account the high correlation between peak rainfall rate and attenuation. The results are compared with Drufuca's empirical method.
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On the attenuation of sea waves by rain

Geophysical Fluid Dynamics, 1973
Abstract Some conflicting evidence on Reynolds' (1900) hypothesis that rain should attenuate any wave motion on the sea surface is discussed. It is concluded that rain drops ought to produce vortex rings in the sea which mix the water to a sufficient depth to affect most waves, as asserted by Reynolds.
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Statistical Behavior of Rain Attenuation*

Bell System Technical Journal, 1973
Thirty-one sets of experimental data on the statistics of microwave rain attenuation at frequencies above 10 GHz, in the U.S.A., England, Japan, Italy, and Canada, indicate that: (i) the distribution of rain attenuation α, in dB, is approximately lognormal with a standard deviation σ α of log 10 α ranging from 0.46 to 0.71 for earth-space paths, and ...
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Modeling of rain and slant path rain attenuation

2008
The adverse impact of rain on the earth-satellite communications in the region has not been well characterized due to the lack of measured data. In view of the rapid introduction of new business and personal communications networks, based on satellite constellation operation in Ku-band or higher band with low fade-margins, it is of pressing importance ...
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Rain Attenuation Prediction Methods

1986
The evaluation of the effects of rain on a satellite system design requires a detailed knowledge of the attenuation statistics for each ground terminal location at the specific frequency of interest. Direct long-term measurements of rain attenuation for all of the ground terminal locations in an operational network are not practical, therefore modeling
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