Results 221 to 230 of about 4,079 (261)

Rain Attenuation Studies

1973
Abstract : The statistical properties of rain attenuation which dominate propogation at frequencies above 10 GHz are required for planning radio systems at these frequencies. These properties are studied for three frequencies, 11.2, 12.7 and 18.76 GHz and various link lengths, 2.5, 5, 7.5, 10, 12.5 and 15 mi at six locations in Canada.
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Rain attenuation measurements in Malaysia

2015 1st URSI Atlantic Radio Science Conference (URSI AT-RASC), 2015
Within a research programme dealing with the development of a 5.8 GHz link to be used as redundancy for a 26 GHz terrestrial point-to-point microwave link in the equatorial region, two problems are discussed in this paper. a) Drop size distribution (DSD) and the associated specific rain attenuation and b) Frequency scaling of rain attenuation ...
Kesavan Ulaganathen, Mauro S. Assis
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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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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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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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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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Elevation Scaling of Rain Attenuation Time Series

2019 URSI Asia-Pacific Radio Science Conference (AP-RASC), 2019
In satellite links, the variations in the elevation angle have a strong impact on the magnitude of the attenuation induced by rain because the path-length across precipitation increases with the decrease in the elevation. In particular, it is definitely challenging to identify of a proper way to scale the instantaneous values of rain attenuation with ...
Tomaz L. M., Capsoni C., Luini L.
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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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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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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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