Proceedings ArticleDOI
Rain Attenuation from Weibull Raindrop-Size Distribution
Matsuo Sekine,Toshimitsu Musha,Chii-Dong Chen +2 more
- Iss: 18, pp 423-428
TLDR
In this paper, the rain attenuation from 1 to 1000 GHz was calculated by using a Weibull distribution for raindrop-size using microwave experimental measurement data from 8 to 312.5 GHz.Abstract:
The rain attenuation from 1 to 1000 GHz was calculated by using a Weibull distribution for raindrop-size. The microwave experimental measurement data from 8 to 312.5 GHz were compared with our calculations. Especially, comparison between the submillimeter measurement and calculation at 312.5 GHz (0.96mm) was shown for the various rainfall rates. The empirical relation A = aRb between the specific attenuation A and the rainfall rate R was also found for a rain temperature of -10°C, 0°C and 20°C, and dependences of a and b on frequencies from 1 to 1000 GHz were tabulated.read more
Citations
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Journal ArticleDOI
Attenuation Measurements and Propagation Modeling in the W-Band
TL;DR: In this article, the propagation in the W-band is analyzed on the basis of two-year experimental measurements carried out in Madrid, Spain, on a commercial link working at 75 and 85 GHz.
Journal ArticleDOI
Rain Attenuation at 103 GHz in Millimeter Wave Ranges
T Utsunomiya,M. Sekine +1 more
TL;DR: In this paper, a millimeter wave propagation experiment at 103 GHz (2.9 mm) on a propagation path of 390 m was conducted and the results were compared with the rain attenuation calculations from the Marshall-Palmer, Best, Joss-Thomas-Waldvogel and Weibull distributions for raindrop-size.
Journal ArticleDOI
Rain Attenuation at Terahertz
TL;DR: Rain attenuation values were calculated using empirical raindrop-size distributions, and also calculated using a specific rain attenuation model for prediction methods recommended by ITU-R, and showed that the propagation experiment was in very good agreement with this calculation.
Journal ArticleDOI
Scattering of radiowaves by a melting layer of precipitation in backward and forward directions
TL;DR: In this paper, the authors derived the size distribution of the melting snow particles, the thickness of a melting layer, the density of a dry snow particle, and the average dielectric constant of melting snow particle.
Journal ArticleDOI
Backward and forward scattering by the melting layer composed of spheroidal hydrometeors at 5-100 GHz
TL;DR: In this article, the behavior of the differential reflectivity, specific attenuation, and specific phase shift due to a melting layer composed of oblate-spheroidal hydrometeors is analyzed.
References
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Journal ArticleDOI
The terminal velocity of fall for water droplets in stagnant air
Ross Gunn,Gilbert D. Kinzer +1 more
TL;DR: In this article, the terminal velocities for distilled water droplets falling through stagnant air are accurately determined using a new method employing electronic techniques, and the over-all accuracy of the massterminal-velocity measurements is better than 0.7 per cent.
Journal ArticleDOI
The relation of raindrop-size to intensity
J. Otis Laws,Donald A. Parsons +1 more
TL;DR: The applicability of such results to conditions of natural rainfall has been thrown in doubt as discussed by the authors, and the results have been found to be affected by the drop-size and velocity of the artificial rains applied.
Journal ArticleDOI
The aR b relation in the calculation of rain attenuation
R. Olsen,D. Rogers,D. Hodge +2 more
TL;DR: In this paper, the empirical relation A = aR^{b} between the specific attenuation A and the rain rate R is used in the calculation of rain attenuation statistics.
Journal ArticleDOI
Broadband Complex Refractive Indices of Ice and Water
TL;DR: A critical survey of the literature is presented and an empirical model of the complex refractive indices for ice and liquid water is constructed from this review.