Journal ArticleDOI
Rain attenuation modeling from measurements of rain drop size distribution in the Indian region
TLDR
In this article, the measured rain drop size distribution (DSD) and the ITU-R model of rain rate distribution over the frequency range of 10-200 GHz at three locations in the Indian region, to indicate the variability in the rain attenuation pattern in the tropical region.Abstract:
The rain attenuation and attenuation distribution have been obtained using the measured rain drop size distribution (DSD) and the ITU-R model of rain rate distribution over the frequency range of 10-200 GHz at three locations in the Indian region, to indicate the variability in the rain attenuation pattern in the tropical region. The prevailing DSD in the tropical region can cause very significant variability in the rain attenuation distribution indicating the need for long term and extensive measurement of DSD in the tropical region.read more
Citations
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Journal ArticleDOI
Prediction of Rain Attenuation and Impact of Rain in Wave Propagation at Microwave Frequency for Tropical Region (Uttarakhand, India)
TL;DR: In this article, an exponential model has been used to determine the attenuation level for k-region (India) which can be used for region having similar condition and the analyzed predicted attenuation data have been compared with ITU-R measured rain attenuation, and the results will provide useful estimation of rainfall attenuation on microwave links in tropical regions that have similar conditions as (Almora) Uttarakhand region.
Journal ArticleDOI
RAIN ATTENUATION MODELING IN THE 10{100 GHz FREQUENCY USING DROP SIZE DISTRIBUTIONS FOR DIFFERENT CLIMATIC ZONES IN TROPICAL INDIA
TL;DR: In this article, the distribution of drop size is assumed to be lognormal to model the rain attenuation in the frequency range of 10{100GHz, assuming single scattering of spherical rain drops, and a comparison shows that signiflcant difierences between ITU-R model and DSD derived values occur at high frequency and at high rain rates for different regions.
Journal ArticleDOI
Effect of Atmospheric Parameters on Satellite Link
J. S. Mandeep,K. Tanaka +1 more
TL;DR: In this article, the authors investigated the impairment due to rainfall attenuation in satellite links operating in tropical and equatorial climates and showed that the logarithmic function with ground rain rate deviates at very high rain rate.
Journal ArticleDOI
Raindrop size distribution modeling for radio link design along the eastern coast of south africa
TL;DR: In this article, a study of the raindrop size distribution along the eastern coast of South Africa (Durban) is presented, where the best kernel estimator, which results in the lowest integral square error (ISE), is used to measure the closeness of the estimated lognormal and gamma pdf of rain drop size to the measured raindrop distribution.
Journal ArticleDOI
Determination of rain attenuation from electromagnetic scattering by spherical raindrops: Theory and experiment
M. O. Odedina,Thomas J. Afullo +1 more
TL;DR: In this article, the forward scattering amplitudes for the spherical raindrops are determined for all raindrop sizes at different frequencies by using the Mie scattering theory, and the real parts of the extinction cross sections are used to generate power law models at different frequency.
References
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Journal ArticleDOI
Three-parameter raindrop size distribution modelling at a tropical location
TL;DR: In this article, three-parameter distribution functions, gamma and lognormal, were used to describe the sizes of raindrops in Calcutta, and the three parameters for a drop size distribution were obtained by solving three nonlinear equations formed with three measurements, namely rain rate and rain attenuations at millimetre and optical wavelengths.
Rain drop size distribution model for Indian climate
Arun K Verma,K K Jha +1 more
TL;DR: In this paper, a RDSD model was developed based on distrometer data collected at Dehradun, India for estimating specific attenuation for accurate prediction of the limitations imposed by rain.
Journal ArticleDOI
Model for estimating rain attenuation at frequencies in range 6-30 GHz
TL;DR: In this article, the raindrop size distribution (RSD) for various types of rainfall over Guwahti, India is presented and the observed RSD parameters are compared with those given by other models.