Development of rain attenuation and rain rate maps for satellite communications system design in Greece

Papatsoris, A.D.; Polimeris, Konstantinos; Lazou, A.A.

doi:10.1109/aps.2008.4619005

Cited by 7 publications

(5 citation statements)

References 1 publication

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“…The development of rain-rate and rain-attenuation mapping has attracted a great deal of attention by many researchers -for instance, presenting the result of rain rate and attenuation in the form of mapping has earlier been carried out for USA (Dutton and Dougherty, 1979), Europe (Dutton and Dougherty, 1979;Emiliani et al, 2004), Malaysia (Chebil and Rahman, 1999), Greece (Papatsoris et al, 2008), Nigeria (Ajayi, 1996;Ojo et al, 2008Ojo et al, , 2009, and on a global scale by ITU (Crane and Dissanayake, 1997) among others. This section presents the most important results on rain rate and rain-induced attenuation at Ku and Ka downlink frequency bands for SA based on local climatological data.…”

Section: Development Of Rain-rate and Rain-attenuation Contour Maps Bmentioning

confidence: 99%

Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Ojo

Owolawi

2014

Advances in Space Research

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Section: Development Of Rain-rate and Rain-attenuation Contour Maps Bmentioning

confidence: 99%

Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Ojo

Owolawi

2014

Advances in Space Research

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“…Various studies on rainfall characteristic parameters modeling and analysis such as rain attenuation, rain drop diameter, raindrop size distribution, velocity and depth of fall utilising simulated and measured data have been reported in literature, but particularly at higher frequencies [15][16][17][18][19][20][21][22], Semi-Temperate [31], and Mediterranean [32][33][34]. However, a detailed clear-cut study on raindrop size rainfall distribution analysis and their influence on specific signal attenuation are mixing in typical Tropical climate region where this study is conducted.…”

Section: A Literature Review and Research Motivationmentioning

confidence: 99%

Tropical Rain Intensity Impact on Raindrop Diameter and Specific Signal Attenuation at Microwaves Communication Link

Isabona¹,

Ojochogwu²,

Odesanya³

2023

IJIGSP

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Realistic knowledge of rainfall characteristics and modeling parameters such as size, shape, and drop size distribution is essential in numerous areas of scientific, engineering, industrial and technological applications. Some key application areas include, but not limited to microphysics analysis of precipitation composition phenomenon, weather prediction, signal attenuations forecasting, signal processing, remote sensing, radar meteorology, stormwater management and cloud photo detection. In this contribution, the influence of rain intensity on raindrop diameter and specific attenuation in Lokoja, a typical climate region of Nigeria is investigated and reported. Three different rain rates classes obtained due to heavy rainfall depth, heavy rainfall depth, and heavy rainfall depth have been explored for the raindrop size distribution analysis. The three-parameter lognormal and Weibull models were utilised to estimate the influence of rain rates on the drop sizes and specific rainfall attenuation in the study location. For Lognormal model, the maximum raindrop concentration occurred approximately at diameter of 1 mm before showing downfall performance trends as the drop diameter increases. In the case of Weilbull model, the maximum raindrop concentration occurred at different drop diameter with the three rain rate classes, before showing downfall concentration trends with increasing rain drop diameter values. By means of the two models, the highest raindrops concentration values attained in correspondence with the specific rain attenuation were made by drop diameters not more than 2.5 mm. In terms of rain rate, specific attenuation and frequency connection, the results disclose that attenuation of propagated electromagnetic waves increases at increasing rainfall depth and increasing operating frequency bands. The results also disclose that the specific attenuation is directly proportional to the increase in rain intensity levels in correspondent with the operational frequency. As a case in point, at 4GHz frequency, the attenuation level of about 20 dB/km level is attained for mean, minimum and maximum rain rates of 29.12, 12.23 and 50.22 mm/hr, respectively. But as the frequency increased from 4GHz to 20GHz, the attenuation level almost doubles from 20 to 45dB/km at still same rain rates. The above performance is so, because at higher radio-microwave frequencies, the wavelength of the propagated electromagnetic waves approaches the mean diameter of the raindrop. The results display gradual increase in attenuation levels as the diameter rain drop sizes and intensity increases or become broader. The attenuation grows because the raindrops interfere, distort, absorb and scatter major portion of the microwave energy. However, the gradual trend in the attenuation level increase becomes slower and tending to logarithm stability at larger rain drop values. This may suggest that the attenuation level may come to equilibrium state at higher rain drop diameters. The resultant outcome of this work can assist microwaves comm...

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“…Total attenuation propagation loss statistics over Earth-satellite and terrestrial communication links are also fundamental in providing the necessary information for the effective design of such links. ITU-R P.618 [44] specifies that the relevant propagation parameters required to compute total attenuation loss also comprise individual attenuations. They are attenuations due to rain, atmospheric gases, cloud, free space, etc.…”

Section: Total Attenuation Propagation Lossmentioning

confidence: 99%

“…These regions comprise the tropical region [14-16,26-32], subtropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Medi- Due to some major propagation impairments in the atmosphere at different frequencies using measurement and simulated data, various attenuation studies have been reported for different regions. These regions comprise the tropical region [14][15][16][26][27][28][29][30][31][32], sub-tropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Mediterranean region [42][43][44], among others. However, clear, robust attenuation studies are lacking due to significant propagation impairments over the investigated environment, with a tropical wet and dry savanna climate.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Propagation Modelling for Terrestrial Radio Frequency Communication Links in a Tropical Wet and Dry Savanna Climate

Isabona

Imoize

Ojo³

et al. 2022

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Atmospheric impairment-induced attenuation is the prominent source of signal degradation in radio wave communication channels. The computation-based modeling of radio wave attenuation over the atmosphere is the stepwise application of relevant radio propagation models, data, and procedures to effectively and prognostically estimate the losses of the propagated radio signals that have been induced by atmospheric constituents. This contribution aims to perform a detailed prognostic evaluation of radio wave propagation attenuation due to rain, free space, gases, and cloud over the atmosphere at the ultra-high frequency band. This aim has been achieved by employing relevant empirical atmospheric data and suitable propagation models for robust prognostic modeling using experimental measurements. Additionally, the extrapolative attenuation estimation results and the performance analysis were accomplished by engaging different stepwise propagation models and computation parameters often utilized in Earth–satellite and terrestrial communications. Results indicate that steady attenuation loss levels rise with increasing signal carrier frequency where free space is more dominant. The attenuation levels attained due to rain, cloud, atmospheric gases, and free space are also dependent on droplet depths, sizes, composition, and statistical distribution. While moderate and heavy rain depths achieved 3 dB and 4 dB attenuations, the attenuation due to light rainfall attained a 2.5 dB level. The results also revealed that attenuation intensity levels induced by atmospheric gases and cloud effects are less than that of rain. The prognostic-based empirical attenuation modeling results can provide first-hand information to radio transmission engineers on link budgets concerning various atmospheric impairment effects during radio frequency network design, deployment, and management, essentially at the ultra-high frequency band.

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Development of rain attenuation and rain rate maps for satellite communications system design in Greece

Cited by 7 publications

References 1 publication

Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Development of one-minute rain-rate and rain-attenuation contour maps for satellite propagation system planning in a subtropical country: South Africa

Tropical Rain Intensity Impact on Raindrop Diameter and Specific Signal Attenuation at Microwaves Communication Link

Atmospheric Propagation Modelling for Terrestrial Radio Frequency Communication Links in a Tropical Wet and Dry Savanna Climate

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