Cloud attenuation modelling for satellite network links performance improvement

2nd International Conference on Science and Sustainable Development "The Role of Science in Novel Research and Advances in Technology"

自然科学;经济学

Adewusi, O.M.^2 ; Omotosho, T.V.^1 ; Akinyemi, M.L.^1 ; Akinwumi, S.A.^1 ; Ometan, O.O.^2

Department of Physics, College of Science and Technology, Covenant University, PMB 1023, Ota, Ogun State, Nigeria^1

Department of Physics, Lagos State University, Ojo, Lagos state, Nigeria^2

关键词: Attenuation distributions;    Designed experiments;    Initial and boundary conditions;    Numerical representation;    Performance improvements;    Satellites application;    Services availability;    Simulation equations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/173/1/012013/pdf
DOI  :  10.1088/1755-1315/173/1/012013

学科分类：自然科学（综合）

来源: IOP

【 摘 要 】

All local climate zones need to develop relevant climatic models such as cloud attenuation model which can serve as correlative resources to global satellites applications and a means of determining local link margins for satellite networks services in localities. Effects of suspended water droplets (SWD) and suspended ice crystals (SIC) which constitute clouds are major concern in the design and successful operation of satellite communication system at frequencies above 3GHz because the hydrometeors reduces the services availability critically as frequency increases. This work is a review of cloud attenuation modelling, using as a case study typical research work been carried out, to develop cloud attenuation model for tropical Ota (6.7oN, 3.23oE), southwest Nigeria. Cloud attenuation modelling for a station involve obtaining clouds parametric system equation from their numerical representations, taking into consideration the climatic initial and boundary conditions. The numerical representations are collected climatological and radiometric data, derived from well-designed experiments in which cloud parameters measurements are carried out using radiances change measured by satellites and visual observations from the surface station(s) on land and ships in the ocean. The on-going research work begin with the study of performance of eight foundation cloud models at the station, through their detailed evaluation from cloud cover data and radiosonde data analysis, followed by analysis of collected over three years spectrum analyser signal attenuation data. Then modelling analysis of the station spectrum analyser data collected at computed elevation angle 56.18o to Astra 2(E-G) Satellite located at 28.2oE, which involve comparisons of the derived attenuation distribution curves, both of the spectrum analyser data and those of the existing cloud models for the station, with the derived attenuation distribution curves of output data generated by each run session of the station simulation equation program. The general representation of the station cloud attenuation model is stated and the specific model equation is been worked on.