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Rain attenuation is a major challenge to microwave satellite communication especially at frequencies above 10 GHz, causing unavailability of signals most of the time. Rain attenuation predictions have become one of the vital considerations while setting up a satellite communication link. In this study, rain attenuation models, cumulative distribution curves and other analytical tools for successful prediction of rain attenuation are presented. A three year Rain rate data was obtained from the Nigeria Meteorological Agency (NIMET) database in addition to experimental data. Of the three prediction models used in the study, Ajayi model gave the range of values closest to the experimental data. A correctional factor was determined as 1.0988 and used to modify the Ajayi model. This modification to Ajayi’s model enabled its rain attenuation values conform more closely to the experimental result.
Wydawca
Rocznik
Tom
Strony
1--11
Opis fizyczny
Bibliogr. 20 poz., fig., tab.
Twórcy
autor
- Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B. 1526, Owerri, Imo State, Nigeria
autor
- Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B. 1526, Owerri, Imo State, Nigeria
autor
- Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B. 1526, Owerri, Imo State, Nigeria
autor
- Electrical and Electronic Engineering, Federal University of Technology Owerri, P.M.B. 1526, Owerri, Imo State, Nigeria
Bibliografia
- 1. Stallins W., Data and Computer Communications. Upper Saddle River, New Jersey, United States, Pearson prentice hall, 2007.
- 2. Laplante P.A., IEEE Electrical Engineering dictionary, N-W Boca Raton, CRC press ILC, 2000.
- 3. Rain Fade. Retrieved from http://en.wikipedia.org/ wiki/Rain_fade
- 4. Bryant H., Adinula I., Riva C. and Brussand G., Rain Attenuation Statistic from Rain Cell Diameters, and Heights. Int. J. Satell. Commun., 19, 2001, 263-283.
- 5. Mc Cormick K.S., Rain Attenuation Measurements in South East Asia. Moscow, Dompars, June 1994.
- 6. Ajayi G.O., Rain intensity and Randrop Size Measurement in Nigeria. Seminar on Radioware propagation in Tropical Regions, Trieste (Italy), 1993.
- 7. Propagation in non Lonized media. CCIR, Vol. V, Geneva 1990.
- 8. Barclay P.A., Benett J.A. and Boston R.C., Properties of Rain for Microwave Propagation Studies. Report from the Electrical Engineering Department, School of Engineering, Monash University, Melbourne (Australia), 1978.
- 9. Akeyama A., Morita K., 11 and 18 GHz Radiowave Attenuation due to Precipitation on a Slant Path. IEEE Transaction Antennas and Propagation, Vol. AP-28(4), 1980, 580-585.
- 10. Moupfouma F.L, Martin N., Rain Structure on Attenuation due to Precipitation based on Measurement in Tropical Zone. 3-7 December, 1990.
- 11. Moupfouma F., Rainfall Rate Cumulative Distribution Modelling for the Determination of Rain Attenuation Statistics in Terrestrial and Satellite Radio Links in Tropical areas. Seminar on Radiowave Propagation in Tropical Regions, Triete (Italy), 1993.
- 12. Facts about Rain Fade and Satellites. http://www. phonetvinternet.com
- 13. Laws J.O. and Parsons D.A., The Relation of Raindrop sizes to Intensity. Trans Amer. 138 Geophys. Union, Vol. 24, 1943, 432-460.
- 14. Marshall J.S. and Palmer W.M.K. The Distribution of Raindrops with size. Journal of Meteorology, Vol. 5, 1948, 165-166.
- 15. Joss J., Thams J.C. and Waldvogel A., The Variation of Raindrop Size Distribution at Lorcano. Switzerland, Proc. Int. Conf, on Cloud Physics Toronto (Canada), 1968, 369-373.
- 16. Ajewole M.O., Scattering and Attenuation of Centimeter and Millimeter Radio Signals by Tropical Rainfall. Ph.D thesis, Federal University of Technology Akure Nigeria (unpublished), 1997.
- 17. Availability. Retrieved from http://en.wikipedia. org/wiki/Availability
- 18. Ojo J.S. and Ajewole M.O., Rain Rate and Rain Attenuation Prediction for Satellite Communication in Ku and Ka bands over Nigeria. Progress in Electromagnetic Research B, Vol. 5, 2008, 207–223.
- 19. Ajayi G.O., Slant Path Rain Attenuation measurement in Africa. Seminar on Radiowave Propagation in Tropical Regions, Trieste (Italy), 1993.
- 20. Alnutt J.E. and Rogers D.V., The INTELSAT Slant Path Radiowave Propagation Experiment in the Tropical Regions. Int. J. Satel. Commun., 8(3), 1990.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-69b97518-0d69-47d9-ba57-48db194dc801