International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2569

Full Length Research Paper

Geo-spatial distribution of radio refractivity and the influence of fade depth on microwave propagation signals over Nigeria

Olalekan Lawrence Ojo
  • Olalekan Lawrence Ojo
  • Department of Physics, University of Lagos, Yaba Akoka Lagos, Nigeria.
  • Google Scholar

  •  Received: 30 June 2023
  •  Published: 31 July 2023


Adediji AT, Ajewole MO, Falodun SE, Oladosu OR (2007). Radio refractivity measurement at 150 m altitude on TV tower in Akure, South-West Nigeria. Journal of Engineering and Applied Sciences 2(8):1308-1313.


Adediji AT, Ajewole MO, Falodun SE (2011). Distribution of radio refractivity gradient and effective earth radius factor (k-factor) over Akure South Western Nigeria. Journal of Atmospheric and Solar Terrestrial Physics. 73:2300-2304.


Adediji AT, Mandeep JS, Ismail M (2014). Meteorological Characterization of Effective Earth Radius Factor (k-Factor) for Wireless Radio Link over Akure, Nigeria. MAPAN-Journal of Metrology Society of India 29(2):131-141.


Adediji AT, Mahamod I, Mandeep JS (2014). Variation of radio field strength and radio horizon distance over three stations in Nigeria. Journal of Atmospheric and Solar Terrestrial Physics 109:1-6.


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Agunlejika O, Raji TI (2010). Empirical evaluation of wet -term of refractivity in NIGERIA. International Journal of Engineering and Applied Sciences 2(2):63-68.


Ashidi A, Ojo JS, Adediji AT, Ajewole MO (2020). Development and performance evaluation of tropospheric scintillation model on Ku-band satellite link over Akure, Nigeria. Advances in Space 67(5):1612-1622.


Asiyo MO, Afullo JO (2013). Statistical Estimation of Fade Depth and Outage Probability Due to Multipath Propagation in Southern Africa.Progress in Electromagnetics Research 46:251-274.


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Eruola AO, Makinde AA, Eruola GA, Ayoola KO (2021). Assessment of the Rainfall Exceedance in Nigeria. Nigerian Journal of Technology 40(4):751-761.


Falodun SE, Ajewole MO (2006). Radio refractivity index in the lowest 100 m layer of the troposphere in Akure, South-western Nigeria. Journal of Atmospheric and Solar-terrestrial Physics 68:236-243.


Falodun SE, Ojo JS, Aboyeji ST (2021). Modeling of atmospheric primary Radioclimatic variables in Nigeria for microwave radio propagation applications. SN Applied Sciences 3:67.


Falodun SE, Ojo JS, Kareem AI (2021). The Study of Atmospheric Stability Using Radio Refractivity Profiles over a Tropical Climate in Nigeria. MAPAN 36:751-762


Freeman RL (1997). Radio System Design for Telecommunications. John Wiley & Sons, ISBN :978-0-471-75713-9.


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Igwe KC, Adimula IA (2009). Variation of surface radio refractivity and radio refractive index gradients in the Sub-Sahel. Nig. Journal of Space Research 6:135-144.


ITU- Rec P.453-8, (2003).The radio refractive index: Its formula and refractivity data.


ITU-R P.530-14, (2012). Propagation data and prediction methods required for the design of terrestrial line-of-sight systems.


ITU-R P.453-11, (2015). Radio Refractive Index: its formula and refractivity data" Rec. P 453-11, International Telecommunication Union, Geneva (2015).


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Olla MO, Oluwafemi IB, Akinsanmi O, Femijemilohun OJ (2019): Fade Depth and Outage Probability Due to Multipath Propagation in Nigeria. Research Journal of AppliedSciences, Engineering and Technology 16(2):43-55.


Ojo JS (2011): "Rain rate statistics and fade distribution at Ka-and Ku band frequencies for microwave propagation in tropical locations" The Nigerian Journal of Space Research 10:72-80.


Ojo JS (2017). Geo-spatial distribution of cloud cover and influence of cloud induced attenuation and noise temperature on satellite signal propagation over Nigeria. Advances in Space Research 59:2611-2622


Ojo JS, Ajewole MO, Obagunle RG (2017). Performance of Site Diversity Fade Mitigation over Earth to Space Propagation Link using Rain Cell Measurements in a Tropical Nigeria- IET Microwave, Antenna and propagation. 11(15):2260-2266.


Ojo OL, Ajewole MO, Adediji AT, Ojo JS (2014). Microwave Anomalous Propagation Conditions in the First 100-m Altitude in a Tropical Location. Journal of Microwave Power and Electromagnetic Energy. 48(2):131-137.


Ojo OL, Ojo JS (2018). Analysis of Clear Air Effects: Implication on Microwave Radio Systems in Nigeria. Advances in Research 14(5):1-8.


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Olsen RL, Tjelta (1999). Worldwide techniques for predicting the multipath fading distribution on terrestrial LOS links: Background and results of tests. IEEE Transactions on Antennas and Propagation, 47(1):157-170


Olsen RL, Tjelta T, Martin L, Segal B (2003). Worldwide techniques for predicting the multipath fading distribution on terrestrial LOS links: Comparison with regional techniques. IEEE Transactions on Antennas and Propagation 51(1):23-30


Oyedum OD (2012). Duct-Induced terrestrial microwave link degradation in Nigeria: Minimization factors, India Journal of Radio and Space Physics 41:339-347.