Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)

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Temporal Variations of Refractivity and Field Strength at some Locations in Nigeria

Authors
Modupe E. Sanyaolu1, *, Johnson O. Afape1, Olufemi O. Sanyaolu2, Alexandar A. Willoughby1
1Department of Physical Sciences, Redeemer’s University, Ede, Osun State, Nigeria
2Department of Mechanical Engineering, Redeemer’s University, Ede, Osun State, Nigeria
*Corresponding author. Email: sanyaolum@run.edu.ng
Corresponding Author
Modupe E. Sanyaolu
Available Online 4 February 2025.
DOI
10.2991/978-94-6463-644-4_11How to use a DOI?
Keywords
Distortion; Surface Refractivity; Radio Field Strength; Propagation Path
Abstract

Radio field strength is often degraded due to surface refractivity on communication links. Results from the computation of surface refractivity presented in this study are based on the collection of data of relative humidity, temperature, and pressure across three locations in Nigeria, namely, Ikeja (6,6018°N, 3.3515°E), Calabar (4.9757°N, 8.3417°E), and Kano (12.002°N, 8.5920°E). ERA5 (European Centre for Medium-Range Weather Forecasts) provided the two years (2019 and 2020) archived data used. In addition to having higher values in coastal locations than in inland regions, surface refractivity (Ns) values were also found to be low in the dry season and high in the rainy season. Ikeja, Calabar, and Kano had average Ns values of 413.308715, 410.81065, and 335.1383 N-units, respectively. Additionally, the average Field Strength Variations at each location is 13.258175 dB, 3.116676 dB, and 21.733525 dB, for Ikeja, Calabar, and Kano respectively. The FSV values fluctuated alongside the surface refractivity. The study shows a good correlation between the radio field strength and refractivity. This is result has provided important information for proper planning in the selected regions.

Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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Volume Title
Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)
Series
Advances in Physics Research
Publication Date
4 February 2025
ISBN
978-94-6463-644-4
ISSN
2352-541X
DOI
10.2991/978-94-6463-644-4_11How to use a DOI?
Copyright
© 2025 The Author(s)
Open Access
Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

Cite this article

risenwbib
TY  - CONF
AU  - Modupe E. Sanyaolu
AU  - Johnson O. Afape
AU  - Olufemi O. Sanyaolu
AU  - Alexandar A. Willoughby
PY  - 2025
DA  - 2025/02/04
TI  - Temporal Variations of Refractivity and Field Strength at some Locations in Nigeria
BT  - Proceedings of the 8th URSI-NG Annual Conference (URSI-NG 2024)
PB  - Atlantis Press
SP  - 114
EP  - 122
SN  - 2352-541X
UR  - https://doi.org/10.2991/978-94-6463-644-4_11
DO  - 10.2991/978-94-6463-644-4_11
ID  - Sanyaolu2025
ER  -