Variation of radio field strength and radio horizon distance over three stations in Nigeria

A. T. Adediji, Mahamod Ismail, Mandeep Singh Jit Singh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this work, we present seasonal results of radio field strength and radio horizon distance derived from the computation of surface refractivity through in-situ measurement of temperature, relative humidity and pressure across three stations (Akure, Minna and Enugu) in Nigeria. The measurements of the tropospheric parameters were made using a Davis Wireless Weather Station (Integrated Sensor Suite, ISS) installed on the ground surface at each of the stations. The study utilized data for two years of measurement (January 2008-December 2009). Results show that the values of surface refractivity were low during the dry season months and high during the wet season months. The lowest values of 323, 313 and 281. N-units were observed in February for Akure, Enugu and Minna respectively, while maximum values of 372, 375 and 365. N-units were observed in September, October and August for the respective locations. Also, the average value of field strength variability was found to be 6.67, 5.62 and 7.48 for Akure, Enugu and Minna respectively.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume109
DOIs
Publication statusPublished - Dec 2013

Fingerprint

radio horizons
Nigeria
horizon
field strength
stations
radio
refractivity
weather stations
weather station
in situ measurement
wet season
humidity
dry season
relative humidity
sensor
sensors
station
temperature

Keywords

  • Clear-air propagation
  • Radio field strength
  • Radio horizon distance
  • Radio refractivity

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science
  • Atmospheric Science

Cite this

Variation of radio field strength and radio horizon distance over three stations in Nigeria. / Adediji, A. T.; Ismail, Mahamod; Jit Singh, Mandeep Singh.

In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 109, 12.2013, p. 1-6.

Research output: Contribution to journalArticle

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N2 - In this work, we present seasonal results of radio field strength and radio horizon distance derived from the computation of surface refractivity through in-situ measurement of temperature, relative humidity and pressure across three stations (Akure, Minna and Enugu) in Nigeria. The measurements of the tropospheric parameters were made using a Davis Wireless Weather Station (Integrated Sensor Suite, ISS) installed on the ground surface at each of the stations. The study utilized data for two years of measurement (January 2008-December 2009). Results show that the values of surface refractivity were low during the dry season months and high during the wet season months. The lowest values of 323, 313 and 281. N-units were observed in February for Akure, Enugu and Minna respectively, while maximum values of 372, 375 and 365. N-units were observed in September, October and August for the respective locations. Also, the average value of field strength variability was found to be 6.67, 5.62 and 7.48 for Akure, Enugu and Minna respectively.

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