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Home  >  Volume 46 (May, 2018)

39. AN ASSESSMENT OF COVERAGE AREAS OF SOME AM RADIO TRANSMITTERS IN NIGERIA by R. A. Adenodi Volume 46 (May, 2018 Issue), pp287 –292
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AN ASSESSMENT OF COVERAGE AREAS OF SOME AM RADIO TRANSMITTERS IN NIGERIA

R. A. Adenodi 

Department of Physics, Adeyemi College of Education, Ondo.

Abstract

This study presents the result of the assessment of the useful coverage areas of some amplitude modulated (AM) transmitters over Nigeria landmass and the investigation of some factors impairing the signal integrity. This is motivated by the decline in the number of AM radio transmitters operating in Nigeria. Electric field strengths of the radio signals were measured along some routes around the transmitters during the rainy and dry seasons. The results obtained were interpolated to generate primary, secondary and fringe coverage areas but only the secondary coverage was geo-referenced on the maps of the owner states because it is the region where the signals are useful. The influences of ambient radio noise, seasonal variation, distance from transmitter, vegetation absorption, ground conductivity and antenna height on the service coverage were deduced. Results reveal that the percentage of landmass of the State outside useful service coverage within the State is greater for all the station except around Voice of Ekiti and Kano radios.

 

Keywords: coverage areas, radio noise, vegetation absorption, electric field strength. 

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