Physics
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jastp..73.2300a&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 73, Issue 16, p. 2300-2304.
Physics
Scientific paper
Refractivity gradient and k-factor variations, based on measurements of atmospheric pressure, temperature and relative humidity made in Akure North (7.15°N, 5.12°E), South Western Nigeria, is reported. The measurement was made using wireless weather stations (Integrated Sensor Suite, ISS) positioned at five different height levels beginning from the ground surface and at intervals of 50 m to a height of 200 m on a 220 m idled TV tower. The study utilised 2 years of meteorological data measured from January 2007 to December 2008 to calculate refractivity, its gradient and the effective Earth radius factor (k-factor). From the results, refractivity values were observed to be generally high during the rainy season (April-October) and the values decreased with increasing altitude. The average refractivity gradient was -52.8 N-units/km and the average value of k-factor is 1.51 for the 2 year period of this report.
Adediji A. T.
Ajewole M. O.
Falodun S. E.
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