Volume 1, Issue 4, November 2016, Page: 76-81
Determination of Refractivity Gradient and Geoclimatic Factor Using Radiosonde Data and Inverse Distance Weighting Spatial Interpolation for Missing Data
Iniobong Jackson Etokebe, Department of Electrical/Electronic and Computer Engineering, University of Uyo, Akwa Ibom, Nigeria
Mfonobong Charles Uko, Department of Electrical/Electronic and Computer Engineering, University of Uyo, Akwa Ibom, Nigeria
Iwuchukwu Uchechi Chinwe, Department of Electrical & Electronic Engineering, Federal University of Technology, Owerri (FUTO), Nigeria
Received: Oct. 16, 2016;       Accepted: Nov. 17, 2016;       Published: Jan. 12, 2017
DOI: 10.11648/j.ijssam.20160104.17      View  2899      Downloads  63
Abstract
In this paper, point refractivity gradient and geoclimatic factor are determined using radiosonde data on meteorological parameters obtained in Calabar, Nigeria. The meteorological parameters used are air temperature, pressure and humidity obtained from the radiosonde data archive of Nigerian Meteorological Agency. In view of the poor spatial resolution of radiosonde data, inverse distance weighting spatial interpolation technique is used to obtain the missing data at certain height of interest in the study. The results obtained showed that the point refractivity gradient and geoclimatic factor showed monthly and seasonal variations. Specifically, Calabar has annual average Point Refractivity Gradient (dN) and Geoclimatic Factor (K) of -125.508 N-units/Km and 6.53762E-05 respectively. The largest dN value of -25.4683 N-units/Km occurred in May whereas the smallest value of -305.2692 N-units/Km occurred in November. Furthermore, there is higher value of point refractivity gradient in the rainy season than in the dry season whereas there is lower value of geoclimatic factor in the rainy season than in the dry season.
Keywords
Refractivity Gradient, Geoclimatic Factor, Inverse Distance Weighting Spatial Interpolation, Clear-Air Fading Mechanism, Multipath Fading, Spatial Interpolation
To cite this article
Iniobong Jackson Etokebe, Mfonobong Charles Uko, Iwuchukwu Uchechi Chinwe, Determination of Refractivity Gradient and Geoclimatic Factor Using Radiosonde Data and Inverse Distance Weighting Spatial Interpolation for Missing Data, International Journal of Systems Science and Applied Mathematics. Vol. 1, No. 4, 2016, pp. 76-81. doi: 10.11648/j.ijssam.20160104.17
Copyright
Copyright © 2016 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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