首页    期刊浏览 2024年12月16日 星期一
登录注册

文章基本信息

  • 标题:Meteorological Models for Determination of Surface Radio Refractivity over Nigeria
  • 本地全文:下载
  • 作者:O. O. Ajileye ; O. S. Popoola ; F. F. Kayode
  • 期刊名称:Current Journal of Applied Science and Technology
  • 印刷版ISSN:2457-1024
  • 出版年度:2019
  • 卷号:36
  • 期号:3
  • 页码:1-15
  • DOI:10.9734/cjast/2019/v36i330235
  • 语种:English
  • 出版社:Sciencedomain International
  • 摘要:Previous studies showed that linear meteorological expressions obtained were localized and could not be generally applied. It is therefore required that more locations should be investigated to deduce new linear meteorological models best suitable for estimation of surface refractivity. Surface meteorological data, including pressure, temperature and relative humidity, was downloaded from Modern-Era Retrospective analysis for Research and Application (MERRA - 2) for six locations defined by different climatic conditions over Nigeria, namely Yenagoa, Abakaliki, Ibadan, Anyigba, Jalingo and Sokoto for a period of 40 years partitioned into two periods of 20 years each. The 1979 – 1998 dataset of atmospheric temperature, T (K), atmospheric pressure, P (hPa) and relative humidity, Rh (%) were extracted using text import wizard to calculate surface refractivity using existing model (Nitu-r). Regression analysis was carried out to obtain new linear meteorological expressions as function of temperature (Nt), relative humidity (Nrh), and combination of relative humidity and temperature (Nrh,t). The new expressions were tested using 1999 – 2018 meteorological dataset and the results of surface refractivity from the new linear expressions were compared with values from existing equations.
  • 关键词:Radio refractivity;meteorological;atmospheric temperature;weather variation
国家哲学社会科学文献中心版权所有