排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
B.G. Ayantunji P.N. Okeke J.O. Urama 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2011
The seasonal variation of surface refractivity over Nigeria was studied using two years in-situ meteorological data from eight locations over Nigeria. The result shows that the surface refractivity generally has higher value during rainy season than dry season at all location studied. The results also show that the value of surface refractivity increases from arid region in the north to the coastal area in south. The results also show that local meteorology plays a very important role in refractivity variation. 相似文献
2.
Daniel Okoh Lee-Anne McKinnell Pierre Cilliers Pius Okeke 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》2013
This paper presents the development of a Total Electron Content (TEC) map for the Nigerian ionosphere. In this work, TEC measurements obtained from the AFRL-SCINDA GPS (Air Force Research Laboratory-Scintillation Network Decision Aid, Global Positioning System) equipment installed at Nsukka (6.87°N, 7.38°E) are used to adapt the International Reference Ionosphere (IRI) model for the Nigerian Ionosphere. The map is being developed as a computer program (implemented in the MATLAB programming language) that shows spatial and temporal representations of TEC for the Nigerian ionosphere. The method is aimed at showing how the IRI model can be used to estimate VTEC over wide areas by incorporating GPS measurements. This method is validated by using GPS VTEC data collected from a station in Ilorin (8.50°N, 4.55°E). 相似文献
1