Abstract

We investigated longitudinal advancement of the peak Total Electron Content (TEC) within the equatorial anomaly region of Kenya, based on the data from the two Scintillation Network Decision Aid (SCINDA) Global Positioning System (GPS) receivers at Jomo Kenyatta University of Agriculture & Technology (JKUAT): latitude ?1.095, longitude 37.015, and at the University of Nairobi: latitude ?1.274, longitude 36.808; and the two Geographical Information System (GIS) stations at Malindi: latitude ?2.996, longitude 40.194, and at the Regional Center for Mapping of Resources for Development (RCMRD): latitude ?1.221, longitude 36.893. The retrieved archived data from these stations were for 17^th December 2009; and for 26^th, 27^th and 28^th August 2010 —just after the solar minimum period of 2008. They were subjected to analysis by the GPS-TEC analysis application software provided by Boston College Research Institute (USA). Results reveal that the peak TEC within the region of study occurs between 8 a.m. and 10 a.m. The Coastal region experiences peak TEC earlier than Nairobi region. Slight variations were also observed on the TEC plots from various stations. It can be concluded that the peak TEC advances westwards within the equatorial anomaly region; these variations are due to plasma bubbles that take place from the east to west within the equatorial region.

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