Sulungu, Emmanuel D, Christian BS Uiso, and Patrick Sibanda. “Total Electron Content Derived from Global Positioning System During Solar Maximum of 2012-2013 over the Eastern Part of the African Sector”. Tanzania Journal of Science 44, no. 1 (May 22, 2021): 62–74. Accessed April 29, 2024. https://tjs.udsm.ac.tz/index.php/tjs/article/view/679.