Nathaniel, Ekong, Jewel Thomas, and samuel Akpan. “Analysis of the Sunset Equatorial Ionosphere Using Absorption Data”. IJRDO-Journal of Applied Science 6, no. 7 (July 19, 2020): 01-10. Accessed December 23, 2024. http://cpcontacts.ijrdo.org/index.php/as/article/view/3759.