1. Cooperative Information Network, NASRDA, PMB, 022, Obafemi Awolowo University, Ile-Ife, Nigeria
2. Atmospheric Physics Group, Department of Physics, Imo State University, Owerri, Nigeria
3. Department of Mathematics, Virginia Tech Institute, Blacksburg, VA, USA
4. Department of Mathematics, Obafemi Awolowo University, Ile-Ife, Nigeria
5. Department of Geology, Federal University of Technology, Owerri, Nigeria
6. Advanced Space Applications Laboratory, University of Uyo, Uyo, Nigeria
7. Regional Center for Space Science Technology Education in English, Obafemi Awolowo University, Ile-Ife, Nigeria