[1] United Nations African Regional Centre for Space Science and Technology Education - English (UN-ARCSSTE-E), Obafemi Awolowo University Campus, Ile Ife, Nigeria
[2] National Institute for Geophysics and Volcanology (INGV), Rome,00143, Italy
[3] Institute for Space Science and Engineering, African University of Science and Technology, Abuja, Nigeria
[4] University of New Brunswick, Fredericton, Canada
[5] South African National Space Agency (SANSA), P.O Box 32, Hermanus,7200, South Africa
[6] Department of Physics and Electronics, Rhodes University, Makhanda,6140, South Africa
[7] The Abdus Salam International Centre for Theoretical Physics, Strada Costiera, 11, Trieste,I-34151, Italy