1. Laboratory of Electric Mechatronic and Signal Processing, Department of Electric and Telecommunication Engineering, National Advanced School of Engineering University of Yaoundé I Yaoundé Cameroon
2. Department of Meteorology, Climatology, Hydrology and Soil Sciences, National Advanced School of Engineering University of Maroua Maroua Cameroon
3. LEMAP, Department of Physics, Faculty of Science University of Yaoundé I Yaoundé Cameroon
4. Faculty of Science University of Dschang Dschang Cameroon
5. Faculty of Agronomy and Agricultural Sciences, School of Wood, Water and Natural Resources University of Dschang Ebolowa Cameroon