1. a Department of Astronomy and Meteorology, Faculty of Science , Cairo University , Cairo, Egypt
2. b Department of Physics, Faculty of Science at Port Said , Suez Canal University , Port Said, Egypt
3. c Egyptian Meteorological Authority, Kubry El-Qubba , Cairo, Egypt
4. d Mines ParisTech, Centre for Energy and Processes, BP 207, 06904 Sophia Antipolis Cedex , France