الفهرس | Only 14 pages are availabe for public view |
Abstract This thesis is devoted to investigate the effect of solar irradiation and solar wind forcing on thermospheric density with an aim of exploring the impact of Coronal Mass Ejections on thermospheric density and plasma drag and relationships between them by using different analytical and statistical methods. We have concerned with investigating the variations of Kp index due to changes in solar activity features during solar cycle 23 and investigating the seasonal distributions of Kp index and F10.7 during Solar Cycle 23. We also have addressed the perturbation forces on three LEO Satellites with different eccentricity and altitude by using atmosphere model NRLMSISE00. In this respect we deduce that solar activity influences the upper atmosphere through rapid geomagnetic disturbances |