Abstract: Visualization of the orbit motion of a satellite in space is an important step to carryout mission planning and design. In an environment of learning such visualization tools help the students to understand and appreciate the dynamical motion. The purpose of this study was to present, first, the simulation of the satellite orbit analysis based on data collected from NASA/Norad two line element files. The analysis includes orbit determination and prediction of satellite position/velocity, orbit eclipse and ground trace and so on. Second the application of this simulation to design the Low Earth Orbit (LEO) satellite power subsystem. The intention of this simulation was to create a Graphical User Interface (GUI) which consists of menus, push buttons, text boxes, plots and other interface devices that allow the GUI user to immediately see the impact of various changes.