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Ionosphere layer is very important to the communication system. In Malaysia the ionosphere layer is unique because the location is near the equator where it exposed more ultraviolet radiation (UV) compared to other region. This project focuses on the determination optimized ionospheric layers for TEC measurements at equatorial region. The main parameter in this project is Total Electron Content (TEC) with elevation angle of satellite between 50 to 85 degrees. Since these satellites are in different parts of the sky and the electron content in the ionosphere varies both spatially (track) and temporally (time), the Ionospheric Pierce Point (IPP) altitude plays an important role in converting the vertical TEC from the measured slant TEC. The TEC computed from the Global Positioning System (GPS) data for different altitudes ranging from 50 km to 750km. The data from GPS dual frequency which are in Receiver …