Development autotracking antenna control using stepper motor hybrid 2 phase

The purpose of this paper is to design a hardware and software auto-tracking antenna using a stepper motor as a 2 axis drive system based on azimuth angle input data. This paper presents a precision antenna tracking system for Low Earth Orbit satellites. The software and hardware interface has been built for orbit determination based using the orbital element from NORAD (North American Aerospace Defense). The use of a hybrid stepper motor 2 phase design is required to obtain a reliable antenna system with improved accuracy. The accuracy of this standard stepper motor is 1.8/step. J2 orbit perturbation model used in this system such as epoch time, inclination, RAAN, Eccentricity, AO Perigee, M Anomaly, M Motion as well as latitude and longitude information and satellite altitude have been considered for satellites trajectory determination. The result of this study is software and hardware auto-tracking. Using a parabolic dish, the antenna can automatically direct to receive signals from LAPAN-A1, DFS, and IRS satellites. In general, this system can track the satellite movement.