AUTOMATIC DEPENDENT SURVEILLANCE - BROADCAST FOR SURVEILLANCE OF UNMANNED AIRCRAFT SYSTEM

Unmanned Aircraft System (UAS) must fly only with IFR (Instrument Flight Rule), not with VFR (Visual Flight Rule). Therefore, air surveillance systems such as radar are very important. However, the radar provides aircrafts position every 5 similar to 10 seconds, also if the aircrafts size is small, it is difficult to obtain the aircrafts position. Automatic Dependent Surveillance - Broadcast (ADS-B) is a new technology that is redefining the paradigm of communications, navigation, and surveillance in air traffic management today. ADS-B allows UAS pilots and air traffic controllers to see and control aircraft with more precision than before. According to recent studies, the position accuracy of conventional radar is up to 600 ft. However, ADS-B achieves a position accuracy of around 100 ft. Also, the ADS-B provides aircrafts position every 1 second. To enhance the position accuracy of ADS-B, an improved aircraft tracking method is proposed. The method can not only improve the aircraft tracking performance but also track aircraft continually when the aircraft position data losses occur.