Analysis of ADS-B Trajectories in the Republic of Korea with DAA Well Clear Metrics

Currently, a team of researchers from leading Universities and Government funded research institutes in the Republic of Korea are working together to enable mixed operation of manned and civil unmanned aircraft in the Korean National Airspace by 2020. In this paper, impacts of the detection range and angle of a generic Detect-And-Avoid (DAA) system on DAA Well Clear (DWC) metrics are investigated. Recorded Automatic Dependent Surveillance-Broadcast (ADS-B) trajectory data within about 150 nautical miles from the Inha University are used, which includes Incheon International Airport (ICN) and Gimpo International Airport (GMP). Efforts are made to provide a guideline for acceptable detection range and detection angles with respect to the risk level that reflects the air traffic characteristics of the Republic of Korea. The analyses show that, with ±70° of detection azimuth, ±30° of detection elevation, and 56,000 ft of detection range, more than 99 % of the threats can be detected by either the ownship or the intruder.