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Aerospace 2017, 4(3), 49; doi:10.3390/aerospace4030049

Analysis of Radar and ADS-B Influences on Aircraft Detect and Avoid (DAA) Systems

Department of Mechanical Engineering, University of North Dakota, Grand Forks, ND 58202, USA
Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH 43210, USA
Next-Generation Applied Research Lab, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA
Institute for Transportation Research and Education, North Carolina State University, Raleigh, NC 27695, USA
Department of Forest Engineering, Resources, and Management, Oregon State University, Corvallis, OR 97331, USA
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 19 July 2017 / Revised: 2 September 2017 / Accepted: 8 September 2017 / Published: 18 September 2017
(This article belongs to the Special Issue Radar and Aerospace)
View Full-Text   |   Download PDF [5101 KB, uploaded 18 September 2017]   |  


Detect and Avoid (DAA) systems are complex communication and locational technologies comprising multiple independent components. DAA technologies support communications between ground-based and space-based operations with aircraft. Both manned and unmanned aircraft systems (UAS) rely on DAA communication and location technologies for safe flight operations. We examined the occurrence and duration of communication losses between radar and automatic dependent surveillance–broadcast (ADS-B) systems with aircraft operating in proximate airspace using data collected during actual flight operations. Our objectives were to identify the number and duration of communication losses for both radar and ADS-B systems that occurred within a discrete time period. We also investigated whether other unique communication behavior and anomalies were occurring, such as reported elevation deviations. We found that loss of communication with both radar and ADS-B systems does occur, with variation in the length of communication losses. We also discovered that other unexpected behaviors were occurring with communications. Although our data were gathered from manned aircraft, there are also implications for UAS that are operating within active airspaces. We are unaware of any previously published work on occurrence and duration of communication losses between radar and ADS-B systems. View Full-Text
Keywords: radar; ADS-B; drop out; data anomaly; air traffic control; NextGen; Detect and Avoid radar; ADS-B; drop out; data anomaly; air traffic control; NextGen; Detect and Avoid

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Semke, W.; Allen, N.; Tabassum, A.; McCrink, M.; Moallemi, M.; Snyder, K.; Arnold, E.; Stott, D.; Wing, M.G. Analysis of Radar and ADS-B Influences on Aircraft Detect and Avoid (DAA) Systems. Aerospace 2017, 4, 49.

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