An Investigation of Minimum Information Requirements for an Unmanned Aircraft System Detect and Avoid Traffic Display
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2017-06-01
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Abstract:A study was conducted to support the development of Minimum Operational Performance Specifications for UAS Detect and Avoid traffic displays being developed by RTCA Special Committee 228. The study involved over 1,000 traffic encounters across 32 participants. Data collection began January 20th, 2016, and was completed on April 1st, 2016. The experiment tested four different display configurations. A baseline display , an indication of the Closest Point of Approach (CPA) between ownship and an intruder aircraft, avoidance area information indicating areas to avoid preventing a loss of well clear from another aircraft, and a banding information display indicating horizontal and vertical vectors to avoid preventing a loss of well clear. In addition,the experiment also manipulated whether the pilots had UAS experience or were only instrument-rated manned aircraft pilots, and the type of control station interface that was used. The results replicated the findings of other studies showing the benefits of banding information in addition to baseline information for a UAS detect and avoid traffic display. In addition, these benefits were seen across a more varied population of pilots than were looked at in previous studies as well as different control station interface designs than were used in previous studies, thus giving strong support for the decision made by the RTCA SC-228 committee to require banding information as part of the minimum requirements. The study also found strong support for the avoidance area (blob) information. Ramifications of this support are discussed.
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