Human-in-the-loop experimental research for detect and avoid

• Overview of HITL DAA research and development work conducted at NASA Langley Research Center in support of the UAS in the NAS project • Three HITL experiments, CAS-1 and CAS-2 and CASSAT were briefly described, all part of the research plan designed to address interoperability and acceptability questions associated with the integration of UAS with manned aircraft operations in non-segregated airspace • Next steps in the research plan will address the impact of imperfect surveillance on SS algorithm performance and pilot's acceptability • Much research remains to be done to develop and validate the technology and operations needed for UAS integration without affecting the safety of the NAS.