Flight guardian: A common avionics architecture for collision avoidance and safe emergency landing for unmanned aerial systems

Significant challenges facing widespread adoption of Civilian UAS: - Demonstration of at least ELOS to manned aircraft; What is ELOS? - Regulations that define the operational and technical requirements are not yet in place and thus UAS cannot be fully integrated into the NAS; Cost drivers in Civil UAS - Many civil UAS applications compete directly with existing conventional aircraft capability - For small-medium UAS, cost per flight hour needs to be <; O~$500.