The Autonomous Airspace Awareness System (A3S) fuses radar and other sensors with edge AI to provide real-time detection and alerting capabilities in any environment. A3S actively scans its surroundings 20 times per second to detect, track, and alert operators to potential hazards like aircraft and drones. Whether mounted on the ground, on a vehicle, or on a drone, onboard AI removes human factors and data link risks in the decision-making cycle, offering all-weather monitoring and safety during missions. Autonomy enables rapid scaling of data collection, including airspace awareness, networked in real time.