ADS-B (Automatic Dependent Surveillance – Broadcast) helps aircraft operators sense and avoid possible collisions. ADS-B is mandated by the FAA for all aircraft in the U.S. National Airspace by 2020. Used now primarily on manned aircraft, miniaturizing the equipment was essential to make it useable for small drones. pingRX measures 32mm x 15mm x 3mm, which is a fraction of the size of earlier units. The small footprint and extremely low weight of pingRX results in greatly enhanced situational awareness with almost zero impact on payload and performance.