Before revision: Unmanned Aircraft Systems (UAS) are being increasingly used in delivery, infrastructure surveillance, fire-fighting, and agriculture. According to the Federal Aviation Administration (FAA), the number of active small commercial unmanned aircraft is going to grow from 385K in 2019 to 828K by 2024. UAS traffic management (UTM) system for low-altitude airspace is therefore immediately necessary for its safe and high-density use.
After revision: Unmanned Aircraft Systems (UAS) traffic management system (UTM) system for low-altitude airspace is therefore immediately necessary for its safe and high-density use.