The joint radar evaluation and optimization team composed of the 84th Radar Evaluation Squadron radar team and a Federal Aviation Administration member, tests the Air Route Surveillance Radar system version 4, or ARSR-4, long-range radar, Paso Robles, Calif., Aug. 24, 2021. The 84th Radar Evaluation Squadron at Hill Air Force Base, Utah, monitors, evaluates, optimizes, and integrates fixed and long-range radars for the operational and federal communities, providing data analysis and unique radar forensics to ensure controllers have reliable and accurate sensor information to execute command and control. (U.S. Air Force photo by Deb Henley)