North American Aerospace Defense Command (NORAD)
https://www.norad.mil/
Mar 29, 2021 . The 84th Radar Evaluation Squadron, headquartered at Hill Air Force Base, Utah, evaluated the Air Route Surveillance Radar system version four, or ARSR-4, on a mountain top in Paso Robles, California, Aug. 23 - Sept. 4.
DA: 2 PA: 79 MOZ Rank: 77