Before revision: Two separate competeting systems are currently operating within the US, Common ARTS (Lockheed Martin) and STARS (Raytheon), with Common ARTS being the more robust system and operating at the busiest facilities ( NY, Dallas, Atlanta, Southern Cal, Chicago, Washington DC area, Denver, St Louis, Minneapolis and San Francisco area) within the US On the display side, the round radar is being replaced by computer-driven cathode ray tubes, which now are being replaced by modern LCD flat screens in enroute systems.
After revision: Two separate competing systems are currently operating within the US, Common ARTS (Lockheed Martin) and STARS (Raytheon), with Common ARTS operating at the busiest facilities ( NY, Dallas, Atlanta, Southern Cal, Chicago, Washington DC area, Denver, St Louis, Minneapolis and San Francisco area) within the US On the display side, the round radar is being replaced by computer-driven cathode ray tubes, which now are being replaced by modern LCD flat screens in enroute systems.