Before 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
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 CaliforniaAutomated Radar Terminal System (). , Chicago, Washington DC area, Denver, St Louis, Minneapolis and San Francisco area) within the US