Anchorage Air Route Traffic Control Center (PAZA/ZAN) is located just outside the main gate of Joint Base Elmendorf-Richardson at 700 North Boniface Parkway in Anchorage, Alaska, United States. The Anchorage ARTCC is one of 22 Air Route Traffic Control Centers in the United States. Center breakdown Anchorage ARTCC (ZAN) is the northern, eastern, and westernmost center and is one of three designated oceanic centers. The Anchorage ARTCC has control responsibility for more than of airspace divided between three areas of specialization and 15 sectors. ZAN operates on two separate automation platforms, ATOP (Advanced Technologies & Oceanic Procedures) and MEARTS (Microprocessor En Route Automated Radar Tracking System)/FDP-2000 (Micro En Route Automated Radar Tracking System). The facility also makes use of other technology systems such as FDP2000, DOTS+, ANICS, ADS-B, ADS-C and Wide area multilateration (WAM). Some of the sectors cover extremely large geographic areas and on average use more communications frequencies per sector than any other facility. RADAR coverage is limited to 55-60% of the airspace. Automation systems MEARTS (Microprocessor En Route Automated Radar Tracking System) The Microprocessor-En Route Automated Radar Tracking System (MEARTS) is a radar processing system implemented with commercial off-the-shelf (COTS) equipment, for use in the Anchorage, Alaska Air Route Traffic Control Center (ARTCC) and Center Radar Approach Control (CERAPs) environments. It provides single sensor and a mosaic display of traffic and weather using long- and short-range radars and at Anchorage it processes and displays Automatic Dependent Surveillance-Broadcast (ADS-B) surveillance as well. The MEARTS interfaces with multiple types of displays, including the flat panel Display System Replacement (DSR)(modified). FDP2000 (Flight Data Processing 2000) The Flight Data Processing 2000 (FDP2000) system replaced the oceanic flight data processing capability provided by Offshore Computer System (OCS) at the Anchorage Air Route Traffic Control Center (ARTCC). FDP2000 provides new hardware and software with added capabilities. The added capabilities include winds aloft modeling for improved aircraft position extrapolation accuracy, and support of Air Traffic Services Inter-facility Data Communications Systems (AIDC) ground-to-ground data link with compatible Flight Information Regions (FIRs). The OCS software was re-hosted from the Hewlett-Packard (HP) 1000 platform to the HP 9000 platform. FDP2000 provides flight data to the Microprocessor-En Route Automated Radar Tracking System (Micro-EARTS) radar data processing system. FDP2000 also integrates the existing Controller Pilot Data Link Communications (CPDLC) functions for data link communications with Future Air Navigation System 1/A (FANS 1/A)-equipped aircraft. ATOP (Advanced Technologies and Oceanic Procedures)