A method and system that receives and processes ADS-B data from one or more aircraft is disclosed. The system may include one or more ground stations that receives data from one or more aircraft and converts the received aircraft ADS-B data to XML format, determines the lowest cost communication mode available, and transmits the XML data over TCP/IP to an aircraft data server. The aircraft data server receives the aircraft ADS-B data in XML format from the one or more ground stations, processes the received ADS-B data to extract aircraft data and eliminate duplicate aircraft data; determines aircraft data missing from the processed aircraft data, receives supplemental aircraft data from other sources to provide aircraft data missing from the processed aircraft data, and outputs the processed aircraft data and the received supplemental aircraft data to one or more processing devices for processing and display.