Journal OACI

No. 1

At Memphis (Tennessee) International Airport, a conventional Mode-S secondary surveillance radar system is employed as a demonstrator "precision runway monitor (PRM)" using back-to-back antennas. Thus, the data update occurs every 2.4 seconds instead of 4.8 seconds. Developed by MIT's Lincoln Laboratory, this particular system has been in test operation since late 1988 and is in competition with a similar system using a circular phased-array antenna and advanced processing