The AN/UPX-43 is a Mark XIIA, monopulse and AIMS certified IFF interrogator designed for command and control. It enables air traffic controllers and air defenders to identify military and civilian aircraft, verify forces as friendly and determine their bearing and range. The AN/UPX-43 also provides multi-channel Automatic Dependent Surveillance-Broadcast (ADS-B) and has been deployed in airborne, shipboard and ground-based environments. The system complies with all U.S. and international specifications that define interrogator modes, performance, control, reporting and interface. To easily introduce performance upgrades, the system uses common module hardware and software for the detection, interrogation, identification, tracking and data extraction of small targets in severe environments.