What is the transmission frequency of the interrogator in an IFF system?

The interrogator in an Identification Friend or Foe (IFF) system operates primarily at a transmission frequency of 1030 MHz. This frequency is fundamental within the IFF system as it allows the interrogator to send signals to the transponders on aircraft or other objects to determine their identity, helping to distinguish friendly units from potential threats. The choice of 1030 MHz is standardized within military specifications for effective communication and response times, ensuring that the system functions reliably under various operational environments. This frequency is crucial because it supports the proper interrogation and identification process within airspace management, contributing to tactical air operations and enhancing situational awareness.