PASSIVE SSR

摘要

SSRs (81, 82, 83) transmit interrogation signals to calibration aircrafts (A, B). By receiving the answer signals to the interrogation signals from the aircrafts (81, 82, 83), the transmission timings of the received interrogation signals and the face-to-face timing of an antenna are detected based on the response signals. Based on the transmission timings, the face-to-face timing, and the answer signals, the position of an arbitrary aircraft is determined.