EVALUATION OF GARBLED REPLIES FOR AIRCRAFTS INTERROGATED BY SSR SYSTEM

Abstract

In aviation, an undesirable phenomenon that can occur with increased airport traffic is garbling. The main problem is that if two aircraft are within a short critical distance to each other, the replay messages (response signals) can overlap. To better understand the garbling phenomenon by aviation students and engineers and to prevent the occurrence of this undesirable phenomenon that can lead to tragic events, we have modelled and simulated this phenomenon using an algorithm that statistically estimates the number of garbled replies (erroneous replay messages/ response signals) for several aircraft interrogated by a secondary surveillance radar.