What is the definition of Mode S in relation to transponders?
Mode S transponders perform the same basic function as a traditional Mode A/C transponder and provides all the same data to the ground (and TCAS), however, the method by which these transponders are interrogated is much different. All so-called ATCRBS (Mode A/C) transponders reply when interrogated this happens when the beam of the interrogator dwells on the transponder. There is no selectivity between transponders they all reply. This can lead to saturation or garble when too many transponders attempt to reply to the same interrogation simultaneously. So a means of selectively interrogating specific transponders was needed. Mode S accomplishes just that. In fact, the S in Mode S stands for Select. Interrogators may now address their interrogations to specific transponders in their vicinity and no other transponder will reply. How does the Mode S Ground Station or TCAS know which address to interrogate for? All Mode S transponders squitter their unique, 24 bit, ICAO Mode S ID this addr
Mode S transponders perform the same basic function as a traditional Mode A/C transponder and provides all the same data to the ground (and TCAS), however, the method by which these transponders are interrogated is much different. All so-called ATCRBS (Mode A/C) transponders reply when interrogated this happens when the beam of the interrogator dwells on the transponder. There is no selectivity between transponders they all reply. This can lead to saturation or garble when too many transponders attempt to reply to the same interrogation simultaneously. So a means of selectively interrogating specific transponders was needed. Mode S accomplishes just that. In fact, the S in Mode S stands for Select . Interrogators may now address their interrogations to specific transponders in their vicinity and no other transponder will reply. How does the Mode S Ground Station or TCAS know which address to interrogate for? All Mode S transponders squitter their unique, 24 bit, ICAO Mode S ID this add
Answer Mode S transponders perform the same basic function as a traditional Mode A/C transponder and provides all the same data to the ground (and TCAS), however, the method by which these transponders are interrogated is much different. All so-called ATCRBS (Mode A/C) transponders reply when interrogated this happens when the beam of the interrogator dwells on the transponder. There is no selectivity between transponders they all reply. This can lead to saturation or garble when too many transponders attempt to reply to the same interrogation simultaneously. So a means of selectively interrogating specific transponders was needed. Mode S accomplishes just that. In fact, the S in Mode S stands for Select. Interrogators may now address their interrogations to specific transponders in their vicinity and no other transponder will reply. How does the Mode S Ground Station or TCAS know which address to interrogate for? All Mode S transponders squitter their unique, 24 bit, ICAO Mode S ID th
