Analysis of Real Airborne Collision Avoidance System Surveillance Parameters

A concept of a new AFIS tool for automated data record

“…Aircraft with the ADS-B OUT capability shall transmit at least 3 standard extended squitter messages when it is reported airborne (Aircraft Identification Squitter, Airborne Position Squitter, Airborne Velocity Squitter) and 2 standard extended squitter messages when it is reported on-ground (Aircraft Identification Squitter and Surface Position Squitter). [2,3] These extended squitter messages are distinguished by the Type Code, which is a 5-bit field placed in bits 33-37 of each extended squitter message. [3] The type codes for the abovementioned messages are listed in the following table.…”

“…[2,3] These extended squitter messages are distinguished by the Type Code, which is a 5-bit field placed in bits 33-37 of each extended squitter message. [3] The type codes for the abovementioned messages are listed in the following table.…”

“…[5,6,4] This information may be encoded in the Aircraft Identification Squitter; however, transponders should encode the aircraft registration in this extended squitter message only if a flight number as stated in a flight plan is not available. [3] Therefore, the AFIS officer would need to check and decide whether the encoded information is an aircraft registration or a flight number. If the aircraft is not equipped with an ADS-B OUT capable transponder, it is not possible to decode the aircraft registration as it is not encoded in any of the Mode S DF messages.…”