Abstract
The SSR Mode S technology is currently one of the major means of surveillance in ATM. Addressed surveillance enables the elicitation of replies from Mode S transponder on board of an aircraft containing different flight information in the so-called BDS registers. The type of BDS register as well as its content is characterised by a number of the BDS registers which is determined according to SSR interrogation by default. The study deals with the development of a heuristic algorithm for identification of a particular BDS register with the assumption that the radar query is unknown. A BDS number is assigned to the appropriate message on the basis of the unique bit sequences and other criteria. The algorithm provides the opportunity to obtain various flight data from the aircraft by only receiving addressed surveillance replies on 1090 MHz frequency.
Highlights
SSR Mode S addressed surveillance is being used across Europe and other regions with high traffic density to ensure supplementary information which exceeds ATM data and is suitable for ATS
There is an assumption for the system functionality: both subjects shall be equipped with corresponding Mode S equipment, which consists of the SSR Mode S interrogator and the aircraft SSR Mode S transponder
A wrong assignment is considered to be a different BDS number assigned to the known BDS register by the program
Summary
The category with downlink format 20 and 21 is represented by long interrogation and replies which contain the BDS (Comm-B Data Selector) register, providing Comm-B is considered a 112-bit reply containing the 56-bit message field. This field is used by the downlink standard length message, ground-initiated and broadcast protocols [2]. The BDS register represents the 56-bit MB part of the received message, which may contain different information from real operation depending on a BDS register number, for example, velocity, heading, meteorological information, etc. The BDS register represents the 56-bit MB part of the received message, which may contain different information from real operation depending on a BDS register number, for example, velocity, heading, meteorological information, etc. [4]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
