AN APPROACH TO ASSESS SAFETY CONSIDERING INTEGRITY OF DATA OF ADS-B BASED AERIAL SYSTEMS

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1 AN APPROACH TO ASSESS SAFETY CONSIDERING INTEGRITY OF DATA OF ADS-B BASED AERIAL SYSTEMS SITRAER (2014) XIII Air Transportation Symposium (2014) Daniel Baraldi Sesso Lucio Flavio Vismari João Batista Camargo Junior Safety Analysis Group (GAS) Computer and Digital Systems Engineering Department (PCS) School of Engineering (Escola Politécnica - Poli) University of São Paulo (USP) São Paulo, Brazil 1

2 Outline Safety Analysis Group Motivation Surveillance Technologies What is surveillance? ADS-B in Air Traffic Control Integrity of Data using ADS-B The RAIM Technique Safety Assessment Methodology References 2

3 Safety Analysis Group a Research Group at Computer and Digital Systems Engineering Department (PCS) in the School of Engineering at USP (Poli-USP). Academic Research and Consultancy Projects related to Computer-Based Dependable-Critical Systems (mainly Safety, Reliability and Availability) Our main research topics: Safety and Risk Analysis Methodologies Certification to Safety Fault Tolerance (including Software Quality aspects) Safe Software Redundancy Techniques (HW / SW) Human Reliability / Usability 3

4 Motivation 4

5 Motivation The improvement in situational awareness for pilots greatly increases safety (FAA, 2010) 5

6 Surveillance Technologies? What is surveillance? 6

7 What is Surveillance? Aeronautical Surveillance System provides the aircraft position and other related information to ATM and/or airborne users (ICAO, 2012) 7

8 What is Surveillance? Air Traffic Control architecture (VISMARI; CAMARGO JR, 2009) 8

9 What is Surveillance? Main Roles of Surveillance: Monitor expectations of aircraft movements Monitor actual trajectories of aircraft Indicate when expectations and trajectories do not match Can be used as the basis alerting systems Alert ATC when aircraft deviates or when there is a conflict Influences separation distances and efficiency of a given airspace 9

10 Surveillance Technologies? ADS-B in Air Traffic Control 10

11 ADS-B in Air Traffic Control Information provided by ADS-B Position: obtained from GNSS Integrity HPL (Horizontal Protection Level) HFOM (Horizontal Figure of Merit) Altitude Identification: provided by the Transponder 11

12 Integrity of Data using ADS-B RAIM Technique 12

13 RAIM Technique Receiver Autonomous Integrity Monitoring 13

14 RAIM Technique (Hegarty & Chatre, 2008) 14

15 Safety Assessment Methodology 15

16 Safety Assessment Methodology Qualitative Approach (Relative Method) Reference Scenario X Proposed Scenario Quantitative Approach (Absolut Method) Numerical analysis of aeronautical system metrics 16

17 Safety Assessment Methodology Test Bed 17

18 Safety Assessment Methodology PIpE-SEC architecture (Concept) ElectronicController HumanPilot PILOT ControllerModel PIpE-SEC ACTS ON POSITION REFERENCES AIRCRAFT (CONTROL LAYER) EXPERIMENT MANAGER NAVIGATION COMUNICATION AUTHORIZATIONS / INSTRUCTIONS REQUESTS / NOTIFICATIONS SURVEILLANCE INFORMATION SURVEILLANCE ATCo 18

19 References Gil, F. D. O., Camargo Jr, J. B., Almeida Jr, J. R. de, Vismari, L. F., Cugnasca, P. S., Gimenes, R. A. V., & Furtado, V. H. (2010). PIPE-SEC: Platform for tests and validation of Unmanned Aerial Vehicles (UAVS) operation in controlled airspace. Journal of the Brazilian Air Transportation Society, 6(2), Hegarty, C. J., & Chatre, E. (2008). Evolution of the Global Navigation SatelliteSystem (GNSS). Proceedings of the IEEE, 96(12), doi: /jproc ICAO. (2012). Doc Manual on Airborne Surveillance Applications (Draft). Retrieved from Documents/9994_en.pdf Vismari, L. F., & Camargo Jr, J. B. (2009). Quantitative safety assessment of CNS/ATM-based Air Traffic Control System. Journal of the Brazilian Air Transportation Societyournal of the Brazilian Air Transportation Society, 5(1), FAA. (2010). Fact Sheet Automatic Dependent Surveillance-Broadcast (ADS-B). Retrieved February 14, 2014, from 19

20 THANK YOU FOR YOUR ATTENTION For more information, please contact and visit our website Daniel Baraldi Sesso, M.Sc.Cand. Phone:

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