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J. Cosmen / GMV

Safety Critical Applications with Galileo ETSC Best in Europe Conference 2006. J. Cosmen / GMV. Contents. Galileo Differenciators GNSS Road Applications Galileo Added Value for Road Integrity as a key factor for new Road Applications Applications Needs vs. Galileo Capabilities

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J. Cosmen / GMV

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  1. Safety Critical Applications with Galileo ETSC Best in Europe Conference 2006 J. Cosmen / GMV

  2. Contents • Galileo Differenciators • GNSS Road Applications • Galileo Added Value for Road • Integrity as a key factor for new Road Applications • Applications Needs vs. Galileo Capabilities • Conclusions Page 2

  3. Key Features: Galileo Differenciators • Galileo introduces, in addition to European independence, major improvements w.r.t. GPS: • New Services such as SAR • Improved signal characteristics • Civil Control • Built-in Service Integrity • Service guarantee through a Contractual Commitment (SLA) Anticipated in EGNOS for Europe  No need to wait! Page 3

  4. In addition... Results based on >80% <15% - GPS - - GPS+GALILEO+EGNOS • … combined use of GPS + Galileo substantially improves availability in urban environments Page 4

  5. Classification of Road Applications • GIROADS proposes a classification according to the level of service guarantee requested: • Safety Critical • Liability Critical • No specific Guarantee Requirements More Demanding Page 5

  6. Safety-Critical Applications • Term used in various domains as in civil aviation • Those in which GNSS errors can provoke situations potentially affecting health or life of human beings • What is Safety Critical in Road?: • ADAS (GNSS in the driving loop): errors can provoke accidents ->direct impact • Emergency services: errors may affect the service quality -> indirect impact Page 6

  7. Liability Critical Applications • Liability critical Applications • Position used for legal decisions or economic transactions. • Large position errors, although improbable, might have a major legal or economical impact • Probability of these bad consequences has to extremely low to make them negligible • Examples in Road Applications: • Legal proof (e.g. speed limit enforcement): efficicent enforcement to reduce accidents -> also indirect impact on safety • Charging (e.g. road user charging) Page 7

  8. GNSS Applications for Road Page 8

  9. Galileo key for GNSS Road Applications • Galileo (and EGNOS), unlike GPS, provides signal integrity. • Because of the major consequences of errrors, both liability critical and safety critical applications require position integrity, i.e. ensuring that errors are below certain threshold. • Galileo (and EGNOS) are key enablers for new Road applications. Why integrity is important instead of accuracy? Page 9

  10. Integrity vs. Accuracy: Example High Accuracy but no Integrity Low Accuracy but with Integrity 20cm 10cm 8 cm Accuracy (e.g. error at 95%) 18 cm Integrity (percentage inside the yellow circle) 100% 99% Would you rely on the more accurate knife thrower? Page 10

  11. PositionIntegrity Position Error Real Position Protection Level Estimated Position • Integrity Performance Characterised by: • The Size of the Protection Level • The Time To Alarm (TTA): maximum time to let the user known that the error exceeded the Protection Level • The Integrity Risk: probability that the real position is out of the Protection Level (without informing the user) • Practical Implementation ->Protection Levels: “a circle around the estimated position where the real position is guaranteed to be with a very high probability” Page 11

  12. Emergency Services Requirements Emergency Services Requirements Galileo SoL Capabilities Most Demanding 10-10 10-8 Integrity Risk 10-6 Less Demanding 10-4 10-2 0.1 0.1 1 1 Emergency Services (as liability critical) are feasible with Galileo SoL/CS TTA (sec) 10 Protection Levels (m) 10 100 Page 12

  13. ADAS Requirements ADAS (control) Requirements 10-10 10-8 Galileo SoL Capabilities Integrity Risk 10-6 10-4 Technology Improvement (e.g. TCAR) 10-2 0.1 0.1 1 1 TTA (sec) 10 ADAS (GNSS in the driving loop) requirements are still far from Galileo Capabilities Protection Levels (m) 10 100 Page 13

  14. Conclusions • Galileo in the future (and EGNOS now) open the door to new Road Applications • Liability and Saftey critical ones are the best examples of those new applications • Galileo (and EGNOS) performance well cover Liability Critical and Emergency Service Requirements and then Galileo contributes to increase the road safety • ADAS based on GNSS still immature as required performance and complexity are still far from Galileo system capabilities • In all those applications Position Integrity is the key and then EGNOS and Galileo become enablers Page 14

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