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CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED

CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED. Objectives and Tasks. Objectives: To provide relevant information for safety assessment R&D work, not any implementation objectives Tasks: Description of the operating environment and autonomous aircraft operations. OSED overview.

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CARE-ASAS Activity 3: ASM Autonomous Aircraft OSED

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  1. CARE-ASAS Activity 3: ASMAutonomous Aircraft OSED CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  2. Objectives and Tasks • Objectives: • To provide relevant information for safety assessment • R&D work, not any implementation objectives • Tasks: • Description of the operating environment and autonomous aircraft operations CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  3. OSED overview • Operating environment characteristics • Airspace and Traffic characteristics • Application Description • Expected benefits and constraints, human factors issues • Operating method without and with ASAS • Functional characteristics • Capturing time constraints • Information exchanges • Exception handling (human and system failures and emergency/contingency procedures) • Training CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  4. Airspace characteristics • FFAS surrounded by MAS only • Low/medium density and complexity • 4D RNAV (at least RNP1) RVSM applied • Segregated airspace : Only suitably equipped aircraft authorised (ADS-B, CDTI, CD&R capabilities) with qualified flight crew • Airborne self-separation • No fixed routes: aircraft fly their user preferred routes • Generic airspace CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  5. Airspace characteristics CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  6. Air Traffic Services • No ATC support within FFAS • New service: FFAS flow management • 3 levels: • Strategic / Pre-tactical / Tactical flow management • Role: • To define an orderly flow of traffic • To manage traffic global and local densities and traffic complexity to maintain them at appropriate level (E.g. Density shall remain under a maximum value) CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  7. Operations within FFAS (1/2) Three main phases: • Surrounding traffic surveillance and monitoring • Flight crew aware of surrounding traffic using its CDTI • Conflict detection and display • Detection of conflicts occurring within CD&R look ahead time (10min) • Aural and visual alerts • Display of traffic situation awareness and conflict information CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  8. Operations within FFAS (2/2) • Conflict resolution and implementation • Priority assigned to determine manoeuvring aircraft • Cross check and comparison of own and conflicting priorities done by flight crew • Flight crew has not priority • Manual or automatic solution computation • Flight crew has priority • Maintain its 4D trajectory until the other aircraft has resolve the conflict. • Both flight crews: Monitoring of resolution manoeuvre CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  9. Operations within FFAS Aircrew B Aircrew A Ttraffic Traffic display Look-ahead time 20 minutes ADS-B message (state information) ADS-B message (Intent information) Look-ahead time for CD&R 10 minutes TCD&R , TLow Conflict(s) detected Conflict(s) detected Priority determination Priority determination ADS-B message (CD&R information) Duration * A/A cross check on CDTI A/A cross check on CDTI Solution computation Solution engagement Automatic / Manual avoidance maneuver engaged ADS-B message (Intent information) TMedium Alarms Level 1 Level 2 THigh Level 3 Encounter Action and function Message CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  10. Airborne functionality (1/3) • Airborne surveillance • Based on ADS-B and own navigation data • Airborne conflict detection and resolution • Conflict detection • Based on surveillance function output and used aircraft state and intent information • ASAS alerting system • Three increasing levels: Low / Medium / High • Aural and visual alarms CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  11. Airborne functionality (2/3) • Conflict resolution • Manual solution • Automatic solution • Solver based on a priority rule based algorithm (EFR rules) • Produce conflict free trajectories (two lateral ones and a vertical one otherwise) taking into account conflicting aircraft and all surrounding aircraft trajectories • Integrate external constraints (e.g. not create high density zones, weather conditions, low cost) • After solution computation, flight plan automatically updated in the FMS CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  12. Airborne functionality (3/3) • HMI • CDTI Display of: • Surrounding traffic, • Conflict detection information • Priority determination • Conflict resolution • ACAS display • Priority given to ACAS display • Others • E.g. weather information CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  13. Emergency procedures • Own aircraft • Broadcast emergency messages (containing estimated positions) on VHF (and via ADS-B using the priority status field, if ADS-B emitter operating) • Contact by radio previous or receiving controller to obtain the VHF frequency of the MAS sector below • Join the vertical buffer zone below the FFAS • Contact controller of the MAS sector • Controller of the MAS below • Provide solution to the aircraft in emergency • Other aircraft • Assure separation with the aircraft in emergency using voice position reports or ADS-B messages CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  14. MAS/FFAS transition CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

  15. FFAS/MAS transition CARE/ASAS Activity 3: ASM workshop Brétigny, 19 December 2001

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