GAGAN implementation and certification Programme. Presented by India

Transcription

1 GAGAN implementation and certification Programme Presented by India

2 GPS Aided Geo Augmented Navigation International Civil Aviation Organization (ICAO) Member States Endorsed Global Satellite Navigation System (GNSS) as the Future Air navigation System for Aviation. The National Steering Committee meeting on CNS/ ATM held on 8 th September, 2000 under the chairmanship of Secretary, Ministry of Civil Aviation approved in principle the GAGAN (GPS Aided Geo Augmented Navigation) project proposal. The GAGAN Project is being executed by ISRO and AAI. The implementation of the GAGAN Programme was planned in 2 phases: GAGAN TDS (Technology Demonstration System) completed in GAGAN FOP (Final Operational Phase)

3 GAGAN TDS Objective The first phase of multi phase program to implement a space based augmentation over the Indian FIR. To demonstrate feasibility of SBAS implementation over Indian region with minimum set of elements and to achieve horizontal and vertical accuracy of 7.6mtrs, 95% of the time over the selected area of Indian land mass with 6.2 seconds time to alarm To study the ionosphere over the Indian region & to collect data for system development and necessary modifications for the Indian region for the Final Operational Phase.

4 GAGAN TDS Configuration GPS L1 &L2 GEO L1 & L5 GEO C Band (UP) GPS L &L2 Jammu Delhi INRE S (Qty.8 ) GPS RX Antenn a INMC C (Qty.1) INLUS (Qty.1) Corrections INLUS and Integrity, RF Messages Antenna Ahmedabad Bangalore Trivandrum Kolkata Port Blair Guwahati Data Communication Network INRES INMCC & INLUS Used for signal coverage studies, Performance analysis Flight Trials to study signal usability and accuracy studies GAGAN TDS was not intended for safety of life application like Civil Aviation

5 TEC Network New TEC stations added in (not shown on the map) (Total Electron Content TEC)) Station Lat. Long. Khajuraho 25 N 80 E Gaya 25 N 85 E Nagpur 21 N 79 E Aurangabad 20 N 75.5 E Bhuvaneshwar 20 N 85.5 E Hubli 15.5 N 75 E Madurai 9.5 N 78 E Agra 27 N 77.5 E 5

6 GAGAN TDS Final System Acceptance Test (FSAT) Requirements Tested via INMARSAT 4F1 13 & 14 August 2007 # Parameter Requirements Results 1 Vertical and Horizontal Accuracy < 7.6m (95% of time) 2 Time-to-Alarm < 6.2 Sec. 3 SBAS Receiver Demonstration Lock to GAGAN PRN & Process GAGAN TDS Messages Verification results were well within performance requirements Vertical and Horizontal Accuracy & Time to Alarm

7 GAGAN Final Operation Phase (FOP) GEO Satellites Users GPS constellation 3 Uplink stations 2 Control Centres 15 Reference Stations 2 Data communication networks

8 GAGAN FOP Objective Compatible and Interoperable with other SBAS to provide Seamless navigation Realize a certified and operational SBAS to provide air navigation services of RNP 0.1 en route navigation within India FIR APV 1 precision approach over landmass of Indian FIR Common coverage of GAGAN GEO satellites (55 o, 82 o & 93.5 o ) is beyond Indian FIR (GSAT 8, GSAT10 & GSAT 15) GSAT 8 launched on 21 May 11. Space Segment uses SBAS PRN code 127; GSAT 10 launched on 29 th Sept 2012 Signal In Space available since 15 December 2011 Key Elements Integrity Availability Continuity Accuracy

9 Site Survey Certification (June,2013) Ground Elements Readiness (INRES, INLUS, INMCC) FSAT (July,2012) Major Activities Ionosphere Model GSAT (8)/10 launch & Integration PSAT (Dec,2010)

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11 The unique ISRO Grid Model Multi Layer Data Fusion (IGM MLDF) has provided the cutting edge technology for meeting the challenges of equatorial ionospheric anomalies arising over lower latitudes.

12 Multi Layer Data Fusion IPPs delay and confidence at 250 km shell height IPPs delay and confidence at 450 km shell height GIVD and sigma fit computation at 250 km shell height GIVD and sigma fit computation at 450 km shell height GIVE MONITOR Transform / Scale GIVD,GIVE at 350 km shell height DATA FUSION 12 Courtesy S.K.Mishra

13 MLDF Results (Preliminary) Nominal Days Selection Criteria Parameters Ref. Value MLDF (NO MOPS) Land availability Land availability Continuity risk per PA 8 e -6 /15 sec 5.37E-03 Integrity plausibility HPE<HPL, VPE<VPL User position accuracy VPE/HPE 16m, 20m 7.40/10.60 GIVD accuracy RMS 1m 0.37 GIVD accuracy Max 10m 3.80 GIVD error bounding Gaussian sigma Stormy Days (To check ruggedness of algorithm) Selection Criteria Parameters Ref. Value MLDF (NO MOPS) Land availability Land availability Continuity risk per PA 8 e -6 /15 sec 1.77E-02 Integrity plausibility HPE<HPL VPE<VPL User position accuracy VPE/HPE 16m, 20m 10.92/18.5 GIVD accuracy RMS 1m 0.46 GIVD accuracy Max 10m 6.93 GIVD error bounding Gaussian sigma

14 Coordination with ICAO Service Identification Coordinated through NSP, ICAO, Montreal. Channel Number allocation for APV approaches APANPIRG 23 was apprised and coordinated with Secretary, NSP Reference Path Identifier in FAS data block for GAGAN ( 4 character alphanumeric) Current Status GAGAN is allocated Service ID number 03 with effect from November (Amendment 87 to Annex 10) As Channel Number is a globally unique number, FAA is central agency for allocation to service providers. India will be the nodal agency for coordination with FAA for GAGAN approaches. Amendment request for DOC 8168 to include letter G for GAGAN in the lead character in line with other operational SBAS systems. This will be taken up with ICAO Headquarters by India.

15 GAGAN Certification-Approach GAGAN is a very complex system that: Relies on a large amount of software, both to generate the SIS and to monitor it. The Signal in space (SIS) itself is complex, covers very large areas, and can be used by many users simultaneously The SIS is required to provide integrity bounds.

16 Delta Certification Approach WAAS Safety Artifacts PHMI Fault Tree Analysis GAGAN Requirements, ISRO Equipment Failure Rates Integrity -related deltas WAAS FTA Safety Artifact Evaluation Artifact Evaluation Findings ENB Artifact is not impacted by safetyrelated deltas Bin 1 Artifact supports FTA and may be impacted by safetyrelated deltas Bin 2 Artifact does not support FTA and may be impacted by safety-related deltas Bin 3 WAAS Artifacts Provide Assurance GAGAN Delta Analysis, Artifact and Independent (TRT) Review is Required GAGAN Delta Analysis, Artifact and Raytheon Internal Review is Required 16

17 Delta Certification Approach The delta analysis concept will also be applied for: the common cause analysis Safety Processor input analysis other safety related analyses (e.g., the Hazard Tracking Database [HTDB]), which includes hazard records unique to GAGAN).

18 GAGAN Technical Review Team (TRT) Formed by DGCA is represented by officials from: DGCA AAI, ISRO, IISC, MITRE, Raytheon Three TRT meetings have been completed since its formation in November 2011 MLDF IONO algorithm review completed. TRT to investigate GAGAN integrity issues System safety assurance reviews, Review of GAGAN specific artefacts.

19 GAGAN Certification Process Ready to Operate Service Approval June 13 Develop Instrument Procedure, OT&E tools, Offline Monitoring OPS IMPLEMENTATION System Commissioned, Trained Manpower, System Maintenance etc Approve Procedure Facility Approval (Dec 12) GROUND AIRCRAFT System Approval (Dec 12) DGCA Approve Installation AAI & ISRO Install Equipment AAI &ISRO Approve Equipment By Raytheon Build Equipment Approve Installation Install Equipment Approve Equipment Build Equipment By Raytheon Design Equipment Design Equipment

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21 RNP 0.1 APV 1

22 ACTION BY THE CONFERENCE The India s effort for implementation of Space Based Augmentation System (GAGAN) over Indian Airspace by July The GAGAN capability to extend its coverage beyond Indian FIR that would harmonize and be a driver for GNSS implementation programmes within the region to provide seamless Air Traffic Management. India s commitment to be the nodal agency for coordinating with FAA for obtaining channel number allocation for all GAGAN based APV approaches within GAGAN footprint.