Performance Analysis of Space-Based ADS-B

Transcription

1 Performance Analysis of Space-Based ADS-B MIT Lincoln Labs ATC Workshop December 5 th, 2017 Dr. Michael Garcia and John Dolan 1

2 Agenda Aireon Overview On-Orbit Acceptance Test (OOAT) Performance Results Other Interesting Data Proof Points Closing Q&A 2

3 Aireon Overview 3 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

4 Aireon System Overview Aireon will have the first enterpriseclass, continuously global, 1090 MHz space-based ADS-B system 4

5 Constellation Overview Satellites in orbit: satellites per plane Plus 9 in-orbit spare satellites and 6 ground spare satellites Orbital Planes: 6 Operational altitude: 780 km Availability:

6 Aireon Hosted Payload Main Mission Antenna L-band 6

7 7

8 Program Schedule System Development / Production Payloads: 81 of 81 assembled and tested First Launch Final Launch Pre-Launch Testing On-Orbit Test Operations and Maint. (O&M) ICAO Sep. and Airspace Safety Panel (SASP) Trials ANSP Sep. Services: Safety Cases and Cert. IOC at Key Sites Planned Ongoing Production Site IOCs 8 Complete 2019+

9 Launch Status, Planning and Projected Coverage 9 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

10 Launch 1 Coverage 8 Payloads on May 11 10

11 Launch 1 Coverage 8 Payloads Stitched Ov er 24 Hours on May 29 11

12 Launch 2 Coverage 12

13 Launch 2 Coverage Stage 3A Service Volumes 13 Payloads Stitched Ove r 24 Hours on 7/26 w/ St age 3A 13

14 Aireon s Hamburger Counter Over 3 billion ADS-B position messages received per month! 14

15 Launch 3 Coverage 15

16 On Orbit Test Results 16 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

17 Activities to Operations Aireon Acceptance Testing Operations Development Infrastructure Design & Specification On Orbit Acceptance Test (OOAT) Infrastructure Implementation & Integration Aireon Service Acceptance Test (SACT) AOC Design, Staffing & Training, Dry Runs & Test Aireon Ops Go Live SACT will Include: System Performance Testing Business System Testing Operational Testing Aireon Safety Aireon SMS Implementation EASA Certification ANSP Acceptance Gander / Shanwick Initial Operations ANSP Operations (#3 - #n) 17

18 Aireon s Key OOAT Test Cases Test Case Description PVTC-11 Low-power target performance PVTC-12 Track A/C in high-fruit regions PVTC-14 Pattern measurement with transmitters 18

19 Aireon s Simulation (& Analysis) Tool: ASIM Aircraft and Avionics Behavior Interference Environment (ADS-B, ATCRBS, Mode S, etc.) Aireon Payload Behavior ASIM uses a stochastic modeling process for each element of the system to estimate performance at granular and aggregate levels ASIM Performance Metrics: Update Interval, Availability, Bandwidth, etc. 19

20 OOAT PVTC11 Low Power Target Performance 20 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

21 Several Flight Tests Conducted NAV CANADA Test Flight June 1 st, 2017 Polaris Flight Systems Test Flight Nov 16 th, 2017 FAA Test Flight Dec 6 th, 2017 Performance Exceeding Design Standards For Surveillance 21

22 Pattern Record/Recognition Process Measured Mission Data Expected Remixed Tracks Pattern Rec Recreated Satellite Coverage Conformance = Measured/Expected Success Criteria: Sweet Spot

23 NAV CANADA Flight 6/1/

24 NAV CANADA Flight Test Results 24

25 OOAT PVTC12 Interference Model Validation Test Case 25 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

26 Polaris Flight Plan 11/16/2017 FlightAware Record from Terrestrial Data Aireon Data from SV107, SV132, SV129, & SV100 26

27 Polaris Flight Test Results 27

28 Payload Performance Data OOAT PVTC14 AHP Beam Characterization/Validation 28 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

29 Iqaluit Ground Based Reference Transmitter (GBRT) Uses a 4-Channel Selex Reference Trans mitter 29

30 GBRT Conformance Patterns 30

31 SV112 and SV104 Performance Comparison SV104 currently has a bandwidth allocation 5x higher than SV112 31

32 Other Interesting Observations from OOAT 32 AIREON AIREON LLC LLC PROPRIETARY INFORMATION

33 ADS-B Aircraft Tracks in Caribbean from Aireon before and during Hurricane Irma Our satellites are in the same approximate position about every 3 days. So this is the coverage from September 4 th, 2017 Flight operations in the Caribbean changed significantly as a result of Hurricane Irma from September 7 th,

34 Dashboard 34

35 Satellite Coverage Analysis (1) SV :08Z Max Range = 3783 km Min Elev = -4.6 Aircraft Count =

36 Satellite Coverage Analysis (2) SV :21Z Max Range = 3750 km Min Elev = -4.4 Aircraft Count =

37 Atlantic Traffic Seperation 150 NATS Separation Heatmap Altitude Delta, ft Data captured over the Atlantic shows how targets are being separated in oceanic airspace This two hour sample shows peaks at 60 and 120NM of horizontal separation and ft vertical separation 37

38 OOAT Summary The On Orbit Test campaign has successfully evaluated the Aireon system with Flight Tests Reference Transmitters Commercial Aircraft Data Analytics Each Additional Launch further improves our confidence in the capabilities of the system with continuous improvement of our knowledge, tools, and techniques 38

39 Thank you for your time!